Rent and return are now both working features

books.json

@@ -1,19 +1,20 @@
-{"0": {
-    "Status": "RENTED",
-    "Title": "Cracking the Coding Interview",
-    "Due Date": [
-        10,
-        10,
-        2010
-    ]
-},
-"1": {
-  "Status": "RENTED",
-  "Title": "Who was that?",
-  "Due Date": [
-    1,
-    1,
-    1
-  ]
-}
+{
+    "0": {
+        "Status": "RENTED",
+        "Title": "Cracking the Coding Interview",
+        "Due Date": [
+            2017,
+            6,
+            8
+        ]
+    },
+    "1": {
+        "Status": "AVAILABLE",
+        "Title": "Who was that?",
+        "Due Date": [
+            2017,
+            6,
+            8
+        ]
+    }
 }

src/main/java/libsys/Book.java

@@ -74,7 +74,7 @@ class Book
   public boolean rent(int[] dueDate)
   {
     //Check if the book is available to be rented
-    if(status != "AVAILABLE")
+    if(!"AVAILABLE".equals(status))
     {
       return false;
     }

src/main/java/libsys/BookFactory.java

@@ -30,13 +30,10 @@ class BookFactory
   {
     try
     {
-      System.out.println("Reading data from file...");
       FileInputStream in = new FileInputStream(bookFilename);
       JSONObject obj = new JSONObject(new JSONTokener(in));
       String [] ids = JSONObject.getNames(obj);
-      System.out.println();
 
-      System.out.println("Parsing data into ArrayList...");
       for (int i = 0; i < ids.length; i++)
       {
         JSONObject jsonBook = obj.getJSONObject(ids[i]);
@@ -52,8 +49,6 @@ class BookFactory
         }
         books.add(new Book(id, title, status, dueDate));
       }
-      System.out.println();
-
       in.close();
     }
     catch (Exception ex)
@@ -81,7 +76,6 @@ class BookFactory
       }
       out.println(booksObj.toString(4));
       out.close();
-      System.out.println("Books exported to JSON file.");
     }
     catch (Exception e)
     {
@@ -127,13 +121,13 @@ class BookFactory
     throw new NullPointerException();
   }
 
-  public void update(Book newBook)
+  public void update(Book oldBook, Book newBook)
   {
     for (int i = 0; i < books.size(); i++)
     {
       Book temp = books.get(i);
 
-      if(temp.getId() == newBook.getId())
+      if(temp.getId() == oldBook.getId())
       {
         books.set(i, newBook);
       }

src/main/java/libsys/Handler.java

@@ -12,7 +12,7 @@ class Handler
   Exception BookNotFound = new Exception("Error 404 : Book not found");
   BookFactory books = new BookFactory();
   UserFactory users = new UserFactory();
-  Calendar cal;
+  Calendar cal = Calendar.getInstance();
 
   public Handler()
   {
@@ -22,15 +22,16 @@ class Handler
   public boolean borrowBook(User user, Book book)
   {
     User newUser = user;
+    Book newBook = book;
 
-    if(book.getStatus() == "AVAILABLE" && newUser.status())
+    if(("AVAILABLE".equals(book.getStatus())) && newUser.status() && newBook.rent(calDueDate(10)) && newUser.borrowNewBook(book.getId()))
     {
-      book.rent(calDueDate(10));
-      newUser.borrowNewBook(book.getId());
-
-      books.update(book);
+      books.update(book, newBook);
       users.update(user, newUser);
 
+      books.toJsonFile("books.json");
+      users.toJsonFile("users.json");
+
       return true;
     }
 
@@ -40,14 +41,18 @@ class Handler
   public boolean returnBook(User user, Book book)
   {
     User newUser = user;
+    Book newBook = book;
 
     if(newUser.returnBook(book.getId()))
     {
       book.returned();
 
-      books.update(book);
+      books.update(book, newBook);
       users.update(user, newUser);
 
+      books.toJsonFile("books.json");
+      users.toJsonFile("users.json");
+
       return true;
     }
 
@@ -127,9 +132,9 @@ class Handler
   {
     int[] currentDay = new int[3];
 
-    currentDay[0] = cal.get(Calendar.YEAR) + 1900;
+    currentDay[0] = cal.get(Calendar.YEAR);
     currentDay[1] = cal.get(Calendar.MONTH) + 1;
-    currentDay[2] = cal.get(Calendar.DAY_OF_MONTH);
+    currentDay[2] = cal.get(Calendar.DATE);
 
     return currentDay;
   }
@@ -141,11 +146,9 @@ class Handler
     for (int i = 0; i < bookIDs.length; i++)
     {
       titlesString += books.getBook(bookIDs[i]).getTitle();
-      titlesString += "; \n";
+      titlesString += "; ";
     }
 
-    System.out.println(titlesString);
-
     return titlesString;
   }
 }

src/main/java/libsys/MainGUI.form

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 
-<Form version="1.3" maxVersion="1.9" type="org.netbeans.modules.form.forminfo.JFrameFormInfo">
+<Form version="1.5" maxVersion="1.9" type="org.netbeans.modules.form.forminfo.JFrameFormInfo">
   <Properties>
     <Property name="defaultCloseOperation" type="int" value="3"/>
   </Properties>
@@ -24,31 +24,35 @@
     <DimensionLayout dim="0">
       <Group type="103" groupAlignment="0" attributes="0">
           <Group type="102" attributes="0">
-              <EmptySpace min="0" pref="7" max="32767" attributes="0"/>
-              <Component id="jPanel1" min="-2" max="-2" attributes="0"/>
+              <EmptySpace min="-2" pref="7" max="-2" attributes="0"/>
+              <Component id="mainPanel" max="32767" attributes="0"/>
+              <EmptySpace max="-2" attributes="0"/>
           </Group>
       </Group>
     </DimensionLayout>
     <DimensionLayout dim="1">
       <Group type="103" groupAlignment="0" attributes="0">
           <Group type="102" attributes="0">
-              <EmptySpace min="0" pref="0" max="32767" attributes="0"/>
-              <Component id="jPanel1" min="-2" max="-2" attributes="0"/>
-              <EmptySpace min="0" pref="0" max="32767" attributes="0"/>
+              <EmptySpace max="-2" attributes="0"/>
+              <Component id="mainPanel" max="32767" attributes="0"/>
+              <EmptySpace max="-2" attributes="0"/>
           </Group>
       </Group>
     </DimensionLayout>
   </Layout>
   <SubComponents>
-    <Container class="javax.swing.JPanel" name="jPanel1">
+    <Container class="javax.swing.JPanel" name="mainPanel">
+      <AuxValues>
+        <AuxValue name="JavaCodeGenerator_InitCodePre" type="java.lang.String" value="//setExtendedState(javax.swing.JFrame.MAXIMIZED_BOTH);"/>
+      </AuxValues>
 
       <Layout>
         <DimensionLayout dim="0">
           <Group type="103" groupAlignment="0" attributes="0">
               <Group type="102" alignment="0" attributes="0">
-                  <EmptySpace max="-2" attributes="0"/>
-                  <Component id="jTabbedPane1" min="-2" max="-2" attributes="0"/>
-                  <EmptySpace pref="32" max="32767" attributes="0"/>
+                  <EmptySpace min="-2" max="-2" attributes="0"/>
+                  <Component id="jTabbedPane" max="32767" attributes="0"/>
+                  <EmptySpace min="-2" max="-2" attributes="0"/>
               </Group>
           </Group>
         </DimensionLayout>
@@ -56,14 +60,14 @@
           <Group type="103" groupAlignment="0" attributes="0">
               <Group type="102" alignment="0" attributes="0">
                   <EmptySpace max="-2" attributes="0"/>
-                  <Component id="jTabbedPane1" min="-2" max="-2" attributes="0"/>
-                  <EmptySpace max="32767" attributes="0"/>
+                  <Component id="jTabbedPane" max="32767" attributes="0"/>
+                  <EmptySpace max="-2" attributes="0"/>
               </Group>
           </Group>
         </DimensionLayout>
       </Layout>
       <SubComponents>
-        <Container class="javax.swing.JTabbedPane" name="jTabbedPane1">
+        <Container class="javax.swing.JTabbedPane" name="jTabbedPane">
 
           <Layout class="org.netbeans.modules.form.compat2.layouts.support.JTabbedPaneSupportLayout"/>
           <SubComponents>
@@ -82,9 +86,9 @@
                       <Group type="102" attributes="0">
                           <EmptySpace max="-2" attributes="0"/>
                           <Group type="103" groupAlignment="0" attributes="0">
-                              <Group type="102" alignment="0" attributes="0">
-                                  <Component id="bookSearch" min="-2" pref="108" max="-2" attributes="0"/>
-                                  <EmptySpace max="32767" attributes="0"/>
+                              <Group type="102" attributes="0">
+                                  <Component id="bookSearch" max="32767" attributes="0"/>
+                                  <EmptySpace type="unrelated" max="-2" attributes="0"/>
                                   <Component id="bookSearchBtn" min="-2" max="-2" attributes="0"/>
                               </Group>
                               <Group type="102" attributes="0">
@@ -93,8 +97,9 @@
                                       <Component id="bookStatus" alignment="0" min="-2" max="-2" attributes="0"/>
                                       <Component id="bookMgtLabel" alignment="0" min="-2" max="-2" attributes="0"/>
                                       <Component id="bookID" alignment="0" min="-2" max="-2" attributes="0"/>
+                                      <Component id="bookDueDate" alignment="0" min="-2" max="-2" attributes="0"/>
                                   </Group>
-                                  <EmptySpace min="0" pref="0" max="32767" attributes="0"/>
+                                  <EmptySpace min="0" pref="115" max="32767" attributes="0"/>
                               </Group>
                           </Group>
                           <EmptySpace max="-2" attributes="0"/>
@@ -117,7 +122,9 @@
                           <Component id="bookID" min="-2" max="-2" attributes="0"/>
                           <EmptySpace type="unrelated" max="-2" attributes="0"/>
                           <Component id="bookStatus" min="-2" max="-2" attributes="0"/>
-                          <EmptySpace pref="74" max="32767" attributes="0"/>
+                          <EmptySpace type="unrelated" max="-2" attributes="0"/>
+                          <Component id="bookDueDate" min="-2" max="-2" attributes="0"/>
+                          <EmptySpace pref="88" max="32767" attributes="0"/>
                       </Group>
                   </Group>
                 </DimensionLayout>
@@ -137,6 +144,9 @@
                   <Properties>
                     <Property name="text" type="java.lang.String" value="Search"/>
                   </Properties>
+                  <AuxValues>
+                    <AuxValue name="JavaCodeGenerator_InitCodePost" type="java.lang.String" value="bookSearchBtn.addActionListener(new ActionListener() {&#xa;    public void actionPerformed(ActionEvent evt)&#xa;    {&#xa;    bookSearchBtnActionPerformed(evt);&#xa;    }&#xa;});"/>
+                  </AuxValues>
                 </Component>
                 <Component class="javax.swing.JLabel" name="bookTitle">
                   <Properties>
@@ -153,6 +163,11 @@
                     <Property name="text" type="java.lang.String" value="ID :"/>
                   </Properties>
                 </Component>
+                <Component class="javax.swing.JLabel" name="bookDueDate">
+                  <Properties>
+                    <Property name="text" type="java.lang.String" value="Due Date :"/>
+                  </Properties>
+                </Component>
               </SubComponents>
             </Container>
             <Container class="javax.swing.JPanel" name="userPanel">
@@ -170,9 +185,10 @@
                       <Group type="102" attributes="0">
                           <EmptySpace max="-2" attributes="0"/>
                           <Group type="103" groupAlignment="0" attributes="0">
-                              <Group type="102" alignment="0" attributes="0">
-                                  <Component id="userSearch" min="-2" pref="108" max="-2" attributes="0"/>
-                                  <EmptySpace max="32767" attributes="0"/>
+                              <Component id="rentBtn" max="32767" attributes="0"/>
+                              <Group type="102" attributes="0">
+                                  <Component id="userSearch" max="32767" attributes="0"/>
+                                  <EmptySpace type="unrelated" max="-2" attributes="0"/>
                                   <Component id="userSearchBtn" min="-2" max="-2" attributes="0"/>
                               </Group>
                               <Group type="102" attributes="0">
@@ -183,8 +199,9 @@
                                       <Component id="userBooks" alignment="0" min="-2" max="-2" attributes="0"/>
                                       <Component id="userLimit" alignment="0" min="-2" max="-2" attributes="0"/>
                                   </Group>
-                                  <EmptySpace min="0" pref="0" max="32767" attributes="0"/>
+                                  <EmptySpace min="0" pref="120" max="32767" attributes="0"/>
                               </Group>
+                              <Component id="returnBtn" alignment="0" max="32767" attributes="0"/>
                           </Group>
                           <EmptySpace max="-2" attributes="0"/>
                       </Group>
@@ -208,7 +225,11 @@
                           <Component id="userLimit" min="-2" max="-2" attributes="0"/>
                           <EmptySpace type="unrelated" max="-2" attributes="0"/>
                           <Component id="userBooks" min="-2" max="-2" attributes="0"/>
-                          <EmptySpace pref="46" max="32767" attributes="0"/>
+                          <EmptySpace type="unrelated" max="-2" attributes="0"/>
+                          <Component id="rentBtn" min="-2" max="-2" attributes="0"/>
+                          <EmptySpace max="32767" attributes="0"/>
+                          <Component id="returnBtn" min="-2" max="-2" attributes="0"/>
+                          <EmptySpace max="-2" attributes="0"/>
                       </Group>
                   </Group>
                 </DimensionLayout>
@@ -228,6 +249,9 @@
                   <Properties>
                     <Property name="text" type="java.lang.String" value="Search"/>
                   </Properties>
+                  <AuxValues>
+                    <AuxValue name="JavaCodeGenerator_InitCodePost" type="java.lang.String" value="userSearchBtn.addActionListener(new ActionListener() {&#xa;    public void actionPerformed(ActionEvent evt)&#xa;    {&#xa;        userSearchBtnActionPerformed(evt);&#xa;    }&#xa;});"/>
+                  </AuxValues>
                 </Component>
                 <Component class="javax.swing.JLabel" name="userName">
                   <Properties>
@@ -249,6 +273,28 @@
                     <Property name="text" type="java.lang.String" value="Books :"/>
                   </Properties>
                 </Component>
+                <Component class="javax.swing.JButton" name="rentBtn">
+                  <Properties>
+                    <Property name="text" type="java.lang.String" value="Rent Another Book"/>
+                  </Properties>
+                  <Events>
+                    <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="rentBtnActionPerformed"/>
+                  </Events>
+                  <AuxValues>
+                    <AuxValue name="JavaCodeGenerator_ListenersCodePost" type="java.lang.String" value="rentBtn.setVisible(false);"/>
+                  </AuxValues>
+                </Component>
+                <Component class="javax.swing.JButton" name="returnBtn">
+                  <Properties>
+                    <Property name="text" type="java.lang.String" value="Return Book"/>
+                  </Properties>
+                  <Events>
+                    <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="returnBtnActionPerformed"/>
+                  </Events>
+                  <AuxValues>
+                    <AuxValue name="JavaCodeGenerator_ListenersCodePost" type="java.lang.String" value="rentBtn.setVisible(false);"/>
+                  </AuxValues>
+                </Component>
               </SubComponents>
             </Container>
           </SubComponents>

src/main/java/libsys/MainGUI.java

@@ -7,227 +7,324 @@ import java.awt.event.ActionListener;
 
 public class MainGUI extends javax.swing.JFrame
 {
-  Handler handler;
-
-  public MainGUI(Handler handler)
-  {
-    this.handler = handler;
-    initComponents();
-  }
-
-  //GEN-BEGIN:initComponents
-  private void initComponents()
-  {
-    setExtendedState(javax.swing.JFrame.MAXIMIZED_BOTH);
-    mainPanel = new javax.swing.JPanel();
-    jTabbedPane = new javax.swing.JTabbedPane();
-    bookPanel = new javax.swing.JPanel();
-    bookMgtLabel = new javax.swing.JLabel();
-    bookSearch = new javax.swing.JTextField();
-    bookSearchBtn = new javax.swing.JButton();
-    bookTitle = new javax.swing.JLabel();
-    bookStatus = new javax.swing.JLabel();
-    bookID = new javax.swing.JLabel();
-    userPanel = new javax.swing.JPanel();
-    userMgtLabel = new javax.swing.JLabel();
-    userSearch = new javax.swing.JTextField();
-    userSearchBtn = new javax.swing.JButton();
-    userName = new javax.swing.JLabel();
-    userLimit = new javax.swing.JLabel();
-    userID = new javax.swing.JLabel();
-    userBooks = new javax.swing.JLabel();
-
-    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
-
-    bookMgtLabel.setFont(new java.awt.Font("Lucida Grande", 0, 18)); // NOI18N
-    bookMgtLabel.setText("Book Management");
-
-    bookSearchBtn.setText("Search");
-    bookSearchBtn.addActionListener(new ActionListener()
+    Handler handler;
+
+    public MainGUI(Handler handler)
     {
-      public void actionPerformed(ActionEvent evt)
-      {
-        bookSearchBtnActionPerformed(evt);
-      }
-    });
+      this.handler = handler;
+      initComponents();
+    }
+
+    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
+    private void initComponents() {
+
+        mainPanel = new javax.swing.JPanel();
+        jTabbedPane = new javax.swing.JTabbedPane();
+        bookPanel = new javax.swing.JPanel();
+        bookMgtLabel = new javax.swing.JLabel();
+        bookSearch = new javax.swing.JTextField();
+        bookSearchBtn = new javax.swing.JButton();
+        bookTitle = new javax.swing.JLabel();
+        bookStatus = new javax.swing.JLabel();
+        bookID = new javax.swing.JLabel();
+        bookDueDate = new javax.swing.JLabel();
+        userPanel = new javax.swing.JPanel();
+        userMgtLabel = new javax.swing.JLabel();
+        userSearch = new javax.swing.JTextField();
+        userSearchBtn = new javax.swing.JButton();
+        userName = new javax.swing.JLabel();
+        userLimit = new javax.swing.JLabel();
+        userID = new javax.swing.JLabel();
+        userBooks = new javax.swing.JLabel();
+        rentBtn = new javax.swing.JButton();
+        returnBtn = new javax.swing.JButton();
+
+        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
+
+        //setExtendedState(javax.swing.JFrame.MAXIMIZED_BOTH);
 
-    bookTitle.setText("Title : ");
+        bookMgtLabel.setFont(new java.awt.Font("Lucida Grande", 0, 18)); // NOI18N
+        bookMgtLabel.setText("Book Management");
 
-    bookStatus.setText("Status :");
+        bookSearchBtn.setText("Search");
+        bookSearchBtn.addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent evt)
+            {
+                bookSearchBtnActionPerformed(evt);
+            }
+        });
 
-    bookID.setText("ID :");
+        bookTitle.setText("Title : ");
 
-    javax.swing.GroupLayout bookPanelLayout = new javax.swing.GroupLayout(bookPanel);
-    bookPanel.setLayout(bookPanelLayout);
-    bookPanelLayout.setHorizontalGroup(
-        bookPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
-        .addGroup(bookPanelLayout.createSequentialGroup()
-            .addContainerGap()
-            .addGroup(bookPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+        bookStatus.setText("Status :");
+
+        bookID.setText("ID :");
+
+        bookDueDate.setText("Due Date :");
+
+        javax.swing.GroupLayout bookPanelLayout = new javax.swing.GroupLayout(bookPanel);
+        bookPanel.setLayout(bookPanelLayout);
+        bookPanelLayout.setHorizontalGroup(
+            bookPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+            .addGroup(bookPanelLayout.createSequentialGroup()
+                .addContainerGap()
+                .addGroup(bookPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+                    .addGroup(bookPanelLayout.createSequentialGroup()
+                        .addComponent(bookSearch)
+                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
+                        .addComponent(bookSearchBtn))
+                    .addGroup(bookPanelLayout.createSequentialGroup()
+                        .addGroup(bookPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+                            .addComponent(bookTitle)
+                            .addComponent(bookStatus)
+                            .addComponent(bookMgtLabel)
+                            .addComponent(bookID)
+                            .addComponent(bookDueDate))
+                        .addGap(0, 115, Short.MAX_VALUE)))
+                .addContainerGap())
+        );
+        bookPanelLayout.setVerticalGroup(
+            bookPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+            .addGroup(bookPanelLayout.createSequentialGroup()
+                .addContainerGap()
                 .addComponent(bookMgtLabel)
-                .addGroup(bookPanelLayout.createSequentialGroup()
-                    .addComponent(bookSearch, javax.swing.GroupLayout.PREFERRED_SIZE, 108, javax.swing.GroupLayout.PREFERRED_SIZE)
-                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
+                .addGroup(bookPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
+                    .addComponent(bookSearch, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                     .addComponent(bookSearchBtn))
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                 .addComponent(bookTitle)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
+                .addComponent(bookID)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                 .addComponent(bookStatus)
-                .addComponent(bookID))
-            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
-    );
-    bookPanelLayout.setVerticalGroup(
-        bookPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
-        .addGroup(bookPanelLayout.createSequentialGroup()
-            .addContainerGap()
-            .addComponent(bookMgtLabel)
-            .addGap(18, 18, 18)
-            .addGroup(bookPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
-                .addComponent(bookSearch, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
-                .addComponent(bookSearchBtn))
-            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
-            .addComponent(bookID)
-            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
-            .addComponent(bookTitle)
-            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
-            .addComponent(bookStatus)
-            .addContainerGap(38, Short.MAX_VALUE))
-    );
-
-    jTabbedPane.addTab("Book", bookPanel);
-
-    userMgtLabel.setFont(new java.awt.Font("Lucida Grande", 0, 18)); // NOI18N
-    userMgtLabel.setText("User Management");
-
-    userSearchBtn.setText("Search");
-    userSearchBtn.addActionListener(new ActionListener()
-    {
-      public void actionPerformed(ActionEvent evt)
-      {
-        userSearchBtnActionPerformed(evt);
-      }
-    });
-
-    userName.setText("Name : ");
-
-    userLimit.setText("Limit :");
-
-    userID.setText("ID :");
-
-    userBooks.setText("Books :");
-
-    javax.swing.GroupLayout userPanelLayout = new javax.swing.GroupLayout(userPanel);
-    userPanel.setLayout(userPanelLayout);
-    userPanelLayout.setHorizontalGroup(
-        userPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
-        .addGroup(userPanelLayout.createSequentialGroup()
-            .addContainerGap()
-            .addGroup(userPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
-                .addGroup(userPanelLayout.createSequentialGroup()
-                    .addComponent(userSearch, javax.swing.GroupLayout.PREFERRED_SIZE, 108, javax.swing.GroupLayout.PREFERRED_SIZE)
-                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
+                .addComponent(bookDueDate)
+                .addContainerGap(88, Short.MAX_VALUE))
+        );
+
+        jTabbedPane.addTab("Book", bookPanel);
+
+        userMgtLabel.setFont(new java.awt.Font("Lucida Grande", 0, 18)); // NOI18N
+        userMgtLabel.setText("User Management");
+
+        userSearchBtn.setText("Search");
+        userSearchBtn.addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent evt)
+            {
+                userSearchBtnActionPerformed(evt);
+            }
+        });
+
+        userName.setText("Name : ");
+
+        userLimit.setText("Limit :");
+
+        userID.setText("ID :");
+
+        userBooks.setText("Books :");
+
+        rentBtn.setText("Rent Another Book");
+        rentBtn.addActionListener(new java.awt.event.ActionListener() {
+            public void actionPerformed(java.awt.event.ActionEvent evt) {
+                rentBtnActionPerformed(evt);
+            }
+        });
+        rentBtn.setVisible(false);
+
+        returnBtn.setText("Return Book");
+        returnBtn.addActionListener(new java.awt.event.ActionListener() {
+            public void actionPerformed(java.awt.event.ActionEvent evt) {
+                returnBtnActionPerformed(evt);
+            }
+        });
+        rentBtn.setVisible(false);
+
+        javax.swing.GroupLayout userPanelLayout = new javax.swing.GroupLayout(userPanel);
+        userPanel.setLayout(userPanelLayout);
+        userPanelLayout.setHorizontalGroup(
+            userPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+            .addGroup(userPanelLayout.createSequentialGroup()
+                .addContainerGap()
+                .addGroup(userPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+                    .addComponent(rentBtn, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
+                    .addGroup(userPanelLayout.createSequentialGroup()
+                        .addComponent(userSearch)
+                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
+                        .addComponent(userSearchBtn))
+                    .addGroup(userPanelLayout.createSequentialGroup()
+                        .addGroup(userPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+                            .addComponent(userID)
+                            .addComponent(userMgtLabel)
+                            .addComponent(userName)
+                            .addComponent(userBooks)
+                            .addComponent(userLimit))
+                        .addGap(0, 120, Short.MAX_VALUE))
+                    .addComponent(returnBtn, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
+                .addContainerGap())
+        );
+        userPanelLayout.setVerticalGroup(
+            userPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+            .addGroup(userPanelLayout.createSequentialGroup()
+                .addContainerGap()
+                .addComponent(userMgtLabel)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
+                .addGroup(userPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
+                    .addComponent(userSearch, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                     .addComponent(userSearchBtn))
-                .addGroup(userPanelLayout.createSequentialGroup()
-                    .addGroup(userPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
-                        .addComponent(userMgtLabel)
-                        .addComponent(userName)
-                        .addComponent(userID)
-                        .addComponent(userBooks)
-                        .addComponent(userLimit))
-                    .addGap(0, 0, Short.MAX_VALUE)))
-            .addContainerGap())
-    );
-    userPanelLayout.setVerticalGroup(
-        userPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
-        .addGroup(userPanelLayout.createSequentialGroup()
-            .addContainerGap()
-            .addComponent(userMgtLabel)
-            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
-            .addGroup(userPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
-                .addComponent(userSearch, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
-                .addComponent(userSearchBtn))
-            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
-            .addComponent(userName)
-            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
-            .addComponent(userID)
-            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
-            .addComponent(userLimit)
-            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
-            .addComponent(userBooks)
-            .addContainerGap(28, Short.MAX_VALUE))
-    );
-
-    jTabbedPane.addTab("User", userPanel);
-
-    javax.swing.GroupLayout mainPanelLayout = new javax.swing.GroupLayout(mainPanel);
-    mainPanel.setLayout(mainPanelLayout);
-    mainPanelLayout.setHorizontalGroup(
-        mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
-        .addGroup(mainPanelLayout.createSequentialGroup()
-            .addContainerGap()
-            .addComponent(jTabbedPane, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
-            .addContainerGap(32, Short.MAX_VALUE))
-    );
-    mainPanelLayout.setVerticalGroup(
-        mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
-        .addGroup(mainPanelLayout.createSequentialGroup()
-            .addContainerGap()
-            .addComponent(jTabbedPane, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
-            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
-    );
-
-    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
-    getContentPane().setLayout(layout);
-    layout.setHorizontalGroup(
-        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
-        .addGroup(layout.createSequentialGroup()
-            .addGap(0, 7, Short.MAX_VALUE)
-            .addComponent(mainPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
-    );
-    layout.setVerticalGroup(
-        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
-        .addGroup(layout.createSequentialGroup()
-            .addGap(0, 0, Short.MAX_VALUE)
-            .addComponent(mainPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
-            .addGap(0, 0, Short.MAX_VALUE))
-    );
-
-    pack();
-  }
-  //GEN-END:initComponents
-
-  private void bookSearchBtnActionPerformed(ActionEvent evt)
-  {
-    Book thisBook = handler.books.getBook(0);
-    bookID.setText("ID : " + thisBook.getId());
-    bookTitle.setText("Title : " + thisBook.getTitle());
-    bookStatus.setText("Status : " + thisBook.getStatus());
-  }
-
-  private void userSearchBtnActionPerformed(ActionEvent evt)
-  {
-    User thisUser = handler.users.getUser(0);
-    userID.setText("ID : " + thisUser.getId());
-    userName.setText("Name : " + thisUser.getName());
-    userLimit.setText("Limit : " + thisUser.getLimit());
-    userBooks.setText("Books : " + handler.bookIdsToTitlesString(thisUser.bookStatus()));
-  }
-
-  //GEN-BEGIN:variables
-  private javax.swing.JLabel bookID;
-  private javax.swing.JLabel bookMgtLabel;
-  private javax.swing.JPanel bookPanel;
-  private javax.swing.JTextField bookSearch;
-  private javax.swing.JButton bookSearchBtn;
-  private javax.swing.JLabel bookStatus;
-  private javax.swing.JLabel bookTitle;
-  private javax.swing.JPanel mainPanel;
-  private javax.swing.JTabbedPane jTabbedPane;
-  private javax.swing.JLabel userBooks;
-  private javax.swing.JLabel userID;
-  private javax.swing.JLabel userLimit;
-  private javax.swing.JLabel userMgtLabel;
-  private javax.swing.JLabel userName;
-  private javax.swing.JPanel userPanel;
-  private javax.swing.JTextField userSearch;
-  private javax.swing.JButton userSearchBtn;
-  //GEN-END:variables
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
+                .addComponent(userName)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
+                .addComponent(userID)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
+                .addComponent(userLimit)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
+                .addComponent(userBooks)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
+                .addComponent(rentBtn)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
+                .addComponent(returnBtn)
+                .addContainerGap())
+        );
+
+        jTabbedPane.addTab("User", userPanel);
+
+        javax.swing.GroupLayout mainPanelLayout = new javax.swing.GroupLayout(mainPanel);
+        mainPanel.setLayout(mainPanelLayout);
+        mainPanelLayout.setHorizontalGroup(
+            mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+            .addGroup(mainPanelLayout.createSequentialGroup()
+                .addContainerGap()
+                .addComponent(jTabbedPane)
+                .addContainerGap())
+        );
+        mainPanelLayout.setVerticalGroup(
+            mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+            .addGroup(mainPanelLayout.createSequentialGroup()
+                .addContainerGap()
+                .addComponent(jTabbedPane)
+                .addContainerGap())
+        );
+
+        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
+        getContentPane().setLayout(layout);
+        layout.setHorizontalGroup(
+            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+            .addGroup(layout.createSequentialGroup()
+                .addGap(7, 7, 7)
+                .addComponent(mainPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
+                .addContainerGap())
+        );
+        layout.setVerticalGroup(
+            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+            .addGroup(layout.createSequentialGroup()
+                .addContainerGap()
+                .addComponent(mainPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
+                .addContainerGap())
+        );
+
+        pack();
+    }// </editor-fold>//GEN-END:initComponents
+
+    private void returnBtnActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_returnBtnActionPerformed
+
+        User thisUser = handler.users.getUser(Integer.parseInt(userSearch.getText()));
+        ReturnDialog toReturnUI = new ReturnDialog(this, true, handler, thisUser.getId());
+        toReturnUI.setVisible(true);
+        int toReturnID = toReturnUI.getReturnStatus();
+
+        if (toReturnID != -1)
+        {
+          handler.returnBook(thisUser, handler.books.getBook(toReturnID));
+          userSearchBtnActionPerformed(evt);
+          bookSearchBtnActionPerformed(evt);
+        }
+    }//GEN-LAST:event_returnBtnActionPerformed
+
+    private void rentBtnActionPerformed(java.awt.event.ActionEvent evt)
+    {
+        User thisUser = handler.users.getUser(Integer.parseInt(userSearch.getText()));
+        RentDialog toRentUI = new RentDialog(this, true, handler);
+        toRentUI.setVisible(true);
+        int toRentID = toRentUI.getReturnStatus();
+
+        if (toRentID != -1)
+        {
+          handler.borrowBook(thisUser, handler.books.getBook(toRentID));
+          userSearchBtnActionPerformed(evt);
+          bookSearchBtnActionPerformed(evt);
+        }
+    }
+    
+    private void bookSearchBtnActionPerformed(ActionEvent evt)
+    {
+        try
+        {
+            Book thisBook = handler.books.getBook(Integer.parseInt(bookSearch.getText()));
+            bookID.setText("ID : " + thisBook.getId());
+            bookTitle.setText("Title : " + thisBook.getTitle());
+            bookStatus.setText("Status : " + thisBook.getStatus());
+            if ("RENTED".equals(thisBook.getStatus()))
+            {
+                bookDueDate.setText("Due date : " + thisBook.getDueDate()[0] + "/" + thisBook.getDueDate()[1] + "/" + thisBook.getDueDate()[2]);
+            }
+            else
+            {
+                bookDueDate.setText("Due date : ");
+            }
+        }
+        catch (Exception e)
+        {
+            bookID.setText("ERROR : BOOK NOT FOUND");
+            bookTitle.setText("");
+            bookStatus.setText("");
+            bookDueDate.setText("");
+        }
+    }
+
+    private void userSearchBtnActionPerformed(ActionEvent evt)
+    {
+        try
+        {
+            User thisUser = handler.users.getUser(Integer.parseInt(userSearch.getText()));
+            userID.setText("ID : " + thisUser.getId());
+            userName.setText("Name : " + thisUser.getName());
+            userLimit.setText("Limit : " + thisUser.getLimit());
+            userBooks.setText("Books : " + handler.bookIdsToTitlesString(thisUser.bookStatus()));
+            rentBtn.setVisible(thisUser.status());
+            returnBtn.setVisible(thisUser.bookStatus().length > 0);
+        }
+        catch (Exception e)
+        {
+            userID.setText("ERROR : USER NOT FOUND");
+            userName.setText("");
+            userLimit.setText("");
+            userBooks.setText("");
+            rentBtn.setVisible(false);
+            returnBtn.setVisible(false);
+        }
+    }
+
+    // Variables declaration - do not modify//GEN-BEGIN:variables
+    private javax.swing.JLabel bookDueDate;
+    private javax.swing.JLabel bookID;
+    private javax.swing.JLabel bookMgtLabel;
+    private javax.swing.JPanel bookPanel;
+    private javax.swing.JTextField bookSearch;
+    private javax.swing.JButton bookSearchBtn;
+    private javax.swing.JLabel bookStatus;
+    private javax.swing.JLabel bookTitle;
+    private javax.swing.JTabbedPane jTabbedPane;
+    private javax.swing.JPanel mainPanel;
+    private javax.swing.JButton rentBtn;
+    private javax.swing.JButton returnBtn;
+    private javax.swing.JLabel userBooks;
+    private javax.swing.JLabel userID;
+    private javax.swing.JLabel userLimit;
+    private javax.swing.JLabel userMgtLabel;
+    private javax.swing.JLabel userName;
+    private javax.swing.JPanel userPanel;
+    private javax.swing.JTextField userSearch;
+    private javax.swing.JButton userSearchBtn;
+    // End of variables declaration//GEN-END:variables
 }

src/main/java/libsys/RentDialog.form

@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+
+<Form version="1.5" maxVersion="1.9" type="org.netbeans.modules.form.forminfo.JDialogFormInfo">
+  <SyntheticProperties>
+    <SyntheticProperty name="formSizePolicy" type="int" value="1"/>
+    <SyntheticProperty name="generateCenter" type="boolean" value="false"/>
+  </SyntheticProperties>
+  <Events>
+    <EventHandler event="windowClosing" listener="java.awt.event.WindowListener" parameters="java.awt.event.WindowEvent" handler="closeDialog"/>
+  </Events>
+  <AuxValues>
+    <AuxValue name="FormSettings_autoResourcing" type="java.lang.Integer" value="0"/>
+    <AuxValue name="FormSettings_autoSetComponentName" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_generateFQN" type="java.lang.Boolean" value="true"/>
+    <AuxValue name="FormSettings_generateMnemonicsCode" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_i18nAutoMode" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_layoutCodeTarget" type="java.lang.Integer" value="1"/>
+    <AuxValue name="FormSettings_listenerGenerationStyle" type="java.lang.Integer" value="0"/>
+    <AuxValue name="FormSettings_variablesLocal" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_variablesModifier" type="java.lang.Integer" value="2"/>
+  </AuxValues>
+
+  <Layout>
+    <DimensionLayout dim="0">
+      <Group type="103" groupAlignment="0" attributes="0">
+          <Group type="102" attributes="0">
+              <EmptySpace max="-2" attributes="0"/>
+              <Group type="103" groupAlignment="0" attributes="0">
+                  <Component id="label" pref="234" max="32767" attributes="0"/>
+                  <Group type="102" attributes="0">
+                      <Component id="cancelButton" linkSize="1" min="-2" max="-2" attributes="0"/>
+                      <EmptySpace max="32767" attributes="0"/>
+                      <Component id="okButton" linkSize="1" min="-2" pref="67" max="-2" attributes="0"/>
+                  </Group>
+                  <Component id="givenBookId" alignment="0" max="32767" attributes="0"/>
+                  <Group type="102" alignment="0" attributes="0">
+                      <Component id="invalidLabel" min="-2" max="-2" attributes="0"/>
+                      <EmptySpace min="0" pref="0" max="32767" attributes="0"/>
+                  </Group>
+              </Group>
+              <EmptySpace max="-2" attributes="0"/>
+          </Group>
+      </Group>
+    </DimensionLayout>
+    <DimensionLayout dim="1">
+      <Group type="103" groupAlignment="0" attributes="0">
+          <Group type="102" alignment="1" attributes="0">
+              <EmptySpace max="-2" attributes="0"/>
+              <Component id="label" min="-2" max="-2" attributes="0"/>
+              <EmptySpace pref="16" max="32767" attributes="0"/>
+              <Component id="invalidLabel" min="-2" max="-2" attributes="0"/>
+              <EmptySpace type="unrelated" max="-2" attributes="0"/>
+              <Component id="givenBookId" min="-2" max="-2" attributes="0"/>
+              <EmptySpace type="separate" max="-2" attributes="0"/>
+              <Group type="103" groupAlignment="3" attributes="0">
+                  <Component id="cancelButton" alignment="3" min="-2" max="-2" attributes="0"/>
+                  <Component id="okButton" alignment="3" min="-2" max="-2" attributes="0"/>
+              </Group>
+              <EmptySpace max="-2" attributes="0"/>
+          </Group>
+      </Group>
+    </DimensionLayout>
+  </Layout>
+  <SubComponents>
+    <Component class="javax.swing.JButton" name="okButton">
+      <Properties>
+        <Property name="text" type="java.lang.String" value="OK"/>
+      </Properties>
+      <Events>
+        <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="okButtonActionPerformed"/>
+      </Events>
+      <AuxValues>
+        <AuxValue name="JavaCodeGenerator_AddingCodePost" type="java.lang.String" value="getRootPane().setDefaultButton(okButton);"/>
+      </AuxValues>
+    </Component>
+    <Component class="javax.swing.JButton" name="cancelButton">
+      <Properties>
+        <Property name="text" type="java.lang.String" value="Cancel"/>
+      </Properties>
+      <Events>
+        <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="cancelButtonActionPerformed"/>
+      </Events>
+    </Component>
+    <Component class="javax.swing.JLabel" name="label">
+      <Properties>
+        <Property name="text" type="java.lang.String" value="Please input the book ID:"/>
+      </Properties>
+    </Component>
+    <Component class="javax.swing.JTextField" name="givenBookId">
+    </Component>
+    <Component class="javax.swing.JLabel" name="invalidLabel">
+      <Properties>
+        <Property name="text" type="java.lang.String" value="INVALID ID!"/>
+      </Properties>
+      <AuxValues>
+        <AuxValue name="JavaCodeGenerator_InitCodePost" type="java.lang.String" value="invalidLabel.setVisible(false);"/>
+      </AuxValues>
+    </Component>
+  </SubComponents>
+</Form>

src/main/java/libsys/RentDialog.java

@@ -0,0 +1,214 @@
+package libsys;
+
+import java.awt.event.ActionEvent;
+import java.awt.event.KeyEvent;
+import javax.swing.AbstractAction;
+import javax.swing.ActionMap;
+import javax.swing.InputMap;
+import javax.swing.JComponent;
+import javax.swing.KeyStroke;
+
+public class RentDialog extends javax.swing.JDialog {
+
+    static Handler handler = new Handler();
+    /**
+     * A return status code - returned if Cancel button has been pressed
+     */
+    public static final int RET_CANCEL = -1;
+
+    /**
+     * Creates new form RentDialog
+     */
+    public RentDialog(java.awt.Frame parent, boolean modal, Handler handler) {
+        super(parent, modal);
+        this.handler = handler;
+        initComponents();
+
+        // Close the dialog when Esc is pressed
+        String cancelName = "cancel";
+        InputMap inputMap = getRootPane().getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
+        inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0), cancelName);
+        ActionMap actionMap = getRootPane().getActionMap();
+        actionMap.put(cancelName, new AbstractAction() {
+            public void actionPerformed(ActionEvent e) {
+                doClose(RET_CANCEL);
+            }
+        });
+    }
+
+    /**
+     * @return the return status of this dialog - one of RET_OK or RET_CANCEL
+     */
+    public int getReturnStatus() {
+        return returnStatus;
+    }
+
+    /**
+     * This method is called from within the constructor to initialize the form.
+     * WARNING: Do NOT modify this code. The content of this method is always
+     * regenerated by the Form Editor.
+     */
+    @SuppressWarnings("unchecked")
+    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
+    private void initComponents() {
+
+        okButton = new javax.swing.JButton();
+        cancelButton = new javax.swing.JButton();
+        label = new javax.swing.JLabel();
+        givenBookId = new javax.swing.JTextField();
+        invalidLabel = new javax.swing.JLabel();
+
+        addWindowListener(new java.awt.event.WindowAdapter() {
+            public void windowClosing(java.awt.event.WindowEvent evt) {
+                closeDialog(evt);
+            }
+        });
+
+        okButton.setText("OK");
+        okButton.addActionListener(new java.awt.event.ActionListener() {
+            public void actionPerformed(java.awt.event.ActionEvent evt) {
+                okButtonActionPerformed(evt);
+            }
+        });
+
+        cancelButton.setText("Cancel");
+        cancelButton.addActionListener(new java.awt.event.ActionListener() {
+            public void actionPerformed(java.awt.event.ActionEvent evt) {
+                cancelButtonActionPerformed(evt);
+            }
+        });
+
+        label.setText("Please input the book ID:");
+
+        invalidLabel.setText("INVALID ID!");
+        invalidLabel.setVisible(false);
+
+        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
+        getContentPane().setLayout(layout);
+        layout.setHorizontalGroup(
+            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+            .addGroup(layout.createSequentialGroup()
+                .addContainerGap()
+                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+                    .addComponent(label, javax.swing.GroupLayout.DEFAULT_SIZE, 234, Short.MAX_VALUE)
+                    .addGroup(layout.createSequentialGroup()
+                        .addComponent(cancelButton)
+                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
+                        .addComponent(okButton, javax.swing.GroupLayout.PREFERRED_SIZE, 67, javax.swing.GroupLayout.PREFERRED_SIZE))
+                    .addComponent(givenBookId)
+                    .addGroup(layout.createSequentialGroup()
+                        .addComponent(invalidLabel)
+                        .addGap(0, 0, Short.MAX_VALUE)))
+                .addContainerGap())
+        );
+
+        layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {cancelButton, okButton});
+
+        layout.setVerticalGroup(
+            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
+                .addContainerGap()
+                .addComponent(label)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 16, Short.MAX_VALUE)
+                .addComponent(invalidLabel)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
+                .addComponent(givenBookId, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
+                .addGap(18, 18, 18)
+                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
+                    .addComponent(cancelButton)
+                    .addComponent(okButton))
+                .addContainerGap())
+        );
+
+        getRootPane().setDefaultButton(okButton);
+
+        pack();
+    }// </editor-fold>//GEN-END:initComponents
+
+    private void okButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_okButtonActionPerformed
+        try
+        {
+            if ("AVAILABLE".equals(handler.books.getBook(Integer.parseInt(givenBookId.getText())).getStatus()))
+            {
+                doClose(Integer.parseInt(givenBookId.getText()));
+            }
+            else
+            {
+                invalidLabel.setVisible(true);
+            }
+        }
+        catch (Exception e)
+        {
+            invalidLabel.setVisible(true);
+        }
+    }//GEN-LAST:event_okButtonActionPerformed
+
+    private void cancelButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_cancelButtonActionPerformed
+        doClose(RET_CANCEL);
+    }//GEN-LAST:event_cancelButtonActionPerformed
+
+    /**
+     * Closes the dialog
+     */
+    private void closeDialog(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_closeDialog
+        doClose(RET_CANCEL);
+    }//GEN-LAST:event_closeDialog
+    
+    private void doClose(int retStatus) {
+        returnStatus = retStatus;
+        setVisible(false);
+        dispose();
+    }
+
+    /**
+     * @param args the command line arguments
+     */
+    public static void main(String args[]) {
+        /* Set the Nimbus look and feel */
+        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
+        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
+         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
+         */
+        try {
+            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
+                if ("Nimbus".equals(info.getName())) {
+                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
+                    break;
+                }
+            }
+        } catch (ClassNotFoundException ex) {
+            java.util.logging.Logger.getLogger(RentDialog.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        } catch (InstantiationException ex) {
+            java.util.logging.Logger.getLogger(RentDialog.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        } catch (IllegalAccessException ex) {
+            java.util.logging.Logger.getLogger(RentDialog.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
+            java.util.logging.Logger.getLogger(RentDialog.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        }
+        //</editor-fold>
+
+        /* Create and display the dialog */
+        java.awt.EventQueue.invokeLater(new Runnable() {
+            public void run() {
+                RentDialog dialog = new RentDialog(new javax.swing.JFrame(), true, handler);
+                dialog.addWindowListener(new java.awt.event.WindowAdapter() {
+                    @Override
+                    public void windowClosing(java.awt.event.WindowEvent e) {
+                        System.exit(0);
+                    }
+                });
+                dialog.setVisible(true);
+            }
+        });
+    }
+
+    // Variables declaration - do not modify//GEN-BEGIN:variables
+    private javax.swing.JButton cancelButton;
+    private javax.swing.JTextField givenBookId;
+    private javax.swing.JLabel invalidLabel;
+    private javax.swing.JLabel label;
+    private javax.swing.JButton okButton;
+    // End of variables declaration//GEN-END:variables
+
+    private int returnStatus = RET_CANCEL;
+}

src/main/java/libsys/ReturnDialog.form

@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+
+<Form version="1.5" maxVersion="1.9" type="org.netbeans.modules.form.forminfo.JDialogFormInfo">
+  <SyntheticProperties>
+    <SyntheticProperty name="formSizePolicy" type="int" value="1"/>
+    <SyntheticProperty name="generateCenter" type="boolean" value="false"/>
+  </SyntheticProperties>
+  <Events>
+    <EventHandler event="windowClosing" listener="java.awt.event.WindowListener" parameters="java.awt.event.WindowEvent" handler="closeDialog"/>
+  </Events>
+  <AuxValues>
+    <AuxValue name="FormSettings_autoResourcing" type="java.lang.Integer" value="0"/>
+    <AuxValue name="FormSettings_autoSetComponentName" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_generateFQN" type="java.lang.Boolean" value="true"/>
+    <AuxValue name="FormSettings_generateMnemonicsCode" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_i18nAutoMode" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_layoutCodeTarget" type="java.lang.Integer" value="1"/>
+    <AuxValue name="FormSettings_listenerGenerationStyle" type="java.lang.Integer" value="0"/>
+    <AuxValue name="FormSettings_variablesLocal" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_variablesModifier" type="java.lang.Integer" value="2"/>
+  </AuxValues>
+
+  <Layout>
+    <DimensionLayout dim="0">
+      <Group type="103" groupAlignment="0" attributes="0">
+          <Group type="102" attributes="0">
+              <EmptySpace max="-2" attributes="0"/>
+              <Group type="103" groupAlignment="0" attributes="0">
+                  <Component id="label" pref="234" max="32767" attributes="0"/>
+                  <Group type="102" attributes="0">
+                      <Component id="cancelButton" linkSize="1" min="-2" max="-2" attributes="0"/>
+                      <EmptySpace max="32767" attributes="0"/>
+                      <Component id="okButton" linkSize="1" min="-2" pref="67" max="-2" attributes="0"/>
+                  </Group>
+                  <Component id="givenBookId" alignment="0" max="32767" attributes="0"/>
+                  <Group type="102" alignment="0" attributes="0">
+                      <Component id="invalidLabel" min="-2" max="-2" attributes="0"/>
+                      <EmptySpace min="0" pref="0" max="32767" attributes="0"/>
+                  </Group>
+              </Group>
+              <EmptySpace max="-2" attributes="0"/>
+          </Group>
+      </Group>
+    </DimensionLayout>
+    <DimensionLayout dim="1">
+      <Group type="103" groupAlignment="0" attributes="0">
+          <Group type="102" alignment="1" attributes="0">
+              <EmptySpace max="-2" attributes="0"/>
+              <Component id="label" min="-2" max="-2" attributes="0"/>
+              <EmptySpace pref="15" max="32767" attributes="0"/>
+              <Component id="invalidLabel" min="-2" max="-2" attributes="0"/>
+              <EmptySpace type="unrelated" max="-2" attributes="0"/>
+              <Component id="givenBookId" min="-2" max="-2" attributes="0"/>
+              <EmptySpace type="separate" max="-2" attributes="0"/>
+              <Group type="103" groupAlignment="3" attributes="0">
+                  <Component id="cancelButton" alignment="3" min="-2" max="-2" attributes="0"/>
+                  <Component id="okButton" alignment="3" min="-2" max="-2" attributes="0"/>
+              </Group>
+              <EmptySpace max="-2" attributes="0"/>
+          </Group>
+      </Group>
+    </DimensionLayout>
+  </Layout>
+  <SubComponents>
+    <Component class="javax.swing.JButton" name="okButton">
+      <Properties>
+        <Property name="text" type="java.lang.String" value="OK"/>
+      </Properties>
+      <Events>
+        <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="okButtonActionPerformed"/>
+      </Events>
+      <AuxValues>
+        <AuxValue name="JavaCodeGenerator_AddingCodePost" type="java.lang.String" value="getRootPane().setDefaultButton(okButton);"/>
+      </AuxValues>
+    </Component>
+    <Component class="javax.swing.JButton" name="cancelButton">
+      <Properties>
+        <Property name="text" type="java.lang.String" value="Cancel"/>
+      </Properties>
+      <Events>
+        <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="cancelButtonActionPerformed"/>
+      </Events>
+    </Component>
+    <Component class="javax.swing.JLabel" name="label">
+      <Properties>
+        <Property name="text" type="java.lang.String" value="Please input the book ID:"/>
+      </Properties>
+    </Component>
+    <Component class="javax.swing.JTextField" name="givenBookId">
+    </Component>
+    <Component class="javax.swing.JLabel" name="invalidLabel">
+      <Properties>
+        <Property name="text" type="java.lang.String" value="INVALID ID!"/>
+      </Properties>
+      <AuxValues>
+        <AuxValue name="JavaCodeGenerator_InitCodePost" type="java.lang.String" value="invalidLabel.setVisible(false);"/>
+      </AuxValues>
+    </Component>
+  </SubComponents>
+</Form>

src/main/java/libsys/ReturnDialog.java

@@ -0,0 +1,227 @@
+package libsys;
+
+import java.awt.event.ActionEvent;
+import java.awt.event.KeyEvent;
+import javax.swing.AbstractAction;
+import javax.swing.ActionMap;
+import javax.swing.InputMap;
+import javax.swing.JComponent;
+import javax.swing.KeyStroke;
+
+public class ReturnDialog extends javax.swing.JDialog {
+
+    static Handler handler = new Handler();
+    static int id;
+    /**
+     * A return status code - returned if Cancel button has been pressed
+     */
+    public static final int RET_CANCEL = -1;
+
+    /**
+     * Creates new form ReturnDialog
+     */
+    public ReturnDialog(java.awt.Frame parent, boolean modal, Handler handler, int id) {
+        super(parent, modal);
+        this.id = id;
+        this.handler = handler;
+        initComponents();
+
+        // Close the dialog when Esc is pressed
+        String cancelName = "cancel";
+        InputMap inputMap = getRootPane().getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
+        inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0), cancelName);
+        ActionMap actionMap = getRootPane().getActionMap();
+        actionMap.put(cancelName, new AbstractAction() {
+            public void actionPerformed(ActionEvent e) {
+                doClose(RET_CANCEL);
+            }
+        });
+    }
+
+    /**
+     * @return the return status of this dialog - one of RET_OK or RET_CANCEL
+     */
+    public int getReturnStatus() {
+        return returnStatus;
+    }
+
+    /**
+     * This method is called from within the constructor to initialize the form.
+     * WARNING: Do NOT modify this code. The content of this method is always
+     * regenerated by the Form Editor.
+     */
+    @SuppressWarnings("unchecked")
+    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
+    private void initComponents() {
+
+        okButton = new javax.swing.JButton();
+        cancelButton = new javax.swing.JButton();
+        label = new javax.swing.JLabel();
+        givenBookId = new javax.swing.JTextField();
+        invalidLabel = new javax.swing.JLabel();
+
+        addWindowListener(new java.awt.event.WindowAdapter() {
+            public void windowClosing(java.awt.event.WindowEvent evt) {
+                closeDialog(evt);
+            }
+        });
+
+        okButton.setText("OK");
+        okButton.addActionListener(new java.awt.event.ActionListener() {
+            public void actionPerformed(java.awt.event.ActionEvent evt) {
+                okButtonActionPerformed(evt);
+            }
+        });
+
+        cancelButton.setText("Cancel");
+        cancelButton.addActionListener(new java.awt.event.ActionListener() {
+            public void actionPerformed(java.awt.event.ActionEvent evt) {
+                cancelButtonActionPerformed(evt);
+            }
+        });
+
+        label.setText("Please input the book ID:");
+
+        invalidLabel.setText("INVALID ID!");
+        invalidLabel.setVisible(false);
+
+        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
+        getContentPane().setLayout(layout);
+        layout.setHorizontalGroup(
+            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+            .addGroup(layout.createSequentialGroup()
+                .addContainerGap()
+                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+                    .addComponent(label, javax.swing.GroupLayout.DEFAULT_SIZE, 234, Short.MAX_VALUE)
+                    .addGroup(layout.createSequentialGroup()
+                        .addComponent(cancelButton)
+                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
+                        .addComponent(okButton, javax.swing.GroupLayout.PREFERRED_SIZE, 67, javax.swing.GroupLayout.PREFERRED_SIZE))
+                    .addComponent(givenBookId)
+                    .addGroup(layout.createSequentialGroup()
+                        .addComponent(invalidLabel)
+                        .addGap(0, 0, Short.MAX_VALUE)))
+                .addContainerGap())
+        );
+
+        layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {cancelButton, okButton});
+
+        layout.setVerticalGroup(
+            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
+                .addContainerGap()
+                .addComponent(label)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 15, Short.MAX_VALUE)
+                .addComponent(invalidLabel)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
+                .addComponent(givenBookId, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
+                .addGap(18, 18, 18)
+                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
+                    .addComponent(cancelButton)
+                    .addComponent(okButton))
+                .addContainerGap())
+        );
+
+        getRootPane().setDefaultButton(okButton);
+
+        pack();
+    }// </editor-fold>//GEN-END:initComponents
+
+    private void okButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_okButtonActionPerformed
+        try
+        {
+            int[] borrowedList = handler.users.getUser(id).bookStatus();
+            boolean exist = false;
+            
+            for (int i = 0; i < borrowedList.length; i++)
+            {
+                if (borrowedList[i] == Integer.parseInt(givenBookId.getText()))
+                {
+                    exist = true;
+                }
+            }
+            
+            if (exist)
+            {
+                doClose(Integer.parseInt(givenBookId.getText()));
+            }
+            else
+            {
+                invalidLabel.setVisible(true);
+            }
+        }
+        catch (Exception e)
+        {
+            invalidLabel.setVisible(true);
+        }
+    }//GEN-LAST:event_okButtonActionPerformed
+
+    private void cancelButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_cancelButtonActionPerformed
+        doClose(RET_CANCEL);
+    }//GEN-LAST:event_cancelButtonActionPerformed
+
+    /**
+     * Closes the dialog
+     */
+    private void closeDialog(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_closeDialog
+        doClose(RET_CANCEL);
+    }//GEN-LAST:event_closeDialog
+
+    private void doClose(int retStatus) {
+        returnStatus = retStatus;
+        setVisible(false);
+        dispose();
+    }
+
+    /**
+     * @param args the command line arguments
+     */
+    public static void main(String args[]) {
+        /* Set the Nimbus look and feel */
+        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
+        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
+         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
+         */
+        try {
+            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
+                if ("Nimbus".equals(info.getName())) {
+                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
+                    break;
+                }
+            }
+        } catch (ClassNotFoundException ex) {
+            java.util.logging.Logger.getLogger(ReturnDialog.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        } catch (InstantiationException ex) {
+            java.util.logging.Logger.getLogger(ReturnDialog.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        } catch (IllegalAccessException ex) {
+            java.util.logging.Logger.getLogger(ReturnDialog.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
+            java.util.logging.Logger.getLogger(ReturnDialog.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        }
+        //</editor-fold>
+
+        /* Create and display the dialog */
+        java.awt.EventQueue.invokeLater(new Runnable() {
+            public void run() {
+                ReturnDialog dialog = new ReturnDialog(new javax.swing.JFrame(), true, handler, id);
+                dialog.addWindowListener(new java.awt.event.WindowAdapter() {
+                    @Override
+                    public void windowClosing(java.awt.event.WindowEvent e) {
+                        System.exit(0);
+                    }
+                });
+                dialog.setVisible(true);
+            }
+        });
+    }
+
+    // Variables declaration - do not modify//GEN-BEGIN:variables
+    private javax.swing.JButton cancelButton;
+    private javax.swing.JTextField givenBookId;
+    private javax.swing.JLabel invalidLabel;
+    private javax.swing.JLabel label;
+    private javax.swing.JButton okButton;
+    // End of variables declaration//GEN-END:variables
+
+    private int returnStatus = RET_CANCEL;
+}

src/main/java/libsys/UserFactory.java

@@ -33,9 +33,7 @@ class UserFactory
       FileInputStream in = new FileInputStream(userFilename);
       JSONObject obj = new JSONObject(new JSONTokener(in));
       String [] ids = JSONObject.getNames(obj);
-      System.out.println();
 
-      System.out.println("Parsing data into ArrayList...");
       for (int i = 0; i < ids.length; i++)
       {
         JSONObject jsonUser = obj.getJSONObject(ids[i]);
@@ -52,13 +50,39 @@ class UserFactory
 
         users.add(new User(name, id, limit, books));
       }
-      System.out.println();
       in.close();
     }
     catch (Exception ex)
     {
       System.out.println("Exception importing from json: " + ex.getMessage());
     }
+
+    id = getUser(users.size()-1).getId() + 1;
+  }
+
+  public void toJsonFile(String userFilename)
+  {
+    try
+    {
+      PrintWriter out = new PrintWriter(userFilename);
+      JSONObject usersObj = new JSONObject();
+      for (int i = 0; i < users.size(); i++)
+      {
+         User user = users.get(i);
+         JSONObject userObj = new JSONObject();
+         userObj.put("Name", user.getName());
+         userObj.put("Limit", user.getLimit());
+         userObj.put("Books", user.bookStatus());
+         usersObj.put(Integer.toString(user.getId()), userObj);
+      }
+      out.println(usersObj.toString(4));
+      out.close();
+    }
+    catch (Exception e)
+    {
+      System.out.println("exception: " + e.getMessage());
+      e.printStackTrace();
+    }
   }
 
   public User newUser(String name, int limit)

users.json

@@ -1,9 +1,12 @@
-{"0": {
-    "Name": "Whoever",
-    "Limit": "4",
-    "Books": [
-        0,
-        1
-    ]
-}
+{
+    "0": {
+        "Limit": 2,
+        "Books": [],
+        "Name": "FirstName LastName"
+    },
+    "1": {
+        "Limit": 100,
+        "Books": [0],
+        "Name": "John Doe"
+    }
 }