Question

I want to extend this GUI application in java language. Thanks for the help in advance.

import java.awt.EventQueue;

import javax.swing.JFrame;

import javax.swing.JButton;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;

public class FormWindow {

    private JFrame frame;

    /**

     * Launch the application.

     */

    public static void main(String[] args) {

        EventQueue.invokeLater(new Runnable() {

            public void run() {

                try {

                    FormWindow window = new FormWindow();

                    window.frame.setVisible(true);

                } catch (Exception e) {

                    e.printStackTrace();

                }

            }

        });

    }

    /**

     * Create the application.

     */

    public FormWindow() {

        initialize();

    }

    /**

     * Initialize the contents of the frame.

     */

    private void initialize() {

        frame = new JFrame();

        frame.setBounds(100, 100, 450, 300);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.getContentPane().setLayout(null);

       

        JButton btnNewButton = new JButton("Exit App!");

        btnNewButton.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {

                System.exit(0);

            }

        });

        btnNewButton.setBounds(149, 104, 127, 73);

        frame.getContentPane().add(btnNewButton);

       

        JButton btnNewButton_1 = new JButton("Write Output");

        btnNewButton_1.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {

                System.err.println("Output Test");

            }

        });

        btnNewButton_1.setBounds(149, 59, 127, 34);

        frame.getContentPane().add(btnNewButton_1);

    }

}

Extend Your Interface Review Exercise Extend your GUI list application using Eclipse and WindowBuilder to include the following new features. 1. Add items to the list using a text field on your form 2. Remove items by index using a different text field on your form 3. Add 100 randomly generated items to the list Upload your Window.java file as well as a Word document with screen-shots of your application. Student.java Account.java Sys def Write Output Exit App!

Answer 1

package say.swing;

import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import java.awt.event.ActionEvent;

public class FormWindow {
   private JFrame frame;

   /**
   * Launch the application.
   */

   List<String> listItem = new ArrayList<String>();

   public static void main(String[] args) {
       EventQueue.invokeLater(new Runnable() {
           public void run() {
               try {
                   FormWindow window = new FormWindow();
                   window.frame.setVisible(true);
               } catch (Exception e) {
                   e.printStackTrace();
               }
           }
       });
   }

   /**
   * Create the application.
   */
   public FormWindow() {
       initialize();
   }

   /**
   * Initialize the contents of the frame.
   */
   private void initialize() {
       //UI componenets
       frame = new JFrame();
       frame.setBounds(100, 100, 450, 300);
       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       frame.getContentPane().setLayout(null);

       JTextField addItem = new JTextField("Add Item");
       JTextField removeItem = new JTextField("Remove Item");

       JButton addItemButton = new JButton("Add Item");
       JButton removeItemButton = new JButton("Remove Item");
       //Event listner
       removeItemButton.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent e) {
               if (removeItem.getText().trim().length() != 0) {
                   //Check index and display message or delete
                   int index = Integer.parseInt(removeItem.getText().trim());
                   if(index > listItem.size()) {
                       JOptionPane.showMessageDialog(null, "Index out of range. Enter index with in " + (listItem.size()-1));
                   }else {
                       listItem.remove(index);
                   }
               }
                  
               else
                   JOptionPane.showMessageDialog(null, "Write something in add item box then click button");
           }
       });
       addItem.setBounds(50, 10, 100, 25);
       removeItem.setBounds(200, 10, 100, 25);
       frame.getContentPane().add(addItem);
       frame.getContentPane().add(removeItem);
       ////Event listner
       addItemButton.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent e) {
               //Check index and display message or add
               if (addItem.getText().trim().length() != 0)
                   listItem.add(addItem.getText().trim());
               else
                   JOptionPane.showMessageDialog(null, "Write something in add item box then click button");
           }
       });

       addItemButton.setBounds(10, 104, 127, 73);
       frame.getContentPane().add(addItemButton);
       removeItemButton.setBounds(300, 104, 127, 73);
       frame.getContentPane().add(removeItemButton);
       JButton btnNewButton = new JButton("Exit App!");
       ////Event listner
       btnNewButton.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent e) {
               //Exit
               System.exit(0);
           }
       });
       btnNewButton.setBounds(149, 174, 127, 73);
       frame.getContentPane().add(btnNewButton);
       //Write output
       JButton btnNewButton_1 = new JButton("Write Output");
       //Event listner
       btnNewButton_1.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent e) {
               //Loop thru all item
               StringBuffer sb = new StringBuffer();
               for(String s: listItem) {
                   sb.append(s+" ");
                   //Print to console
                   System.out.println(s);
               }
               //Display
               JOptionPane.showMessageDialog(null, sb.toString());
           }
       });
       btnNewButton_1.setBounds(149, 59, 127, 34);
       frame.getContentPane().add(btnNewButton_1);
   }
}

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