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Program Message Dialog di Java

Contoh program berikut ini menampilkan jenis-jenis window pesan di Java. Window pesan (message dialog) antara lain bertipe warning message, information message, confirmation message, dan juga input message. Class yang digunakan adalah class JOptionPane.

Source Code :
import java.awt.*;
 import java.awt.event.*;
 import javax.swing.*;
 public class MessageDialog extends JFrame {
 private JButton tombol, btn2, btn3, btn4, btn5;
 public MessageDialog() {
     super ("Event Handling");
     Container container = getContentPane();
     container.setLayout(new FlowLayout());
     tombol = new JButton ("Message Dialog");
     tombol.addActionListener(
         new ActionListener() {
             public void actionPerformed (ActionEvent e) {
                 JOptionPane.showMessageDialog (null,"Contoh Message Dialog");
             }
         }
     );

     container.add(tombol);
     btn2 = new JButton ("Warning Message");
     btn2.addActionListener(
         new ActionListener() {
             public void actionPerformed (ActionEvent e) {
                 JOptionPane.showConfirmDialog(null, "Contoh Warning Message","Peringatan",
                     JOptionPane.CLOSED_OPTION, JOptionPane.WARNING_MESSAGE);
             }
         }
     );

     container.add(btn2);
     btn3 = new JButton ("Question Message");
     btn3.addActionListener(
         new ActionListener() {
             public void actionPerformed (ActionEvent e) {
                 JOptionPane.showConfirmDialog(null, "Contoh Question Message","Pertanyaan",
                     JOptionPane.OK_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE);
             }
         }
     );

     container.add(btn3);
     btn4 = new JButton ("Information Message");
     btn4.addActionListener(
         new ActionListener() {
             public void actionPerformed (ActionEvent e) {
                 JOptionPane.showConfirmDialog(null, "Contoh Information Message","Informasi",
                     JOptionPane.NO_OPTION, JOptionPane.INFORMATION_MESSAGE);
             }
         }
     );

     container.add(btn4);
     btn5 = new JButton ("Input Dialog");
     btn5.addActionListener(
         new ActionListener() {
             public void actionPerformed (ActionEvent e) {
                 String a = JOptionPane.showInputDialog("Input Nama : ");
                 JOptionPane.showMessageDialog(null, a);
             }
         }
     );

     container.add(btn5);
     setSize (200,300);
     setLocationRelativeTo(null);
     setVisible (true);
 }

 public static void main (String arg[]) {
     MessageDialog test = new MessageDialog();
     test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 }
}

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