Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.Component;
import java.awt.FlowLayout;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class Main extends JFrame {
    public Main() throws HeadlessException {
        setSize(200, 200);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JButton button1 = new JButton("Message dialog");
        button1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog((Component) e.getSource(), "Thank you!");
            }
        });

        JButton button2 = new JButton("Input dialog");
        button2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String text = JOptionPane.showInputDialog((Component) e.getSource(), "What is your name?");
                if (text != null && !text.equals("")) {
                    JOptionPane.showMessageDialog((Component) e.getSource(), "Hello " + text);
                }
            }
        });

        JButton button3 = new JButton("Yes no dialog");
        button3.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                int result = JOptionPane.showConfirmDialog((Component) e.getSource(), "Close this application?");
                if (result == JOptionPane.YES_OPTION) {
                    System.exit(0);
                } else if (result == JOptionPane.NO_OPTION) {
                    System.out.println("Do nothing");
                }
            }
        });

        setLayout(new FlowLayout(FlowLayout.CENTER));
        getContentPane().add(button1);
        getContentPane().add(button2);
        getContentPane().add(button3);
    }

    public static void main(String[] args) {
        new Main().setVisible(true);
    }
}