Java Swing and Dialog (JDialog) - Example

JDialog dialog = new JDialog();

public class MyForm  extends JDialog {

package com.java.myapp;

import javax.swing.JDialog;
import javax.swing.JButton;

public class  MyForm {
	
    public static void main(String[] args) {
    	
    	// Dialog
    	JDialog dialog = new JDialog();
    	dialog.setSize(316, 145);
    	dialog.setLocation(300,200);
    	dialog.getContentPane().setLayout(null);
    	
    	// Button
    	JButton btnOk = new JButton("OK");
    	btnOk.setBounds(108, 54, 89, 23);
    	dialog.getContentPane().add(btnOk);
    	dialog.setVisible(true);
    	
    }
    
}

package com.java.myapp;

import javax.swing.JDialog;
import javax.swing.JLabel;

public class MyForm  extends JDialog {
	
	public static void main(String[] args) {
		try {
			MyForm dialog = new MyForm();
			dialog.setVisible(true);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public MyForm() {
		// Constructor
		setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
		setTitle("ThaiCreate.Com Java GUI Tutorial");
		setBounds(100, 100, 359, 174);
		getContentPane().setLayout(null);
		
		// Label
		JLabel label = new JLabel("Welcome to ThaiCreate.Com");
		label.setBounds(86, 37, 175, 29);
		getContentPane().add(label);

	}
}

package com.java.myapp;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;

public class MyForm extends JFrame {

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				MyForm frame = new MyForm();
				frame.setVisible(true);
			}
		});
	}

	/**
	 * Create the frame.
	 */
	public MyForm() {
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 450, 283);
		setTitle("ThaiCreate.Com Java GUI Tutorial");
		getContentPane().setLayout(null);
		
		// Menu Bar
        JMenuBar menuBar=new JMenuBar();
        
        // Menu 1
        JMenu menu = new JMenu("File");
        
        // Open
        JMenuItem menuOpen = new JMenuItem("Open");
        menu.add(menuOpen);
        
        // About Us
        JMenuItem menuAbout = new JMenuItem("About Us");
        menuAbout.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent event) {
            	MyDialog dialog = new MyDialog();
            	dialog.setModal(true);
        		dialog.setVisible(true); 
            }
        });

        menu.add(menuAbout);

        menuBar.add(menu);
        setJMenuBar(menuBar);
	}
	
	//*************** Dialog *****************//
	class MyDialog  extends JDialog {

		public MyDialog() {
			// MyDialog
			setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
			setTitle("About Us");
			setBounds(100, 100, 359, 174);
			getContentPane().setLayout(null);
			
			// Label
			JLabel label = new JLabel("ThaiCreate.Com Version 1.0");
			label.setBounds(86, 37, 175, 29);
			getContentPane().add(label);	
			
		}
	}
	
}

package com.java.myapp;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;


public class MyForm extends JFrame {

	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				MyForm form = new MyForm();
				form.setVisible(true);
			}
		});
	}
	
	public MyForm() {
            
		// Create Form Frame
		super("ThaiCreate.Com Java GUI Tutorial");
		setSize(450, 300);
		setLocation(500, 280);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		getContentPane().setLayout(null);
		
		// Label Result
		final JLabel lblResult = new JLabel("Result",JLabel.CENTER);
		lblResult.setBounds(32, 53, 370, 14);
		getContentPane().add(lblResult);
		
		// Create Button Open Dialog
		JButton btnButton = new JButton("Submit");
		btnButton.setBounds(171, 95, 89, 23);
		btnButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				
				MyDialogPopup dialog = new MyDialogPopup();
				dialog.setModal(true);
				dialog.setVisible(true);
				
				lblResult.setText(dialog.sName);
				
			}
		});
		getContentPane().add(btnButton);
	
	}
	
	//***************** Dialog ****************//
	
	class MyDialogPopup extends JDialog {

		public String sName;

		public MyDialogPopup() {
			setBounds(100, 100, 296, 175);
			setTitle("Input Dialog");
			setLocationRelativeTo(null);
			getContentPane().setLayout(null);
			
			// Create Input 
			final JTextField name = new JTextField();
			name.setBounds(57, 36, 175, 20);
			getContentPane().add(name);
			
			// Button OK
			JButton btnOK = new JButton("OK");
			btnOK.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					sName = name.getText();
					dispose();
				}
			});
			btnOK.setBounds(70, 93, 78, 23);
			getContentPane().add(btnOK);
			
			// Button Cancel
			JButton btnCancel = new JButton("Cancel");
			btnCancel.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					sName = "";
					dispose();
				}
			});
			btnCancel.setBounds(158, 93, 74, 23);
			getContentPane().add(btnCancel);
			
		}
	}
	
}