Java Group Layout (GroupLayout) - Example

GroupLayout groupLayout = new GroupLayout(getContentPane());

package com.java.myapp;

import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.LayoutStyle.ComponentPlacement;

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, 458, 287);
		setTitle("ThaiCreate.Com GUI Tutorial");
		
		JButton btn1 = new JButton("Button 1");
		
		JButton btn2 = new JButton("Button 2");
		
		JButton btn3 = new JButton("Button 3");
		
		GroupLayout groupLayout = new GroupLayout(getContentPane());
		groupLayout.setHorizontalGroup(
			groupLayout.createParallelGroup(Alignment.LEADING)
				.addGroup(groupLayout.createSequentialGroup()
					.addGap(34)
					.addGroup(groupLayout.createParallelGroup(Alignment.LEADING)
						.addGroup(groupLayout.createSequentialGroup()
							.addComponent(btn1)
							.addPreferredGap(ComponentPlacement.RELATED, 196, Short.MAX_VALUE)
							.addComponent(btn3)
							.addGap(34))
						.addGroup(groupLayout.createSequentialGroup()
							.addComponent(btn2)
							.addContainerGap(319, Short.MAX_VALUE))))
		);
		groupLayout.setVerticalGroup(
			groupLayout.createParallelGroup(Alignment.LEADING)
				.addGroup(groupLayout.createSequentialGroup()
					.addGap(30)
					.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE)
						.addComponent(btn1)
						.addComponent(btn3))
					.addPreferredGap(ComponentPlacement.UNRELATED)
					.addComponent(btn2)
					.addContainerGap(162, Short.MAX_VALUE))
		);
		getContentPane().setLayout(groupLayout);
		
	}
}