// This code example is created for educational purpose
// by Thorsten Thormaehlen (contact: www.thormae.de).
// It is distributed without any warranty.

import javax.swing.*;
import java.awt.Container;
import java.awt.GridLayout;

class MyGui extends JFrame{
  public void createGUI() {
    setTitle("HelloGUI");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(320, 240);

    Container contentPane = getContentPane();
    contentPane.setLayout(new GridLayout(3, 2, 5, 15));
    contentPane.add(new JButton("Button 1"));
    contentPane.add(new JButton("Button 2"));
    contentPane.add(new JButton("Button 3"));
    contentPane.add(new JButton("Button 4"));
    contentPane.add(new JButton("Button 5"));
    contentPane.add(new JButton("Button 6"));
    
    setVisible(true);
  }
}

public class MyGridLayout {
  public static void main(String[] args) {
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        MyGui myGUI = new MyGui();
        myGUI.createGUI();
      }
    });
  }
}