import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Buttonexperiment extends JFrame{
public static void main(String[] args) {
Buttonexperiment be = new Buttonexperiment();
be.setLocationRelativeTo(null);
be.setVisible(true);
be.setResizable(true);
be.setDefaultCloseOperation(EXIT_ON_CLOSE);
}
public Buttonexperiment()
{
JPanel panel1 = new JPanel(new GridLayout(3,1,0,10));
JPanel panel2 = new JPanel(new GridLayout(2,1,0,10));
JButton button1 = new JButton("Button1");
JButton button2 = new JButton("Button2");
panel2.add(button1);
panel2.add(button2);
JPanel panel3 = new JPanel(new GridLayout(2,1,0,20));
JButton button3 = new JButton("Button3");
JButton button4 = new JButton("Button4");
panel3.add(button3);
panel3.add(button4);
JPanel panel4 = new JPanel(new GridLayout(2,1,0,30));
JButton button5 = new JButton("Button5");
JButton button6 = new JButton("Button6");
panel4.add(button5);
panel4.add(button6);
panel1.add(panel2);
panel1.add(panel3);
panel1.add(panel4);
add(panel1);
pack();
}
}