import java.awt.*;
import javax.swing.*;
public class GlueAndStrut {
private JFrame frame;
private Box b1,b2,b3,b4;
public static void main(String args[]) {
GlueAndStrut that = new GlueAndStrut();
that.go();
}
void go() {
frame = new JFrame("Glue And Strut example");
Container contentPane = frame.getContentPane();
contentPane.setLayout(new GridLayout(4,1));

b1 = Box.createHorizontalBox();
b1.add(new JLabel("Box 1,"));
b1.add(new JButton("Yes"));
b1.add(new JButton("No"));
b1.add(new JButton("Cancel"));

b2 = Box.createHorizontalBox();
b2.add(new JLabel("Box 2,"));
b2.add(new JButton("Yes"));
b2.add(new JButton("No"));
b2.add(Box.createHorizontalGlue());
b2.add(new JButton("Cancel"));
b3 = Box.createHorizontalBox();
b3.add(new JLabel("Box 3,"));
b3.add(new JButton("Yes"));
b3.add(new JButton("No"));
b3.add(Box.createHorizontalStrut(20));
b3.add(new JButton("Cancel"));

b4 = Box.createHorizontalBox();
b4.add(new JLabel("Box 4,"));
b4.add(new JButton("Yes"));
b4.add(new JButton("No"));
b4.add(Box.createRigidArea(new Dimension(50,90)));
b4.add(new JButton("Cancel"));

contentPane.add(b1);
contentPane.add(b2);
contentPane.add(b3);
contentPane.add(b4);

frame.setSize(300,200 );
frame.setVisible(true);
}
}