import javax.swing.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.*;

public class GridLayoutDemo extends JFrame {
  public GridLayoutDemo () {
    super();
    setSize(400, 150);
    setTitle("GridLayout Demo");
    setLayout(new GridLayout(3,2));
    setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
    
    ButtonListener listener = new ButtonListener();
    JButton close1 = new JButton("Close 1");
    close1.addActionListener( listener );
    add(close1);
    
    JButton close2 = new JButton("Close 2");
    close2.addActionListener( listener );
    add(close2);
    
    JButton close3 = new JButton("Close 3");
    close3.addActionListener( listener );
    add(close3);
    
    JButton close4 = new JButton("Close 4");
    close4.addActionListener( listener );
    add(close4);
    
    JButton close5 = new JButton("Close 5");
    close5.addActionListener( listener );
    add(close5);
    
    JButton close6 = new JButton("Close 6");
    close6.addActionListener( listener );
    add(close6);
    
    JButton close7 = new JButton("Close 7");
    close7.addActionListener( listener );
    add(close7);
  }
  
  public class ButtonListener implements ActionListener {
    public void actionPerformed(ActionEvent e) {
      System.out.println(e);
      System.exit(1);
    }
  }
  
  public static void main(String[] args) {
    GridLayoutDemo w = new GridLayoutDemo();
    w.setVisible(true);
  }
}