第六周

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class Test
{


public static void main(String[] args)
{
JFrame jtfMainFrame = new JFrame("Which Button Demo");
jtfMainFrame.setSize(450, 150);
JPanel jplPanel = new JPanel();
int i;
int j=1;
int num1 , num2;
JButton jbnButton[]  = new JButton[16];
JButton changeButton[] = new JButton[2];
jplPanel.setLayout (new GridLayout(4, 4));
for(i = 0;i<=15;i++){
 jbnButton[i]=new JButton("Button"+(i+1));
 jplPanel.add(jbnButton[i]);
 String s = Integer.toString(i+1);
 jbnButton[i].addActionListener(new ActionListener() {

  public void actionPerformed(ActionEvent e) {

 System.out.println("Button"+s);
   }
  });
}

jtfMainFrame.getContentPane().add(jplPanel, BorderLayout.CENTER);
jtfMainFrame.setVisible(true);
System.out.print("Yang");
}
}