check botton

//import javax.swing.*; 
import java.awt.*;
import java.awt.event.*;  // 要處理事件必須 import 此套件 
   
public class Work2 extends Frame  
implements ActionListener
{ 
   
  /** 
   * @param args 
   */
 //int act = 0; // 用來記錄按鈕被次數的變數 
   int SizeW = 2100; 
   int SizeH = 700; 
 
  public static void main(String[] args)
{ 
   //Work2 test = new Work2(); 
  Frame frame= new Frame("Checkbox");
    Checkbox check=new Checkbox("4");
frame.add(check);
    Checkbox check1=new Checkbox("3");
 frame.add(check1);
  
 // Frame frame=new Frame("Button Frame");
Button button1 = new Button("2");
frame.add(button1);
frame.setLayout(new FlowLayout());
Button button2 = new Button("1");
 frame.add(button2);
frame.setLayout(new FlowLayout());
frame.setSize(600,300);
frame.setVisible(true);
    frame.addWindowListener(new WindowAdapter(){
  public void windowClosing(WindowEvent e){
    System.exit(0);
  }
    });
 
  } 

  

  
// 用建構方法來建立元件、將元件加入視窗、顯示視窗 
  //public Work2()
{ 
  //setTitle("Listener 示範");    // 設定視窗標題 
  //JButton mybutton = new JButton("換個標題"); 
   
// 通知按鈕物件：本物件要當傾聽者 
   //mybutton.addActionListener(this); 
  
    //getContentPane().add(mybutton); 
   //setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    //setSize(SizeW,SizeH); 
    //setVisible(true); 
 } 
  
   public void actionPerformed(ActionEvent e)
 { 
  //SizeW = (int) (SizeW * 0.5); 
//SizeH = (int) (SizeH * 0.5);   
  //setSize(SizeW,SizeH); 
  } 
   
}