线程学习

 //DeadClass2.java
//
//2009-11-22

//<applet code=DeadClass2 width=200 height=100>
//</applet>

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

public class DeadClass2 extends JApplet
{
 JTextField txt1=new JTextField(5);
 JTextField txt2=new JTextField(5);
 JTextField txt3=new JTextField(10);
 JButton countButton=new JButton("Begin");
 JButton compareButton=new JButton("Compare");

 class  CountThread extends Thread
 {
  int count1=0;
  int count2=0;
  int count;
  boolean flag;
  public void run(){

   while (true)
   {
    txt1.setText(Integer.toString(count1++));
    txt2.setText(Integer.toString(count2--));
    try
    {
     sleep(1000);
    }
    catch (InterruptedException e){}
   }
  }

  public void countUnEquals(){
   if (count1!=count2)
   {
    txt3.setText("Unequal"+Integer.toString(++count)+"times");
    flag=false;
   }
   if (flag==true)
   {
    txt2.setText("the count 1 equals to count2");
   }
  }
 }
 class CompareThread extends Thread
 {
  public void run(){
   if (countT!=null)
   {

    while (true)
    {
     countT.countUnEquals();
     try
     {
      sleep(1000);
     }
     catch (InterruptedException e){}
    }
   }
   
  }

 }
 CountThread countT;
 CompareThread compareT;

 class CountButtonLis implements ActionListener
 {
  public void actionPerformed(ActionEvent e){
   if (countT==null)
   {
    countT=new CountThread();
    countT.start();
   }

  }
 }

 class CompareButtonLis implements ActionListener
 {
  public void actionPerformed(ActionEvent e){
   if (compareT==null)
   {
    compareT=new CompareThread();
    compareT.start();
   }
  }
 }

 public void init(){
  Container cp=getContentPane();
  cp.setLayout(new FlowLayout());
  cp.add(txt1);
  cp.add(txt2);
  cp.add(txt3);
  cp.add(countButton);
  cp.add(compareButton);
  countButton.addActionListener(new CountButtonLis());
  compareButton.addActionListener(new CompareButtonLis());
 }

 

 
}