example9_17.java.bak

不错的教程 适合中高级人员的使用

import java.awt.*;
import java.awt.event.*;
public class Example9_17
{
	public static void main(String args[])
   { Win win= new Win();	 
}
}
class Win extends Frame implements Runnable,ActionListener
{  Thread moveOrStop;
   Button 开始,挂起,恢复,终止;
   Label moveLabel;
   boolean move=false,die=false;
   Win()
   {  moveOrStop=new Thread(this);
      开始=new Button("开始");
      挂起=new Button("挂起");
	  恢复=new Button("恢复");
	  终止=new Button("终止");
	  开始.addActionListener(this);
	  挂起.addActionListener(this);
	  恢复.addActionListener(this);
	  终止.addActionListener(this);
	  moveLabel=new Label("线程负责运动我");
	  moveLabel.setBackground(Color.cyan);
	  setLayout(new FlowLayout());
	  add(开始);add(挂起);add(恢复);add(终止);add(moveLabel);
	  setVisible(true);
	  setSize(200,300);
	  validate();
	  addWindowListener(new WindowAdapter()
                      {   public void windowClosing(WindowEvent e)
                           { setVisible(false);
                           }
                      }
                   );
   }
   public void actionPerformed(ActionEvent e)
	{
	   if(e.getSource()==开始)
		{
		  try{move=true;
		      moveOrStop.start();}
		  catch(Exception event){}
	   }
	    else if(e.getSource()==挂起)
		{
		  move=false;		      
	   }
	   else if(e.getSource()==恢复)
		{
		  move=true;	
		  恢复线程();
	   }
	   else if(e.getSource()==终止)
		{
		  die=true;		      
	   }
   }
  
   public void run()
   {  while(true)
	   {
	     while(!move)
		   {
			 try{挂起线程();}
			 catch(InterruptedException e){}
		   }
		 int x=moveLabel.getBounds().x;
		 int y=moveLabel.getBounds().y;
		 y=y+2;
		 if(y>=200) y=10;
		 moveLabel.setLocation(x,y);
		 try{moveOrStop.sleep(200);}
		 catch(InterruptedException e2){}
		 if(die==true)
			 return;	 
      }
  } 
public synchronized void 挂起线程() throws InterruptedException
	{
	   wait();
   }
   public synchronized void 恢复线程() 
	{
	   notifyAll();
   }
 }