countertest.java

来自「java课件 java课件 java课件 java课件」· Java 代码 · 共 40 行

class Num{
	private int x=0;
	private int y=0;
	synchronized void increase(){
		x++;
		y++;
	    }
	synchronized void testEqual(){
	  	System.out.println(x+","+y+":"+(x==y));
	}
}

class Counter extends Thread{
private Num num;
Counter(Num num){
  this.num=num;	
}
public void run(){
while(true){
  num.increase();
}
}
}

public class CounterTest{
public static void main(String[] args){
	Num num = new Num();
	Thread count1 = new Counter(num);
	Thread count2 = new Counter(num);
	count1.start();
	count2.start();
	for(int i=0;i<100;i++){
	  num.testEqual();
		try{
		  Thread.sleep(100);
		}catch(InterruptedException e){ }
    }
   }
}