Java线程让步_动力节点Java学院整理

// YieldTest.java的源码
 class ThreadA extends Thread{
   public ThreadA(String name){ 
     super(name); 
   } 
   public synchronized void run(){ 
     for(int i=0; i <10; i++){ 
       System.out.printf("%s [%d]:%d\n", this.getName(), this.getPriority(), i); 
       // i整除4时，调用yield
      if (i%4 == 0)
         Thread.yield();
     } 
   } 
 } 
 public class YieldTest{ 
   public static void main(String[] args){ 
     ThreadA t1 = new ThreadA("t1"); 
    ThreadA t2 = new ThreadA("t2"); 
     t1.start(); 
    t2.start();
   } 
 } 

// YieldLockTest.java 的源码
 public class YieldLockTest{ 
   private static Object obj = new Object();
   public static void main(String[] args){ 
     ThreadA t1 = new ThreadA("t1"); 
     ThreadA t2 = new ThreadA("t2"); 
     t1.start(); 
     t2.start();
   } 
   static class ThreadA extends Thread{
     public ThreadA(String name){ 
       super(name); 
     } 
     public void run(){ 
       // 获取obj对象的同步锁
       synchronized (obj) {
         for(int i=0; i <10; i++){ 
           System.out.printf("%s [%d]:%d\n", this.getName(), this.getPriority(), i); 
           // i整除时，调用yield
          if (i%4 == 0)
             Thread.yield();
         }
       }
     } 
   } 
 }