我有以下课程:
package net.adjava.multithreading; public class MyResource { private int a; public int getA() { return a; } public void setA(int a) { this.a = a; } }
package net.adjava.multithreading; public class Thread1 extends Thread { MyResource m; public Thread1(MyResource m) { super(); this.m = m; } @Override public void run() { System.out.println("Current Thread name1 :" + Thread.currentThread().getName()); for (int i = 0; i < 10000; i++) { m.setA(i); System.out.println("Set method sets the value of a as: " + i); System.out.println("Current Thread name1 :" + Thread.currentThread().getName()); Thread.yield(); } } }
package net.adjava.multithreading; public class Thread2 extends Thread { MyResource m; public Thread2(MyResource m) { super(); this.m = m; } @Override public void run() { System.out.println("Current Thread name2 :" + Thread.currentThread().getName()); for (int i = 0; i < 100; i++) { System.out.println(" value of a as per getter method is :" + m.getA()); System.out.println("Current Thread name2 :" + Thread.currentThread().getName()); } System.out.println("waiting for thread to end"); } }
package net.adjava.multithreading; public class ThreadExecutionPoint { public static void main(String args[]) { System.out.println("Current Thread name main :" + Thread.currentThread().getName()); MyResource m = new MyResource(); Thread1 th1 = new Thread1(m); Thread2 th2 = new Thread2(m); th1.start(); th2.start(); } }
我试图用上面的类来理解yield()的目的.在尝试这个例子之前我所知道的yield()就是它暂停调用它的线程.所以为了测试它我在Thread1类中使用了yield方法.所以基本上根据我的理解,thread1应该执行for循环一次然后应该暂停并等待其他线程完成.但输出显示不同的结果.输出显示第一个thread1被执行然后执行thread2.有人可以纠正我错过的东西吗?或者我对yield()的理解有问题.
解决方法
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