Java Java.lang.Thread.yield()用法及代码示例

描述

这个java.lang.Thread.yield() 方法使当前正在执行的线程对象暂时暂停并允许其他线程执行。

声明

以下是声明java.lang.Thread.yield() 方法

public static void yield()

参数

NA

返回值

此方法不返回任何值。

异常

示例

下面的例子展示了 java.lang.Thread.yield() 方法的用法。

package com.tutorialspoint;

import java.lang.*;

public class ThreadDemo implements Runnable {

   Thread t;

   ThreadDemo(String str) {

      t = new Thread(this, str);
      // this will call run() function
      t.start();
   }

   public void run() {

      for (int i = 0; i < 5; i++) {
         // yields control to another thread every 5 iterations
         if ((i % 5) == 0) {
            System.out.println(Thread.currentThread().getName() + "
            yielding control...");

            /* causes the currently executing thread object to temporarily 
            pause and allow other threads to execute */
            Thread.yield();
         }
      }

      System.out.println(Thread.currentThread().getName() + " has finished executing.");
   }

   public static void main(String[] args) {
      new ThreadDemo("Thread 1");
      new ThreadDemo("Thread 2");
      new ThreadDemo("Thread 3");
   }
}

让我们编译并运行上面的程序，这将产生以下结果——

Thread 1 is yielding control...
Thread 2 is yielding control...
Thread 3 is yielding control...
Thread 1 has finished executing.
Thread 2 has finished executing.
Thread 3 has finished executing.