java 多线程-yield礼让

yield
礼让线程，让当前正在执行的线程暂停而不是阻塞线程
将线程从运行状态转入就绪状态
让cpu调度器重新调度

public class n {

public static void main(String[]args)
{
    test t =new test();
    new Thread(t,"a").start();
    new Thread(t,"b").start();

}

}

class test implements Runnable{

public void run()
{
    System.out.println(Thread.currentThread().getName()+"-->start");
    Thread.yield();//礼让
    System.out.println(Thread.currentThread().getName()+"-->end");
}
}

例2：

public class n {

public static void main(String[]args)
{
    new Thread(()->
     {
        for(int i=0;i<5;i++)
        {
            System.out.println("a"+i);
        }
    }).start();

    for(int i=0;i<5;i++)
    {
        if(i%2==0)
        {
            Thread.yield();
        }
        System.out.println("b"+i);
    }
}

}