8.礼让线程

yield()
让出cpu时间片

礼让线程效果不太明显，多次执行以观察。

public class Demo06Yield {
    public static void main(String[] args) {
        new MyThread().start();
        new MyThread().start();
    }
}
class MyThread extends Thread {
    @Override
    public void run() {
        for(int i = 1; i <= 1000; i++) {
            System.out.println(getName() + " - before    yield - " + i);
            if(i % 10 == 0) {
                //让出CPU
                System.out.println(getName() + "            yield - " + i);
                Thread.yield();
            }
            System.out.println(getName() + " - after    yield - " + i);
        }
    }
}