线程yield()

public class TestYield {
	public static void main(String[] args) {
		Runnable4 r4 = new Runnable4("r4");
		Runnable4 r5 = new Runnable4("r5");
		
		r4.start();
		r5.start();
		
		
	}
}

public class Runnable4 extends Thread {
	public Runnable4(String s) {
		super(s); 
	}
	
	public void run() {
		for(int i=0;i<30;i++) {
			System.out.println(getName() + ": " + i);
			
			if(i%10==0) {
				yield(); //让出线程执行
			}
		}
	}
}