Thread.yield()方法表示交出主动权，join表示等待当前线程，可以指定秒数

Thread.yield()方法表示交出主动权，join表示等待当前线程，可以指定秒数

学习了：http://www.importnew.com/14958.html 膜拜一下

源码膜拜：

Thread.yield()没准，顺序输出不一定；

package com.stono.thread;

public class YieldExample {
public static void main(String[] args) {
Thread producer = new Producer();
Thread consumer = new Consumer();
producer.setPriority(Thread.MIN_PRIORITY);
consumer.setPriority(Thread.MAX_PRIORITY);
producer.start();
consumer.start();
}
}

class Producer extends Thread{
@Override
public void run() {
for(int i=0;i<5;i++){
System.out.println("I am Producer: Procuded Item ============="+ i);
Thread.yield();
}
}
}

class Consumer extends Thread{
@Override
public void run() {
for(int i=0;i<5;i++){
System.out.println("I am consumer: Consumed Item "+i);
Thread.yield();
}

}
}

Join表示要等待当前线程，可以指定等待的毫秒数；

package com.stono.thread;

import java.util.concurrent.TimeUnit;

public class JoinExample {
public static void main(String[] args) throws InterruptedException {
Thread t = new Thread(new Runnable() {
public void run() {
System.out.println("First task started");
System.out.println("Sleeping for 2 seconds");
try {
//Thread.sleep(2000);
TimeUnit.SECONDS.sleep(2);
} catch (Exception e) {
e.printStackTrace();
}
System.out.println("First task complete");
}
});

Thread t1 = new Thread(new Runnable() {
public void run() {
System.out.println("Second task completed");
}
});

t.start();
t.join();
// t.join(100); // 这个表示等待100毫秒
t1.start();
}
}