java之多线程调度

public class ThreadTest09 {
    public static void main(String[] args) {

        //看看优先级别，优先级级别高只是抢占到cpu的时间片相对多一些
        System.out.println("最高优先级："+ Thread.MAX_PRIORITY);
        System.out.println("最低优先级："+ Thread.MIN_PRIORITY);
        System.out.println("默认优先级："+ Thread.NORM_PRIORITY);

        Thread t = new Thread(new MyRunnable9());
        t.setName("t");
        //给t线程设置优先级，设置成最高的，大概率是t先执行的多
        t.setPriority(10);
        t.start();

        System.out.println(Thread.currentThread().getName()+ "的优先级是:" + Thread.currentThread().getPriority());
        for(int i =0 ;i<1000;i++){
            System.out.println(Thread.currentThread().getName() +"---》" + i);
        }
    }
}

class MyRunnable9 implements Runnable{
    public void run() {
        System.out.println(Thread.currentThread().getName()+ "的优先级是:" + Thread.currentThread().getPriority());

        for(int i =0 ;i<1000;i++){
            System.out.println(Thread.currentThread().getName() +"---》" + i);
        }
    }
}

public class ThreadTest10 {
    public static void main(String[] args) {

        Thread t = new Thread(new MyRunnable10());
        t.setName("t");
        t.start();

        for(int i = 1 ; i<=10000; i++){
            System.out.println(Thread.currentThread().getName() +"---》" + i);
        }
    }
}


class MyRunnable10 implements Runnable{
    public void run() {

        //每100次让一下
        for(int i = 1 ; i<=10000; i++){
            if(i%100 == 0){
                Thread.yield(); //当前线程让给主线程
            }
            System.out.println(Thread.currentThread().getName() +"---》" + i);
        }
    }
}

public class ThreadTest11 {
    public static void main(String[] args) {
        System.out.println("main begin");

        Thread t = new Thread(new MyRunnable11());
        t.setName("t");

        t.start();

        try {
            t.join();  //t合并到当前线程，当前线程受阻，t线程执行直到结束。  栈并没有合并，只是调度，协调一下
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        System.out.println("main over");
    }
}


class MyRunnable11 implements Runnable{
    public void run() {

        for(int i =0 ;i<100;i++){
            System.out.println(Thread.currentThread().getName() +"---》" + i);
        }
    }
}