多见线程方法

本节的类代码可以查看上一节的类代码

线程暂停

Thread.sleep(1000);//暂停1000毫秒

这就有点像在时间里面学习的*sleep()*函数了

package multiThread2;public class main {public static void main(String[] args) {Animal a1 = new Animal("张三",18);Animal a2 = new Animal("旺财",3);
//        Thread t1 = new Thread(){
//            public void run(){
//                for (int i = 0; i < 10; i++) {
//                    System.out.println(a1);
//                }
//            }
//        };
//        t1.start();Thread t2 = new Thread(() -> {int second=0;for (int i = 0; i < 10; i++) {try {Thread.sleep(1000);
//                    System.out.println(a2);}catch (Exception e){e.printStackTrace();}System.out.println(second++);}});t2.start();}
}

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加入到当前线程

t.join()

主要作用是将多个线程分开，成为多个进程，只有完成了前一个进程才能进行下一个进程

package multiThread2;public class main {public static void main(String[] args) throws InterruptedException {Animal a1 = new Animal("张三",18);Animal a2 = new Animal("旺财",3);Thread t1 = new Thread(){public void run(){for (int i = 0; i < 10; i++) {System.out.println(a1);}}};t1.start();t1.join();Thread t2 = new Thread(() -> {int second=0;for (int i = 0; i < 10; i++) {try {Thread.sleep(1000);System.out.println(a2);}catch (Exception e){e.printStackTrace();}System.out.println(second++);}});t2.start();}
}

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这次图片有点大

线程的优先级

t.setPriority(int)

优先级从最大为10，一直到最小为1
为了方便，设计了

Thread.MAX_PRIORITY
Thread.MIN_PRIORITY

但是优先级只是一个相对的优先，优先级更大的只是更大几率占据了CPU的资源，而不是全部占据，这就导致可能优先级更低的线程会先进行完,
这也是它与join方法的主要区别

package multiThread2;public class main {public static void main(String[] args) throws InterruptedException {Animal a1 = new Animal("张三",18);Animal a2 = new Animal("旺财",3);Thread t1 = new Thread(() -> {for (int i = 0; i < 10; i++) {System.out.println(a1);}});Thread t2 = new Thread(() -> {for (int i = 0; i < 10; i++) {System.out.println(a2);}});t1.setPriority(Thread.MAX_PRIORITY);t2.setPriority(Thread.MIN_PRIORITY);t1.start();t2.start();}
}

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临时暂停

t.yield();

当前线程，临时暂停，使得其他线程可以有更多的机会占用CPU资源

package multiThread2;public class main {public static void main(String[] args) throws InterruptedException {Animal a1 = new Animal("张三",18);Animal a2 = new Animal("旺财",3);Thread t1 = new Thread(() -> {for (int i = 0; i < 10; i++) {System.out.println(a1);}});Thread t2 = new Thread(() -> {for (int i = 0; i < 10; i++) {Thread.yield();System.out.println(a2);}});t1.start();t2.start();}
}

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