常用API

 给当前线程命名

主线程

package com.itheima.d2;public class ThreadTest1 {public static void main(String[] args) {Thread t1 = new MyThread("子线程1");//t1.setName("子线程1");t1.start();System.out.println(t1.getName());//获得子线程名字Thread t2 = new MyThread("子线程2");//t2.setName("子线程2");t2.start();System.out.println(t2.getName());//获得子线程名字//主线程对象的名字//哪个线程执行它，它就会得到哪个线程的名字Thread m = Thread.currentThread();m.setName("主线程");System.out.println(m.getName());//获得主线程的名字mainfor (int i = 1; i <= 5; i++) {System.out.println(m.getName() + "输出" + i);}}
}

子线程

package com.itheima.d2;public class MyThread extends Thread{public MyThread(String name){super(name);//为当前线程设置名字}@Overridepublic void run() {//哪个线程执行它，它就会得到哪个线程的名字Thread t = Thread.currentThread();for (int i = 1; i <= 5; i++) {System.out.println(t.getName() + "输出" + i);}}
}

join与sleep的用法

package com.itheima.d2;public class ThreadTest2 {public static void main(String[] args) throws Exception {for (int i = 1; i <= 5; i++) {System.out.println(i);//休眠5秒if (i == 3){//让当前执行的程序暂停5秒，再继续执行Thread.sleep(5000);}}//join方法的使用，让当前调用在个方法的线程先执行完Thread t1 = new MyThread("子线程1");t1.start();t1.join();Thread t2 = new MyThread("子线程2");t2.start();t2.join();Thread t3 = new MyThread("子线程3");t3.start();t3.join();}
}