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Sleep():在指定的毫秒数内让当前正在执行的线程休眠

调用sleep方法时使当前的线程进入休眠状态(阻塞状态)设定休眠xxxx毫秒数后进入运行状态

同步块中的Sleep方法调用 不会释放对象锁但调用wait()方法会释放对象的同步锁

package com.test.thread;public class TestRunnable implements Runnable {@Overridepublic synchronized void run() {for (int i = 0; i < 6; i++) {if (i % 2 == 0) {try {System.out.println(Thread.currentThread().getName());Thread.sleep(2000);} catch (InterruptedException e) {e.printStackTrace();}}}}}

package com.test.thread;public class TestMain {public static void main(String[] args) {TestRunnable runnable_01=new TestRunnable();Thread thread1=new Thread(runnable_01, "runnable_01");thread1.start();}}