[Java知识库]juc-阻塞原语：LockSupport

package com.atguigu.javademo.juc;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.LockSupport;

public class JUCDEmo2 {
public static void main(String[] args) {
Thread mainThread = Thread.currentThread() ;
System.out.println(“主线程等待”);
new Thread(()->{
try{
System.err.println(“子线程执行。。。”);
TimeUnit.SECONDS.sleep(3);
System.err.println(“子线程执行完。。。”);
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
LockSupport.unpark(mainThread);//解锁主线程
}
}).start();
LockSupport.park();//主线程暂停，等待
System.out.println(“主线程再执行”);
}
}