线程等待唤醒(等待通知)机制

ublic class WaitTest {
private static Object lock = new Object();
private static boolean flag = true;


public static void main(String[] args) {
new Thread(new Runnable() {
@Override
public void run() {
synchronized (lock){
while (flag){
try {
System.out.println("wait start .......");
lock.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}


System.out.println("wait end ....... ");
}
}
}).start();


new Thread(new Runnable() {
@Override
public void run() {
if (flag){
synchronized (lock){
if (flag){
lock.notify();
System.out.println("notify .......");
flag = false;
}


}
}
}
}).start();
}
}

public class LockSupportTest {


public static void main(String[] args) {
Thread parkThread = new Thread(new ParkThread());
parkThread.start();


System.out.println("唤醒parkThread");
LockSupport.unpark(parkThread);
}


static class ParkThread implements Runnable{


@Override
public void run() {
System.out.println("ParkThread开始执行");
LockSupport.park();
System.out.println("ParkThread执行完成");
}
}
}