package concurrent;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.ReentrantLock;
/**
* Auth: zhouhongliang
* Date：2019/8/1
* 线程等待与唤醒机制 Condition
* 按指定顺序执行线程
*/
public class ConditionDemo {
public static void main(String[] args) {
//声明重入锁
ReentrantLock reentrantLock = new ReentrantLock();
//声明Condition对象
final Condition condition1 = reentrantLock.newCondition();
final Condition condition2 = reentrantLock.newCondition();
final Condition condition3 = reentrantLock.newCondition();
new Thread(() -> {
//加锁
reentrantLock.lock();
try {
//等待
condition1.await();
System.out.println("AA");
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
//解锁
reentrantLock.unlock();
}
}).start();
new Thread(() -> {
reentrantLock.lock();
try {
condition2.await();
System.out.println("BB");
condition1.signal();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
reentrantLock.unlock();
}
}).start();
new Thread(() -> {
reentrantLock.lock();
try {
condition3.await();
System.out.println("CC");
condition2.signal();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
reentrantLock.unlock();
}
}).start();
new Thread(() -> {
reentrantLock.lock();
try {
System.out.println("DD");
//唤醒
condition3.signal();
} catch (Exception e) {
e.printStackTrace();
} finally {
reentrantLock.unlock();
}
}).start();
}
}
输出结果：
DD
CC
BB
AA
Process finished with exit code 0
原文：https://blog.51cto.com/11147669/2425610