package lock;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
/**
* @author Mr.Zhao
* @Description: 资源类
* @date 2019/12/26 20:22
* @version 1.0
*/
class ShareResource{
/**
* @author Mr.Zhao
* @Description: 1:A,2:B,3:C
* @date 2019/12/26 20:27
* @version 1.0
*/
private int number = 1;
private Lock lock = new ReentrantLock();
private Condition c1 = lock.newCondition();
private Condition c2 = lock.newCondition();
private Condition c3 = lock.newCondition();
public void printA(int i) {
lock.lock();
try {
while (number != 1) {
c1.await();
}
for (int j = 0; j < i; j++) {
System.out.println(Thread.currentThread().getName() + "打印:" + j);
}
number = 2;
c2.signal();
} catch (Exception e) {
e.printStackTrace();
} finally {
lock.unlock();
}
}
public void printB(int i) {
lock.lock();
try {
while (number != 2) {
c2.await();
}
for (int j = 0; j < i; j++) {
System.out.println(Thread.currentThread().getName() + "打印:" + j);
}
number = 3;
c3.signal();
} catch (Exception e) {
e.printStackTrace();
} finally {
lock.unlock();
}
}
public void printC(int i) {
lock.lock();
try {
while (number != 3) {
c3.await();
}
for (int j = 0; j < i; j++) {
System.out.println(Thread.currentThread().getName() + "打印:" + j);
}
number = 1;
c1.signal();
} catch (Exception e) {
e.printStackTrace();
} finally {
lock.unlock();
}
}
}
/**
* @author Mr.Zhao
* @version 1.0
* @Description: A打印5次,调用B打印10次,调用C打印15次,循环十遍
* @date 2019/12/26 20:21
*/
public class SyncAndReentrantLockDemo {
public static void main(String[] args) {
ShareResource shareResource = new ShareResource();
new Thread(()->{
for (int i = 0; i < 10; i++) {
shareResource.printA(5);
}
},"A").start();
new Thread(()->{
for (int i = 0; i < 10; i++) {
shareResource.printB(10);
}
},"B").start();
new Thread(()->{
for (int i = 0; i < 10; i++) {
shareResource.printC(15);
}
},"C").start();
}
}
【附源码带注释】创建三个线程,Lock精确唤醒,A打印5次,调用B打印10次,调用C打印15次,循环十遍
猜你喜欢
转载自blog.csdn.net/nbcsdn/article/details/103722329
今日推荐
周排行