Java并发编程：线程同步与条件变量实践
本文展示了如何使用Java并发库中的ReentrantLock和Condition进行线程间的同步与通信。通过SumThread类的add和reduce方法，演示了在多线程环境下如何保证数据的一致性。在main方法中创建了两个线程，一个负责增加计数，另一个负责减少计数，确保在并发场景下正确执行。
package com.mybatis.mybatisplus.thread;/*
* @author allen
* @version v1.0
*/
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class ThreadWait {
public static void main(String[] args) {
SumThread sumThread=new SumThread();
new Thread(()->{
for (int i = 0; i <10 ; i++) {
try {
sumThread.add();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
new Thread(()->{
for (int i = 0; i <10 ; i++) {
try {
sumThread.reduce();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
}
}
class SumThread{
Lock lock=new ReentrantLock();
Condition condition = lock.newCondition();
private int count=0;
public void add() throws InterruptedException {
lock.lock();
try{
while (count==1){
condition.await();
}
count++;
condition.signalAll();
System.out.println(count);
}
finally {
lock.unlock();
}
}
public synchronized void reduce() throws InterruptedException {
lock.lock();
try{
while (count==0){
condition.await();
}
count--;
condition.signalAll();
System.out.println(count);
}
finally {
lock.unlock();
}
}
}
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