实现3个线程之间依次执行
比如有3个线程A,B,C ,需要按照顺序执行，ABC,ABC 依次执行。
这个使用可以使用 Lock 的 conditional来实现线程之间精准通讯。
package com.study.juc;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
/**
* 功能: TODO
*
* @author ASUS
* @date 2023/11/25 22:40
*/
public class ConditionalDemo {
public static void main(String[] args) {
Data data=new Data();
new Thread(()->{
for(int i=0;i<10;i++){
data.printA();
}
},"A").start();
new Thread(()->{
for(int i=0;i<10;i++){
data.printB();
}
},"B").start();
new Thread(()->{
for(int i=0;i<10;i++){
data.printC();
}
},"C").start();
}
}
class Data{
private Lock lock=new ReentrantLock();
private Condition condition1=lock.newCondition();
private Condition condition2=lock.newCondition();
private Condition condition3=lock.newCondition();
private int number=1;
public void printA(){
lock.lock();
try {
while (number!=1){
condition1.await();
}
//业务代码
System.err.println(Thread.currentThread().getName()+"->AAA");
number=2;
condition2.signal();
}
catch (Exception ex){
ex.printStackTrace();
}
finally {
lock.unlock();
}
}
public void printB(){
lock.lock();
try {
while (number!=2){
condition2.await();
}
System.err.println(Thread.currentThread().getName()+"->BBB");
number=3;
condition3.signal();
}
catch (Exception ex){
ex.printStackTrace();
}
finally {
lock.unlock();
}
}
public void printC(){
lock.lock();
try {
while (number!=3){
condition3.await();
}
System.err.println(Thread.currentThread().getName()+"->CCC");
number=1;
condition1.signal();
}
catch (Exception ex){
ex.printStackTrace();
}
finally {
lock.unlock();
}
}
}