三个线程交互打印
2022-03-02 本文已影响0人
xiaohei_e853
package test;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.ReentrantLock;
public class SequencePrintNumber {
public static void main(String[] args) {
ReentrantLock reentrantLock = new ReentrantLock();
Condition condition1 = reentrantLock.newCondition();
Condition condition2 = reentrantLock.newCondition();
Condition condition3 = reentrantLock.newCondition();
AtomicInteger atomicInteger = new AtomicInteger();
new Thread("A"){
@Override
public void run() {
super.run();
for (int i = 0; i < 10; i++) {
try{
reentrantLock.lock();
int count = atomicInteger.get();
if(count%3!=0){
condition1.await();
}
System.out.println(Thread.currentThread().getName()+"111");
atomicInteger.getAndAdd(1);
condition2.signal();
}catch (Exception e){
}finally {
reentrantLock.unlock();
}
}
}
}.start();
new Thread("B"){
@Override
public void run() {
super.run();
for (int i = 0; i < 10; i++) {
try{
reentrantLock.lock();
int count = atomicInteger.get();
if(count%3!=1){
condition2.await();
}
System.out.println(Thread.currentThread().getName()+"222");
atomicInteger.getAndAdd(1);
condition3.signal();
}catch (Exception e){
}finally {
reentrantLock.unlock();
}
}
}
}.start();
new Thread("C"){
@Override
public void run() {
super.run();
for (int i = 0; i < 10; i++) {
try{
reentrantLock.lock();
int count = atomicInteger.get();
if(count%3!=2){
condition3.await();
}
System.out.println(Thread.currentThread().getName()+"333");
atomicInteger.getAndAdd(1);
condition1.signal();
}catch (Exception e){
}finally {
reentrantLock.unlock();
}
}
}
}.start();
}
}
