代码-JavaSE-多线程-一个死锁示例

package ceshi.duoxiancheng.sisuo;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class Demo {
    public static void main(String[] args) {
 RunnableA_1 r1 = new RunnableA_1();
 RunnableA_2 r2 = new RunnableA_2();

 Thread t1 = new Thread(r1);
 Thread t2 = new Thread(r2);

 t1.start();
 t2.start();
 }

}

class A {
 final static Lock LOCK1=new ReentrantLock();
 final static Lock LOCK2=new ReentrantLock();

 static void show1() {
 LOCK1.lock();
 {
 LOCK2.lock();
 System.out.println("show1..");
 LOCK2.unlock();
 }
 LOCK1.unlock();
 }

 static void show2() {
 LOCK2.lock();
 {
 LOCK1.lock();
 System.out.println("show2...");
 LOCK1.unlock();
 }
 LOCK2.unlock();
 }
}

class RunnableA_1 implements Runnable {
 public void run() {
 while (true) {
 A.show1();
 }
 }
}

class RunnableA_2 implements Runnable {
 public void run() {
 while (true) {
 A.show2();
 }
 }
}