手写死锁线程

时间：2019-04-26 22:20:03 阅读：167 评论：0 收藏：0 [点我收藏+]

发生死锁的原因：多个线程已经占有一个资源还要争夺互相之间手中的资源（资源就是指被上锁的内容）

死锁线程代码

package com.wang;


import java.util.concurrent.TimeUnit;

class holdlock implements Runnable {
    String lockA;
    String lockB;

    public holdlock(String lockA, String lockB) {
        this.lockA = lockA;
        this.lockB = lockB;
    }

    @Override
    public void run() {
        synchronized (lockA) {
            System.out.println("已经获得锁" + lockA + "，尝试获得锁" + lockB);
            try {
                TimeUnit.SECONDS.sleep(3);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            synchronized (lockB) {
                System.out.println("已经持有锁" + lockB + ",尝试获取锁" + lockA);
            }
        }
    }
}

public class deadlockdemo {
    public static void main(String[] args) {
        String lockA = "locka";
        String lockB = "lockb";
        new Thread(new holdlock(lockA, lockB)).start();
        new Thread(new holdlock(lockB, lockA)).start();

    }
}