Java中的死锁

死锁：不会出现异常，也不会出现错误，程序一直僵持在那里。

代码语言：javascript复制

package com.java;

public class DeadLock {
    public static void main(String[] args) {
        Object o1 = new Object();
        Object o2 = new Object();
        //让两个线程共享两个对象
        Thread t1 = new MyThread1(o1,o2);
        Thread t2 = new MyThread2(o1,o2);
        t1.start();
        t2.start();
    }
}

class MyThread1 extends Thread {
    Object o1;
    Object o2;

    public MyThread1(Object o1, Object o2) {
        this.o1 = o1;
        this.o2 = o2;
    }

    public void run() {
        synchronized (o1) {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            synchronized (o2) {
            }
        }
    }
}

class MyThread2 extends Thread {
    Object o1;
    Object o2;

    public MyThread2(Object o1, Object o2) {
        this.o1 = o1;
        this.o2 = o2;
    }

    public void run() {
        synchronized (o2) {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            synchronized (o1) {
            }
        }
    }
}

故Java中synchronized在开发中最好不要嵌套使用，一不小心就会导致死锁。

java synchronized 程序 开发

0 人点赞