一多线程

1.1 死锁

1.1.1 死锁的案例

package com.ljf.day0814;

/**
 * @ClassName: DeadLock
 * @Description: TODO
 * @Author: admin
 * @Date: 2023/08/21 09:31:16 
 * @Version: V1.0
 **/
public class DeadLock {
    public static void main(String[] args) {
        Object objA=new  Object();
        Object objB=new Object();
        new Thread(new Runnable() {
            @Override
            public void run() {
                synchronized (objA){
                    System.out.println("我是线程objA："+Thread.currentThread().getName());
                    try {
                        Thread.sleep(2000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    synchronized (objB){
                        System.out.println("我是线程objA：在等待获取objb"+Thread.currentThread().getName());
                    }
                }
            }
        }).start();
        new Thread(new Runnable() {
            @Override
            public void run() {
                synchronized (objB){
                    System.out.println("我是线程objB："+Thread.currentThread().getName());
                    try {
                        Thread.sleep(2000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    synchronized (objA){
                        System.out.println("我是线程objB：在等待获取objA"+Thread.currentThread().getName());
                    }
                }
            }
        }).start();
    }
}