题目描述

这段代码是可以执行的，但是我删除static Object o1 = new Object(), o2 = new Object();前面的static，死锁问题就没了，求解答？

相关代码

public class TestDeadLock implements Runnable {
    int flag = 1;
    static Object o1 = new Object(), o2 = new Object();

    public static void main(String[] args) {
        TestDeadLock tdl1 = new TestDeadLock();
        TestDeadLock tdl2 = new TestDeadLock();
        tdl1.flag = 0;
        tdl2.flag = 1;
        Thread t1 = new Thread(tdl1);
        Thread t2 = new Thread(tdl2);
        t1.start();
        t2.start();
    }

    @Override
    public void run() {
        System.out.println("flag:" + flag);
        if (flag == 0) {
            synchronized (o1) {
                try {
                    Thread.sleep(1000);
                } catch (Exception e) {
                    // TODO: handle exception
                }
                synchronized (o2) {
                    System.out.println("0");
                }
            }
        }
        if (flag == 1) {
            synchronized (o2) {
                try {
                    Thread.sleep(1000);
                } catch (Exception e) {
                    // TODO: handle exception
                }
                synchronized (o1) {
                    System.out.println("1");
                }
            }
        }
        
    }
}