public class Test {
    static Object o1 = new Object();
    static Object o2 = new Object();

    public static void main(String[] args) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                synchronized (o1) {
                    System.out.println(
 
"線程1鎖o1");
                    try {
                        Thread.sleep(1000);//讓當前線程睡眠，保證讓另一線程得到o2，防止這個線程啟動一下連續獲得o1和o2兩個對象的鎖。
                        synchronized (o2) {
                            System.out.println("線程1鎖o2");
                        }
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        }).start();

        
 
new Thread(new Runnable() {
            @Override
            public void run() {
                synchronized (o2) {
                    System.out.println("線程2鎖o2");
                    synchronized (o1) {
                        System.out.println("線程2鎖o1");
                    }
                }
            }
        }).start();
    }
}
 

寫一個會導致死鎖的線程