死锁示例代码

public class Demo05 {
public static void main(String[] args) {
MyRunnable mr = new MyRunnable();

new Thread(mr).start();
new Thread(mr).start();
}
}

class MyRunnable implements Runnable {
Object objA = new Object();
Object objB = new Object();

/*
嵌套1 objA
嵌套1 objB
嵌套2 objB
嵌套1 objA
*/
@Override
public void run() {
synchronized (objA) {
System.out.println("嵌套1 objA");
synchronized (objB) {// t2, objA, 拿不到B锁,等待
System.out.println("嵌套1 objB");
}
}

synchronized (objB) {
System.out.println("嵌套2 objB");
synchronized (objA) {// t1 , objB, 拿不到A锁,等待
System.out.println("嵌套2 objA");
}
}
}
}