public Class DeadLockedDemo{
pubilc static Object resource1 =new Object ();
public static Object resource2 =new Object ();
public static void main (String[ ] args){
new Thread( () ->{
synchronized(resource1){
system.out.println(Thread.currentThread() +"get resource1 ");
try{
Thread.sleep(1000);
}catch(InterruptedException e){
e.printStackTrace();
}
system.out.println(Thread.currentThread() +"waiting get resource2 ");
synchronized(resource2){
system.out.println(Thread.currentThread() +"get resource2");
}
}
},"线程1").start();
new Thread( () ->{
synchronized(resource2){
system.out.println(Thread.currentThread() +"get resource 2");
try{
Thread.sleep(1000);
}catch(InterruptedException e){
e.printStackTrace();
}
system.out.println(Thread.currentThread() +"waiting get resource 1");
synchronized(resource1){
system.out.println(Thread.currentThread() +"get resource 1");
}
}
} ,"线程2").start();
}
}
输出
Thread[线程 1,5,main]get resource1
Thread[线程 2,5,main]get resource2
Thread[线程 1,5,main]waiting get resource2
Thread[线程 2,5,main]waiting get resource1
线程 A 通过 synchronized (resource1) 获得 resource1 的监视器锁，然后通过Thread.sleep(1000);让线程 A 休眠 1s 为的是让线程 B 得到执行然后获取到 resource2 的监视器锁。线程 A 和线程 B 休眠结束了都开始企图请求获取对方的资源，然后这两个线程就会陷入互相等待的状态，这也就产生了死锁。
