线程死锁的原因:
同步中嵌套同步,但是锁却不同
class Test implements Runnable { private boolean flag; Test(boolean flag) { this.flag = flag; } public void run() { if(flag) { while(true) { synchronized(MyLock.locka) { System.out.println(Thread.currentThread().getName()+"...if locka "); synchronized(MyLock.lockb) { System.out.println(Thread.currentThread().getName()+"..if lockb"); } } } } else { while(true) { synchronized(MyLock.lockb) { System.out.println(Thread.currentThread().getName()+"..else lockb"); synchronized(MyLock.locka) { System.out.println(Thread.currentThread().getName()+".....else locka"); } } } } } } class MyLock { static Object locka = new Object(); static Object lockb = new Object(); } class DeadLockTest { public static void main(String[] args) { Thread t1 = new Thread(new Test(true)); Thread t2 = new Thread(new Test(false)); t1.start(); t2.start(); } }
死锁
时间: 2024-10-17 12:01:54