当一个线程执行的代码出现异常时，其所持有的锁会自动释放
public class MyObject { private int i = 1; synchronized public void methodA() throws InterruptedException { System.out.println("begin methodA threadName=" + Thread.currentThread().getName()); if(i==1){ throw new InterruptedException(); } System.out.println("end methodA "); } synchronized public void methodB() throws InterruptedException { System.out.println("begin methodB threadName=" + Thread.currentThread().getName()); System.out.println(" end methodB"); } }
ThreadA 和 ThreadB
public class ThreadA extends Thread { private MyObject myObject; public ThreadA(MyObject myObject){ this.myObject =myObject; } public void run(){ try { myObject.methodA(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } public class ThreadB extends Thread { private MyObject myObject; public ThreadB(MyObject myObject){ this.myObject =myObject; } public void run(){ try { myObject.methodB(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
Run
public class Run { public static void main(String[] args) { MyObject object = new MyObject(); ThreadA threadA = new ThreadA(object); threadA.setName("A"); threadA.start(); ThreadB threadB = new ThreadB(object); threadB.setName("B"); threadB.start(); } }
Java多线程（二） synchronized 抛出异常锁自动解除
原文：http://www.cnblogs.com/newlangwen/p/7596353.html
