Java多線程（二） synchronized 拋出異常鎖自動解除

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當一個線程執行的代碼出現異常時，其所持有的鎖會自動釋放

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();        }    }}

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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();        }}

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Java多線程（二） synchronized 拋出異常鎖自動解除