不可以更动对象锁的引用

不可以更改对象锁的引用

import java.util.logging.Level;import java.util.logging.Logger;/** * * @author max * 可以修改锁的内容,但不能修改锁的引用 */public class TestNotify{    static Boolean lock = true;//    static  A lock = new A(1);    static Boolean condition = true;    public static void main(String[] args) throws Exception{        new TestThread().start();        new TestThread().start();        Thread.sleep(1000);        System.out.println("Doing something");        synchronized(lock){//            Boolean b = lock;  //这样就可以了//            lock.setA(0);      //语句1  改成condition ，赋值改变了lock的引用            lock = false;//            b.notifyAll();     //语句2            lock.notifyAll();        }    }}class TestThread extends Thread{    public void run(){        synchronized(TestNotify.lock){            while(TestNotify.lock){//            while(TestNotify.lock.getA() == 1){    //改成condition                try {                    TestNotify.lock.wait();                } catch (InterruptedException ex) {                    Logger.getLogger(TestThread.class.getName()).log(Level.SEVERE, null, ex);                }            }            System.out.println(getId());        }    }}class A{    int a;    public A(int i){        a = i;    }    public void setA(int i){        a = i;    }    public int getA()    {        return a;    }}

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