1.7.7释放锁的不良后果

使用stop释放锁将会导致数据出现不一致的结果。

测试如下

package com.cky.bean;

/**
 * Created by edison on 2017/12/3.
 */
public class SynchroizeObject {
    private String usrname="a";
    private String pwd ="aa";

    public String getUsrname() {
        return usrname;
    }

    public void setUsrname(String usrname) {
        this.usrname = usrname;
    }

    public String getPwd() {
        return pwd;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }

    synchronized  public void printString(String usrname, String pwd) {
        try {
            this.usrname = usrname;
            Thread.sleep(100000);
            this.pwd = pwd;
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

package com.cky.thread;

import com.cky.bean.SynchroizeObject;

/**
 * Created by edison on 2017/12/3.
 */
public class MyThread extends Thread{
    private SynchroizeObject so;
    public MyThread (SynchroizeObject so) {
        super();
        this.so = so;
    }
    @Override
    public void run() {
       so.printString("b","bb");
    }
}

package com.cky.test;

import com.cky.bean.SynchroizeObject;
import com.cky.thread.MyThread;

/**
 * Created by edison on 2017/12/3.
 */
public class Test {
    public static void main(String[] args) {
        try {
            SynchroizeObject so = new SynchroizeObject();
            MyThread myThread = new MyThread(so);
            myThread.start();
            Thread.sleep(2000);
            myThread.stop();
            System.out.println(so.getUsrname()+ "..."+ so.getPwd());
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

C:itsoftjdkinjava -Didea.launcher.port=7532 "-Didea.launcher.bin.path=C:itsoftideaIntelliJ IDEA 2016.3.3in" -Dfile.encoding=UTF-8 -classpath "C:itsoftjdkjrelibcharsets.jar;C:itsoftjdkjrelibdeploy.jar;C:itsoftjdkjrelibextaccess-bridge-32.jar;C:itsoftjdkjrelibextcldrdata.jar;C:itsoftjdkjrelibextdnsns.jar;C:itsoftjdkjrelibextjaccess.jar;C:itsoftjdkjrelibextjfxrt.jar;C:itsoftjdkjrelibextlocaledata.jar;C:itsoftjdkjrelibext
ashorn.jar;C:itsoftjdkjrelibextsunec.jar;C:itsoftjdkjrelibextsunjce_provider.jar;C:itsoftjdkjrelibextsunmscapi.jar;C:itsoftjdkjrelibextsunpkcs11.jar;C:itsoftjdkjrelibextzipfs.jar;C:itsoftjdkjrelibjavaws.jar;C:itsoftjdkjrelibjce.jar;C:itsoftjdkjrelibjfr.jar;C:itsoftjdkjrelibjfxswt.jar;C:itsoftjdkjrelibjsse.jar;C:itsoftjdkjrelibmanagement-agent.jar;C:itsoftjdkjrelibplugin.jar;C:itsoftjdkjrelib
esources.jar;C:itsoftjdkjrelib
t.jar;C:多线程核心技术第一章outproduction第一章;C:itsoftideaIntelliJ IDEA 2016.3.3libidea_rt.jar" com.intellij.rt.execution.application.AppMain com.cky.test.Test
b...aa

Process finished with exit code 0

综上所述，表明stop方法会导致数据不同步，不建议使用