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:\itsoft\jdk\bin\java -Didea.launcher.port=7532 "-Didea.launcher.bin.path=C:\itsoft\idea\IntelliJ IDEA 2016.3.3\bin" -Dfile.encoding=UTF-8 -classpath "C:\itsoft\jdk\jre\lib\charsets.jar;C:\itsoft\jdk\jre\lib\deploy.jar;C:\itsoft\jdk\jre\lib\ext\access-bridge-32.jar;C:\itsoft\jdk\jre\lib\ext\cldrdata.jar;C:\itsoft\jdk\jre\lib\ext\dnsns.jar;C:\itsoft\jdk\jre\lib\ext\jaccess.jar;C:\itsoft\jdk\jre\lib\ext\jfxrt.jar;C:\itsoft\jdk\jre\lib\ext\localedata.jar;C:\itsoft\jdk\jre\lib\ext\nashorn.jar;C:\itsoft\jdk\jre\lib\ext\sunec.jar;C:\itsoft\jdk\jre\lib\ext\sunjce_provider.jar;C:\itsoft\jdk\jre\lib\ext\sunmscapi.jar;C:\itsoft\jdk\jre\lib\ext\sunpkcs11.jar;C:\itsoft\jdk\jre\lib\ext\zipfs.jar;C:\itsoft\jdk\jre\lib\javaws.jar;C:\itsoft\jdk\jre\lib\jce.jar;C:\itsoft\jdk\jre\lib\jfr.jar;C:\itsoft\jdk\jre\lib\jfxswt.jar;C:\itsoft\jdk\jre\lib\jsse.jar;C:\itsoft\jdk\jre\lib\management-agent.jar;C:\itsoft\jdk\jre\lib\plugin.jar;C:\itsoft\jdk\jre\lib\resources.jar;C:\itsoft\jdk\jre\lib\rt.jar;C:\多线程核心技术\第一章\out\production\第一章;C:\itsoft\idea\IntelliJ IDEA 2016.3.3\lib\idea_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