技術標籤：多執行緒多執行緒java

package 多執行緒技能1;
/**
 *   使用stop（）釋放鎖給資料造成的不一致的結果
 *  對鎖定的物件進行“解鎖”操作，會導致資料得不到同步的處理，進而
 *  出現數據不一致的問題。
 */

/**
 * 測試
 */
class MyServer1R1117 extends Thread{
    private String username="a";
    private String password ="aa";

    synchronized public String getUsername
 
(){
        return username;
    }
    synchronized  public String getPassword(){
        return password;
    }
    synchronized public  void printString(String username,String password){
        try {
            this.username=username;
            Thread.sleep(100000);
            this.password=password;
 

        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

/**
 * 呼叫printString()
 */
class MyThreadA extends Thread{
    private MyServer1R1117 object;
    public MyThreadA(MyServer1R1117 object){
        super();
        this.object=object;
    }

    @Override
    public
 
 void run() {
        object.printString("b","bb");
    }
}

/**
 * 輸出username 和 password
 */
class MyThreadB  extends Thread{
    private MyServer1R1117 object;
    public MyThreadB (MyServer1R1117 object){
        super();
        this.object=object;
    }

    @Override
    public void run() {
        System.out.println("username="+object.getUsername());
        System.out.println("password="+object.getPassword());
    }
}

/**
 * 測試類
 */
class RunT1117{
    public RunT1117(){
        try {
            MyServer1R1117 object=new MyServer1R1117();
            MyThreadA threadA=new MyThreadA(object);
            threadA.start();
            Thread.sleep(100);
            MyThreadB myThreadB=new MyThreadB(object);
            myThreadB.start();
            Thread.sleep(3000);
            threadA.stop();
            System.out.println("stop()執行後，在下方開始列印username和password");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}
public class T1117 {
    public static void main(String[] args) {
        RunT1117 runT1117=new RunT1117();
    }
}