Java 学习笔记之父子类Synchronized

父子类Synchronized：

我们通过一个例子来验证下，父类和子类的Synchronized方法被同时调用，是否是同步的。

public class FatherClass {

    synchronized public void callFather(){
        try {
            System.out.println("------------Call Father start------");
            Thread.sleep(10000);
            System.out.println("------------Call Father end------");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}

public class SunClass extends FatherClass {

    synchronized public void callSon(){
        try {
            System.out.println("------------Call Son start------");
            Thread.sleep(10000);
            System.out.println("------------Call Son end------");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}

public class FatherThread extends Thread {
    private FatherClass f;
    public FatherThread(FatherClass f) {
        this.f = f;
    }
    @Override
    public void run() {
        super.run();
        f.callFather();
    }
}

public class SunThread extends Thread {
    private SunClass s;

    public SunThread(SunClass s) {
        this.s = s;
    }

    @Override
    public void run() {
        super.run();
        s.callSon();
    }
}

public class ThreadRunMain {
    public static void main(String[] args) {
        testSyncFSThread();
    }

    public static void testSyncFSThread(){
        SunClass sc = new SunClass();
        SunThread st = new SunThread(sc);
        st.start();
        FatherThread ft = new FatherThread(sc);
        ft.start();
    }
}

运行结果：

Java 学习笔记之父子类Synchronized

通过验证，回答是Yes。