Java多态——代码示例

class A{
    public void Out()
    {
        System.out.println("This is A");
    }
}

class B extends A{
    public void Out()
    {
        System.out.println("This is B");
    }
}

class C extends A{
    public void Out()
    {
        System.out.println("This is C");
    }
}

public static void main(String[] args)
    {
        A isA=new A();
        isA.Out();//输出A
        A isB=new B();
        isB.Out();//输出B
        A isC=new C();
        isC.Out();//输出C
    }