小编use*_*656的帖子

class A
{
    int i=10;
    void show()
    {
        System.out.println("show()");
    }
}

class B extends A
{
    int j=20;
    void show1()
    {
        System.out.println("show1()");
    }
    public static void main(String ar[])
    {
        A a1=new B();//What happened internally here.please give me answer.
        a1.show();
        a1.show1();
    }
}