interface A
{   char CH='A';
    void show( );
}

class B implements A
{   public void show( )
    {   System.out.println("這里是接口"+CH+"的實現");
    }
}

class InterfaceTest
{   public static void main(String args[ ])
    {   B b=new B( );
        b.show( );
    }
}