public class PenggunaanOverriding
{
    // instance variables - replace the example below with your own
    public static void main(String[] args){
        Binatang b = new Binatang();
        Mamalia m = new Mamalia();
        Binatang bm = new Mamalia();

        b.bergerak();
        m.bergerak();
        bm.bergerak();
        bm.berkembangBiak();
    }
}