VolumeBalok

package Tugasnya;

import Tugasnya.RumusVolumeBalok2;

interface VolumeBalok{
    public void namaBarang();
}

abstract class VolumeBalok2{
    public abstract void namaBarang();
    public abstract void rumus(int p, int l, int t);
}

class book implements VolumeBalok, RumusVolumeBalok2{

    @Override
    public void namaBarang() {
        System.out.println("Nama Barang : Buku");
    }

    @Override
    public void rumus(int p, int l, int t) {
        int hasil = p*l*t;
        System.out.println("Volume Barang : "+hasil+" CM3");
    }

}

class basket extends VolumeBalok2{//RumusVolumeBalok2{

    public void namaBarang(){
        System.out.println("Nama Barang : Keranjang");
    }

    @Override
    public void rumus(int p, int l, int t) {
        int hasil = p*l*t;
        System.out.println("Volume Barang : "+hasil+" CM3");
    }
}

class main{
    public static void main(String[] args) {
        book buku = new book();
        buku.namaBarang();buku.rumus(20, 10, 5);
        basket keranjang = new basket();
        keranjang.namaBarang();keranjang.rumus(80, 50, 60);
    }
}