Cafe.java

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package com.belajar.abstarct;

/**
 *
 * @author erli
 */
public abstract class Cafe {
    protected String namaPemesan = "";
    
    protected abstract String namaMakanan ();
    protected abstract String namaMinuman ();
    protected abstract int hargaMakanan ();
    protected abstract int hargaMinuman ();
}

class Udin extends Cafe {

    @Override
    public String namaMakanan() {
        return "steak";
    }

    @Override
    public String namaMinuman() {
        return "jus Alpukat";
       }

    @Override
    public int hargaMakanan() {
       return 22000 ;
    }

    @Override
    public int hargaMinuman() {
       return 7000; 
    }
}
    
class Amir extends Cafe{

    @Override
    public String namaMakanan() {
      return "Baso Campur" ; 
    }

    @Override
    public String namaMinuman() {
        return "Teh manis lemon";  
    }

    @Override
    public int hargaMakanan() {
        return 15000;
    }

    @Override
    protected int hargaMinuman() {
        return 6000;
    }
}

class Fahri extends Cafe{

    @Override
    public String namaMakanan() {
        return "Nasi Goreng Spesial";
    }

    @Override
    public String namaMinuman() {
        return"Teh manis biasa";
    }

    @Override
    public int hargaMakanan() {
        return 20000;
    }

    @Override
    public int hargaMinuman() {
        return 4000;
    }
    
}

class implement{
    public static void main (String []args){
   
    Udin CafeUdin = new Udin();
    Amir CafeAmir = new Amir ();
    Fahri CafeFahri = new Fahri ();
    
    System.out.println( "Hangout Di CAFE Marjan");
    System.out.println( "Udin Memesan : " );
    System.out.println( "Makanan : "+CafeUdin.namaMakanan()+"\t\t\t Rp."+CafeUdin.hargaMakanan());
    System.out.println( "Makanan : "+CafeUdin.namaMinuman()+"\t\t Rp."+CafeUdin.hargaMinuman());
    System.out.println("--------------------------------------------------------------------");
    
    System.out.println( "Amir Memesan : " );
    System.out.println( "Makanan : "+CafeAmir.namaMakanan()+"\t\t Rp."+CafeAmir.hargaMakanan());
    System.out.println( "Makanan : "+CafeAmir.namaMinuman()+"\t Rp."+CafeAmir.hargaMinuman());
    System.out.println("--------------------------------------------------------------------");
    
    System.out.println( "Fahri Memesan : " );
    System.out.println( "Makanan : "+CafeFahri.namaMakanan()+"\t Rp."+CafeFahri.hargaMakanan());
    System.out.println( "Makanan : "+CafeFahri.namaMinuman()+"\t Rp."+CafeFahri.hargaMinuman());
    System.out.println("--------------------------------------------------------------------");
    
    System.out.println("TOTAL : \t\t\t Rp."+(CafeUdin.hargaMakanan()+CafeUdin.hargaMinuman()+CafeAmir.hargaMakanan()+CafeAmir.hargaMinuman()+CafeFahri.hargaMakanan()+CafeFahri.hargaMinuman()));
    }
}