Can anyone change this to polymorphism?
it is a simple program. no calculation at all. but the problem is, everytime i'll try to use polymorphim or extanding the classes, error occurs. actually i wish this program is in polymorphism structure, but im not really good in it(polymorphism).
import java.io.*;
class drinks{
public String name;
public double price;
public int volume;
public drinks(String nama,double harga,int isipadu){
name=nama;
price=harga;
volume=isipadu;
}
public String showName(){
return name;
}
public double showPrice(){
return price;
}
public int showVolume(){
return volume;
}
}
class vendingMachine2{
public static void main(String[]args)throws IOException{
BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
drinks d[]=new drinks[10];
d[0]=new drinks(" Cola small ",1.50,150);
d[1]=new drinks(" Cola medium ",2.50,550);
d[2]=new drinks(" Cola large ",3.50,800);
d[3]=new drinks(" Pepsi small ",1.40,150);
d[4]=new drinks(" Pepsi medium ",2.40,550);
d[5]=new drinks(" Pepsi large ",3.40,800);
d[6]=new drinks(" Sprite small ",1.30,150);
d[7]=new drinks(" Sprite medium ",2.30,550);
d[8]=new drinks(" Sprite large ",3.30,800);
String masuk;
int pilih;
System.out.println("\n--------------…
System.out.println("|| ||");
System.out.println("|| SELAMAT DATANG KE 'VENDING MACHINE' SAYA ||");
System.out.println("|| ||");
System.out.println("----------------…
System.out.println("|| || || || ||");
System.out.println("|| Nama || RM || ml || Get ||");
System.out.println("|| || || || ||");
System.out.println("----------------…
for(int x=0;x<9;x++){
System.out.println("||"+d[x].showNa… "+d[x].showPrice()+" || "+d[x].showVolume()+" || "+x+" ||");
System.out.println("|| || || || ||");
System.out.println("---------------…
}
String str = "masukan huruf tidak diterima. maaf";
String strUpper = str.toUpperCase();
String str2 = "sila run semula sistem ini";
String str2Upper = str2.toUpperCase();
try
{
System.out.print(" Get ");
masuk = input.readLine();
pilih = Integer.parseInt(masuk);
if(pilih <= 8)
{
System.out.println(" _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ");
System.out.println(" | | | |");
System.out.println(" |^_^| < Tahniah! anda telah membeli: |");
System.out.println(" |_ _| |"+d[pilih].showName()+" |");
System.out.println(" /|\\ | "+d[pilih].showVolume()+" mL dengan harga |");
System.out.println(" | | RM "+d[pilih].showPrice()+"0 sahaja. gulp! |");
System.out.println(" / \\ |_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _|");
}
else
{
System.out.println("Tiada dalam pilihan!");
}
}
catch(Exception ex)
{
System.out.println(strUpper);
System.out.println(str2Upper);
}
}
}