Pemakaian Fungsi pada Java untuk Mengitung Diskon, Pajak & Total Bayar

import java.io.*;
class Latfungsi{
public static void main(String Arg[]) throws IOException{
String str;
double pajak=0;
double total=0;
double xtot=0;
double tbayar=0;
double xpajak=0;
BufferedReader Get=new BufferedReader(new InputStreamReader(System.in));
Latfungsi fungsi= new Latfungsi();
System.out.print(“Input Total Harga : “); str=Get.readLine();
xtot=Double.parseDouble(str);
System.out.println(“Discount          : “+fungsi.hitung(xtot));
System.out.println(“Pajak             : “+fungsi.jumlah(xtot));
tbayar=xtot-fungsi.hitung(xtot)+fungsi.jumlah(xtot);
System.out.println(“Total Bayar      : “+tbayar);
}

double hitung(double total){
double discount;
if(total>=2000000)
discount=0.1*total;
else if(total>=1000000)
discount=0.05*total;
else
discount=0;
return(discount);
}

double jumlah(double pajak){
double xpajak;
xpajak=0.1*pajak;
return(xpajak);
}
}