Menghitung luas permukaan dan volume balok

import java.io.*;
class cara_menghitung_luas_permukaan_dan_volume_balok
{
public static void main(String[] args) throws Exception
{
System.out.println("Nama : Made Adi Putra");
System.out.println("NIM : 080020015");

DataInputStream dis = new DataInputStream (System.in);
int x,y,z;
int lp,vol;
String pjg,lbr,tgi;
System.out.print("Masukkan Nilai X :");
pjg=dis.readLine();
x=Integer.parseInt(pjg);
System.out.print("Masukkan Nilai Y :");
lbr=dis.readLine();
y=Integer.parseInt(lbr);
System.out.print("Masukkan Nilai Z :");
tgi=dis.readLine();
z=Integer.parseInt(tgi);
lp=x*y*z;
vol=2*(x*y*z);
System.out.print("Luas Permukaan Balok :"+lp);
System.out.print("Volume Balok :"+vol);
System.exit(0);
}
}