Script Java Tabung

package quis;
import java.util.Scanner;
/**
 *
 * @author Alfin_Zheto
 */
public class Tabung { public static void main(String[] args) {

  Scanner input = new Scanner (System.in);
 
  System.out.println("Jari-Jari\t=\t");
  int r = input.nextInt();

  System.out.println("Tinggi\t=\t");
  int t = input.nextInt();

 
  double luas_alas = Math.PI*Math.pow(r, 2);
  System.out.println("Luas alas\t=\t"+luas_alas);
 
  double volume = luas_alas*t;
  System.out.println("Volume\t=\t"+volume);
 
  System.exit(0);

}
}