Java : konversi Bilangan

package Praktek1;

import java.util.Scanner;
import javax.swing.JOptionPane;

public class konversi_bilangan {
    static String name;
    static int bilDes;
    static int asli;
    public static void Biner(int n){
        if(n>1){
            Biner(n/2);
        }
        System.out.print(n%2);
    }
    public static void tampilBiner(){
        inputDes();
        System.out.print("Binernya adalah :");
                Biner(bilDes);
    }
    public static void Oktal(int n){
        if(n>1){
            Oktal(n/8);
        }
        System.out.print(n%8);
    }
    public static void tampilOktal(){
        inputDes();
        System.out.print("Oktalnya adalah :");
                Oktal(bilDes);
    }
  
    public static void Heksa(int n){
        asli = n;
        if(n>1){
            Heksa(n/16);
        }
        if(!((n%16==0)&(n==asli))){
        switch(n%16){
            case 10 : System.out.print("A"); break;
            case 11 : System.out.print("B"); break;
            case 12 : System.out.print("C"); break;
            case 13 : System.out.print("D"); break;
            case 14 : System.out.print("E"); break;
            case 15 : System.out.print("F"); break;
            default : System.out.print(n%16);
        }
        }
    }
    public static void tampilHeksa(){
        inputDes();
        System.out.print("Heksanya adalah :");
                Heksa(bilDes);
    }
    public static int inpBil(){
        System.out.println("=================================="+
                "\n\nSelamat datang "+name);
        System.out.println("Silakan memilih Menu Konversi Bilanagn"+
                "\n1. Biner \n2. Hexa \n3. Oktal \n4. Exit ");
        System.out.print("Masukkan angka Menu = ");
        Scanner inputan = new Scanner(System.in);
        int pilmenu = inputan.nextInt();
        return pilmenu;
    }
    public static void inputDes() {
        System.out.print("Masukkan Bilangan desimal = ");
        Scanner inputan=new Scanner(System.in);
        bilDes=inputan.nextInt();
       
    }
    public static void menU(int pil){
        System.out.println("\033");
        switch(pil){
            case 1: tampilBiner(); break;
            case 2: tampilHeksa();break;
            case 3: tampilOktal();break;
            case 4: System.out.println("BUBYE!!");
                System.exit(0); break;
            default:System.out.println("(Maaf. Pilih angka 1-4");
        }
        System.out.println("\033");
    }
    public static void main(String arg[]){
        name = JOptionPane.showInputDialog("Masukkan Nama Anda ");
        do{
            menU(inpBil());
        }
        while(true);
    }
}

Hasilnya OM :