KONVERTER BILANGAN DESIMAL KE BINER, HEXA, DAN OCTAL.

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package praktikumjava;

/**
 *
 * @author Andremoklet
 */
import java.util.Scanner;
import javax.swing.JOptionPane;
/*
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/**
 *
 * @author andre
 */

public class konverter_bilangan_desimal_dengan_menu_biner_octal_hexa {
       //global variable
    static String name;//object
    static int bilDes;//variable
    static int asli;

    //fungsi/method rekursi
    public static void Biner (int n){
        if (n>1){
            Biner(n/2);
        }
        System.out.print(n%2);
    }
     public static void Hexa(int n){
        asli=n;
        if(n>1){
            Hexa(n/16);
        }
        if(!((n%16==0)&(n==asli))){ //jika heksa awal 0 tidak ditulis (misal 0F ditulis F)
        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);//System.out.print(
        }
        }
    }
     public static void Oktal (int n){
        if (n>1){
            Oktal(n/8);
        }
        System.out.print(n%8);
    }
    public static void tampilBiner(){
        inputDes();
        System.out.print("Binernya adalah ");
        Biner(bilDes);
    }


public static void tampilHexa(){
    inputDes();
    System.out.print("Hexanya adalah ");
    Hexa(bilDes);
}
    public static void tampilOktal(){
        inputDes();
        System.out.println("Oktalnya adalah ");
        Oktal(bilDes);
    
    }
        public static int inpBil(){
        System.out.println("=========================="+" \n Selamat Datang Bro/Sis "
                + name +",");
        System.out.println("Silahkan Memilih Menu Konversi"+"Bilangan ke: "+
                "\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 int inputDes(){
        System.out.print("Masukkan Bilangan Desimal =  ");
        Scanner inputan=new Scanner (System.in);
        bilDes=inputan.nextInt();
        return bilDes;
    }
    public static void menU(int pil){
        System.out.println("\033");//clear screen
        switch (pil){
            case 1 : tampilBiner();break;
            case 2: tampilHexa(); break;
            case 3: tampilOktal(); break;
            case 4:System.out.println("Terima kasih ya,sudah mampir.");
                System.exit(0);break;
            default:System.out.println("(Maaf.Pilih angka 1-4 saja)");break;
        }
        System.out.println("\033");//clear screen
    }
     public static void main (String args[]){
        name=JOptionPane.showInputDialog("Masukkan Nama Anda : ");
        do {
            menU(inpBil());
        }
        while(true);
        }
    }
                                                       SEMOGA DAPAT MEMBANTU TUGAS ANDA..:)