Java - IP en binarios en Java

import java.util.Scanner;

public class convierteInt {

	public static void main(String[] args){

		Scanner sc=new Scanner(System.in);

		System.out.println("\nIndica en la base(max 36): ");

		int d = sc.nextInt();

		d=d>36?36:d;

		System.out.println("\nIndica el numero a convertir a (base "+d+"): ");

		int n = sc.nextInt();

		System.out.print(" (base "+d+"): "+toBASE(n,d)+"\n");

	}

	public static String toBASE(int n,int d){

		String b = "";

		String c = "";

		while (n != 0){

			int r = (int)(n % d); // remainder

			if(r>9){

				if(r==10)

					c = "A";

				else if(r==11)

					c = "B";

				else if(r==12)

					c = "C";

				else if(r==13)

					c = "D";

				else if(r==14)

					c = "E";

				else if(r==15)

					c = "F";

				else if(r==16)

					c = "G";

				else if(r==17)

					c = "H";

				else if(r==18)

					c = "I";

				else if(r==19)

					c = "J";

				else if(r==20)

					c = "K";

				else if(r==21)

					c = "L";

				else if(r==22)

					c = "M";

				else if(r==23)

					c = "N";

				else if(r==24)

					c = "O";

				else if(r==25)

					c = "P";

				else if(r==26)

					c = "Q";

				else if(r==27)

					c = "R";

				else if(r==28)

					c = "S";

				else if(r==29)

					c = "T";

				else if(r==30)

					c = "U";

				else if(r==31)

					c = "V";

				else if(r==32)

					c = "W";

				else if(r==33)

					c = "X";

				else if(r==34)

					c = "Y";

				else if(r==35)

					c = "Z";

				b = c + b;

			}else

				b = r + b; // concatenate remainder

			n /= d; // reduce n

		}

		return b;

	}

}