decimal to hexadecimal,binary and octonary.

Here is a simple algorithm about 'decimal' to 'dexadecimal',and the implementation code:

 /*
 Convert from decimal to binary,octonary and hexadecimal.
 */
 package kju.decto;

 import kju.print.Printer;
 public class DecimalTo {
     public static String decToHex(int num) {
         return transDec(num, 15, 4);
     }

     public static String decToBinary(int num) {
         return transDec(num, 1, 1);
     }

     public static String decToOctonary(int num) {
         return transDec(num, 7, 3);
     }

     /*transform decimal to others.
     num: the input decimal.
     base: the value to be '&'(bitwise AND) operate with 'num' for each shift operation.
     offset:the number to shift each time.
     */
     private static String transDec(int num, int base, int offset) {
         if(num == 0)
             return "0";
         char[] csRef = getHexTable();
         char[] csStorage = new char[32];    //store the result(32 is the max length).
         int pos = csStorage.length;    //position to store in the 'scStorage'.
         while(num != 0) {
             int temp = num & base;
             csStorage[--pos] = csRef[temp];
             num >>>= offset;
         }
         return String.valueOf(csStorage, pos, csStorage.length - pos);
     }

     //table that contains each item of hexadecimal letter.
     private static char[] getHexTable() {
         return new char[]{'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
     }

     public static void main(String[] args) {
         String result = decToHex(60);
         Printer.println(result);
         //prints:3C.
         Printer.printHr();
         result = decToBinary(-6);
         Printer.println(result);
         //prints:11111111111111111111111111111010.
         Printer.printHr();
         result = decToOctonary(30);
         Printer.println(result);
         //prints:36
     }
 }

Rre:　　Some relevant operations.