package com.ctrip.apollo.core.utils;

 /**

  * @author Jason Song(song_s@ctrip.com)

  */

 public class ByteUtil {

   private static final char[] HEX_CHARS = new char[] {

       '0', '1', '2', '3', '4', '5', '6', '7',

       '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };

   public static byte int3(final int x) {

     return (byte) (x >> 24);

   }

   public static byte int2(final int x) {

     return (byte) (x >> 16);

   }

   public static byte int1(final int x) {

     return (byte) (x >> 8);

   }

   public static byte int0(final int x) {

     return (byte) (x);

   }

   public static String toHexString(byte[] bytes) {

     char[] chars = new char[bytes.length * 2];

     int i = 0;

     for (byte b : bytes) {

       chars[i++] = HEX_CHARS[b >> 4 & 0xF];

       chars[i++] = HEX_CHARS[b & 0xF];

     }

     return new String(chars);

   }

 }