Java: Convert byte array to hexa string

Below snippet converts byte array to hexa string.

private static final char[] HEXDIGITS = "0123456789ABCDEF".toCharArray();

private static String toHexString(byte[] bytes) {

   StringBuilder sb = new StringBuilder(bytes.length * 3);

   for (int b : bytes) {

      b &= 0xff;

      sb.append(HEXDIGITS[b >> 4]);

      sb.append(HEXDIGITS[b & 15]);

      //sb.append(' ');

   }

   return sb.toString();

}

Find the below working application.

App.java

package com.sample.app;

public class App {
   private static final char[] HEXDIGITS = "0123456789ABCDEF".toCharArray();

   private static String toHexString(byte[] bytes) {
      StringBuilder sb = new StringBuilder(bytes.length * 3);
      for (int b : bytes) {
         b &= 0xff;
         sb.append(HEXDIGITS[b >> 4]);
         sb.append(HEXDIGITS[b & 15]);
         // sb.append(' ');
      }
      return sb.toString();
   }

   public static void main(String args[]) {
      String str = "Hello World";

      String hexaString = toHexString(str.getBytes());

      System.out.println("Hexa string for " + str + " is " + hexaString);

   }
}

Output
Hexa string for Hello World is 48656C6C6F20576F726C64

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