Java ByteBuffer convert to String hexadecimal

import java.nio.ByteBuffer;
import java.util.Arrays;

public class Main {
  public static void main(String[] argv) throws Exception {
    byte[] byteArray = new byte[] { 65, 66, 67, 68, 69 };
    ByteBuffer bb = ByteBuffer.wrap(byteArray);

    String s = toString(bb);//from   www. j  a va 2 s  .  c  om

    System.out.println(s);
  }

  /**
   * Converts the contents of the specified {@link ByteBuffer} to a string, 
   * which is formatted similarly to the
   * output
   * of the {@link Arrays#toString()} method.
   *
   * @param buffer The buffer.
   * @return The string.
   */
  public static String toString(ByteBuffer buffer) {
      StringBuilder builder = new StringBuilder("[");

      int limit = buffer.limit();
      for (int index = 0; index < limit; index++) {
          String hex = Integer.toHexString(buffer.get() & 0xFF)
                  .toUpperCase();
          if (hex.length() == 1) {
              hex = "0" + hex;
          }

          builder.append("0x").append(hex);
          if (index != limit - 1) {
              builder.append(", ");
          }
      }

      builder.append("]");
      return builder.toString();
  }
}