Java ByteBuffer to Hex toHex(ByteBuffer buf)

Description

Interprets the bytes inside the given buffer as a hexadecimal string.

License

Creative Commons License

Parameter

Parameter	Description
buf	The buffer to interpret, using the data between its position and limit.

Return

A string of (upper-cased) hexadecimal, with no leading prefix (ex. 0x)

Declaration

public static String toHex(ByteBuffer buf) 

Method Source Code

//package com.java2s;
/**/*from   w  w w. j  ava  2 s .c  o  m*/
 * Copyright (C) 2011 Darien Hager
 *
 * This code is part of the "HL2Parse" project, and is licensed under
 * a Creative Commons Attribution-ShareAlike 3.0 Unported License. For
 * either a summary of conditions or the full legal text, please visit:
 *
 * http://creativecommons.org/licenses/by-sa/3.0/
 *
 * Permissions beyond the scope of this license may be available
 * at http://technofovea.com/ .
 */

import java.nio.ByteBuffer;

public class Main {
    static final char[] HEX_CHARS = "0123456789ABCDEF".toCharArray();

    /**
     * Given an array of bytes, return a string of hexadecimal characters.
     * @param bytes The byte array to interpret
     * @return A series of (upper-cased) hexadecimal characters, without any leading values such as 0x
     */
    public static String toHex(byte[] bytes) {
        StringBuilder sb = new StringBuilder();
        for (byte b : bytes) {
            sb.append(HEX_CHARS[(b & 0xF0) >>> 4]);
            sb.append(HEX_CHARS[b & 0x0F]);
        }

        return sb.toString();
    }

    public static String toHex(byte b) {
        return toHex(new byte[] { b });
    }

    /**
     * Interprets the bytes inside the given buffer as a hexadecimal string.
     *
     * The data in the buffer between its position and limit will be used, and the position will
     * be restored to its original value afterwards.
     *
     * @param buf The buffer to interpret, using the data between its position and limit.
     * @return A string of (upper-cased) hexadecimal, with no leading prefix (ex. 0x)
     */
    public static String toHex(ByteBuffer buf) {
        int orig = buf.position();
        StringBuilder sb = new StringBuilder();
        while (buf.remaining() > 0) {
            byte b = buf.get();
            sb.append(HEX_CHARS[(b & 0xF0) >>> 4]);
            sb.append(HEX_CHARS[b & 0x0F]);
        }

        buf.position(orig);
        return sb.toString();
    }
}

Related

1. bytesToHex(ByteBuffer bytes)
2. bytesToHex(ByteBuffer bytes)
3. bytesToHexString(ByteBuffer b)
4. toHex(ByteBuffer bb)
5. toHex(ByteBuffer bb)
6. toHex(ByteBuffer buffer)
7. toHex(ByteBuffer data)
8. toHexStr(final ByteBuffer data)
9. toHexStream(ByteBuffer data)