Here you can find the source of toHexString(ByteBuffer buffer, int size)
| Parameter | Description |
|---|---|
| buffer | Buffer to display, starting at offset 0 |
| size | Number of bytes to read from the buffer |
public static String toHexString(ByteBuffer buffer, int size)
//package com.java2s; /*//from w ww . j a v a2s.c o m Copyright (c) 2005 Health Market Science, Inc. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA You can contact Health Market Science at info@healthmarketscience.com or at the following address: Health Market Science 2700 Horizon Drive Suite 200 King of Prussia, PA 19406 */ import java.nio.ByteBuffer; public class Main { private static final String[] HEX_CHARS = new String[] { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F" }; /** * Convert a byte buffer to a hexadecimal string for display * @param buffer Buffer to display, starting at offset 0 * @param size Number of bytes to read from the buffer * @return The display String */ public static String toHexString(ByteBuffer buffer, int size) { return toHexString(buffer, 0, size); } /** * Convert a byte array to a hexadecimal string for display * @param array byte array to display, starting at offset 0 * @return The display String */ public static String toHexString(byte[] array) { return toHexString(ByteBuffer.wrap(array), 0, array.length); } /** * Convert a byte buffer to a hexadecimal string for display * @param buffer Buffer to display, starting at offset 0 * @param offset Offset at which to start reading the buffer * @param size Number of bytes to read from the buffer * @return The display String */ public static String toHexString(ByteBuffer buffer, int offset, int size) { return toHexString(buffer, offset, size, true); } /** * Convert a byte buffer to a hexadecimal string for display * @param buffer Buffer to display, starting at offset 0 * @param offset Offset at which to start reading the buffer * @param size Number of bytes to read from the buffer * @param formatted flag indicating if formatting is required * @return The display String */ public static String toHexString(ByteBuffer buffer, int offset, int size, boolean formatted) { StringBuilder rtn = new StringBuilder(); int position = buffer.position(); buffer.position(offset); for (int i = 0; i < size; i++) { byte b = buffer.get(); byte h = (byte) (b & 0xF0); h = (byte) (h >>> 4); h = (byte) (h & 0x0F); rtn.append(HEX_CHARS[h]); h = (byte) (b & 0x0F); rtn.append(HEX_CHARS[h]); if (formatted == true) { rtn.append(" "); if ((i + 1) % 4 == 0) { rtn.append(" "); } if ((i + 1) % 24 == 0) { rtn.append("\n"); } } } buffer.position(position); return rtn.toString(); } }