Here you can find the source of toHexString(byte[] bytes, int offset, int len, int max)
| Parameter | Description |
|---|---|
| bytes | a byte array whose content is to be displayed |
| offset | the offset within the byte array to start at |
| len | the number of bytes |
| max | the maximum number of bytes to be displayed (-1 means no limit) |
public static String toHexString(byte[] bytes, int offset, int len, int max)
//package com.java2s; /*/*from www .ja v a 2 s . c om*/ * (c) copyright 2003-2009 Amichai Rothman * * This file is part of the Java TNEF package. * * The Java TNEF package is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * The Java TNEF package 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ public class Main { /** * Creates a String containing the hexadecimal representation of the given * bytes. * * @param bytes a byte array whose content is to be displayed * @return a String containing the hexadecimal representation of the given * bytes */ public static String toHexString(byte[] bytes) { return toHexString(bytes, 0, bytes != null ? bytes.length : 0, -1); } /** * Creates a String containing the hexadecimal representation of the given * bytes. *<p> * If {@code max} is non-negative and {@code bytes.length > max}, then the * first {@code max} bytes are returned, followed by a human-readable * indication that there are {@code bytes.length} total bytes of data * including those that are not returned. * * @param bytes a byte array whose content is to be displayed * @param max the maximum number of bytes to be displayed (-1 means no limit) * @return a String containing the hexadecimal representation of the given * bytes */ public static String toHexString(byte[] bytes, int max) { return toHexString(bytes, 0, bytes != null ? bytes.length : 0, max); } /** * Creates a String containing the hexadecimal representation of the given * bytes. * <p> * If {@code max} is non-negative and {@code len > max}, then the * first {@code max} bytes are returned, followed by a human-readable * indication that there are {@code len} total bytes of data * including those that are not returned. * <p> * In particular, {@code offset + len} can extend beyond the array boundaries, * as long as {@code offset + max} is still within them, resulting in * {@code max} bytes returned followed by an indication that there are * {@code len} total data bytes (including those that are not returned). * * @param bytes a byte array whose content is to be displayed * @param offset the offset within the byte array to start at * @param len the number of bytes * @param max the maximum number of bytes to be displayed (-1 means no limit) * @return a String containing the hexadecimal representation of the given * bytes */ public static String toHexString(byte[] bytes, int offset, int len, int max) { if (bytes == null) return "[null]"; int count = max > -1 && max < len ? max : len; StringBuffer s = new StringBuffer(); for (int i = 0; i < count; i++) { String b = Integer.toHexString(bytes[offset + i] & 0xFF) .toUpperCase(); if (b.length() == 1) s.append('0'); s.append(b); } if (count < len) s.append("... (" + len + " bytes)"); return s.toString(); } }