/*
* Copyright 2006 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.util.tools.shared;
/**
* String utility methods.
*/
public class StringUtils {
public static char[] HEX_CHARS = new char[] {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D',
'E', 'F'};
/**
* A 4-digit hex result.
*/
public static void hex4(char c, StringBuffer sb) {
sb.append(HEX_CHARS[(c & 0xF000) >> 12]);
sb.append(HEX_CHARS[(c & 0x0F00) >> 8]);
sb.append(HEX_CHARS[(c & 0x00F0) >> 4]);
sb.append(HEX_CHARS[c & 0x000F]);
}
/**
* Returns a string representation of the byte array as a series of
* hexadecimal characters.
*
* @param bytes byte array to convert
* @return a string representation of the byte array as a series of
* hexadecimal characters
*/
public static String toHexString(byte[] bytes) {
char[] hexString = new char[2 * bytes.length];
int j = 0;
for (int i = 0; i < bytes.length; i++) {
hexString[j++] = HEX_CHARS[(bytes[i] & 0xF0) >> 4];
hexString[j++] = HEX_CHARS[bytes[i] & 0x0F];
}
return new String(hexString);
}
}