Mega Code Archive
Dump an array of bytes in hex form
<![CDATA[
import java.io.File;
import java.io.FileFilter;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*
*/
/**
* Various string manipulation methods that are more efficient then chaining
* string operations: all is done in the same buffer without creating a bunch of
* string objects.
*
* @author <a href="mailto:dev@labs.apache.org">Dungeon Project</a>
*/
public class Main {
/** Hex chars */
private static final byte[] HEX_CHAR = new byte[]
{ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
/**
* Helper function that dump an array of bytes in hex form
*
* @param buffer
* The bytes array to dump
* @return A string representation of the array of bytes
*/
public static final String dumpBytes( byte[] buffer )
{
if ( buffer == null )
{
return "";
}
StringBuffer sb = new StringBuffer();
for ( int i = 0; i < buffer.length; i++ )
{
sb.append( "0x" ).append( ( char ) ( HEX_CHAR[( buffer[i] & 0x00F0 ) >> 4] ) ).append(
( char ) ( HEX_CHAR[buffer[i] & 0x000F] ) ).append( " " );
}
return sb.toString();
}
}
]]>