Mega Code Archive
Test if the current character is a digit digit
<![CDATA[
import java.io.File;
import java.io.FileFilter;
import java.io.UnsupportedEncodingException;
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 {
/** '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9' */
private static final boolean[] DIGIT =
{
false, false, false, false, false, false, false, false,
false, false, false, false, false, false, false, false,
false, false, false, false, false, false, false, false,
false, false, false, false, false, false, false, false,
false, false, false, false, false, false, false, false,
false, false, false, false, false, false, false, false,
true, true, true, true, true, true, true, true,
true, true, false, false, false, false, false, false,
false, false, false, false, false, false, false, false,
false, false, false, false, false, false, false, false,
false, false, false, false, false, false, false, false,
false, false, false, false, false, false, false, false,
false, false, false, false, false, false, false, false,
false, false, false, false, false, false, false, false,
false, false, false, false, false, false, false, false,
false, false, false, false, false, false, false, false
};
/**
* Test if the current character is a digit <digit> ::= '0' | '1' | '2' |
* '3' | '4' | '5' | '6' | '7' | '8' | '9'
*
* @param byteArray
* The buffer which contains the data
* @return <code>true</code> if the current character is a Digit
*/
public static final boolean isDigit( byte[] byteArray )
{
if ( ( byteArray == null ) || ( byteArray.length == 0 ) )
{
return false;
}
else
{
return ( ( ( ( byteArray[0] | 0x7F ) != 0x7F ) || !DIGIT[byteArray[0]] ) ? false : true );
}
}
}
]]>