Mega Code Archive
Check whether the given String is a valid identifier according to the Java Language specifications
<![CDATA[
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLDecoder;
import java.util.Map;
/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
public class Main{
/**
* Check whether the given String is a valid identifier according
* to the Java Language specifications.
*
* See The Java Language Specification Second Edition, Section 3.8
* for the definition of what is a valid identifier.
*
* @param s String to check
*
* @return <code>true</code> if the given String is a valid Java
* identifier, <code>false</code> otherwise.
*/
public final static boolean isValidJavaIdentifier(String s)
{
// an empty or null string cannot be a valid identifier
if (s == null || s.length() == 0)
{
return false;
}
char[] c = s.toCharArray();
if (!Character.isJavaIdentifierStart(c[0]))
{
return false;
}
for (int i = 1; i < c.length; i++)
{
if (!Character.isJavaIdentifierPart(c[i]))
{
return false;
}
}
return true;
}
}
]]>