/**
* Copyright (C) 2007 Google Inc.
*
* This library 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 library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* String utilities.
*
* @author maxr@google.com (Max Ross)
*/
public class StringUtil {
/**
* Helper function for null, empty, and whitespace string testing.
*
* @return true if s == null or s.equals("") or s contains only whitespace
* characters.
*/
public static boolean isEmptyOrWhitespace(String s) {
s = makeSafe(s);
for (int i = 0, n = s.length(); i < n; i++) {
if (!Character.isWhitespace(s.charAt(i))) {
return false;
}
}
return true;
}
/**
* @return true if s == null or s.equals("")
*/
public static boolean isEmpty(String s) {
return makeSafe(s).length() == 0;
}
/**
* Helper function for making null strings safe for comparisons, etc.
*
* @return (s == null) ? "" : s;
*/
public static String makeSafe(String s) {
return (s == null) ? "" : s;
}
/**
* @return the string provided with its first character capitalized
*/
public static String capitalize(String s) {
if (s.length() == 0) {
return s;
}
char first = s.charAt(0);
char capitalized = Character.toUpperCase(first);
return (first == capitalized)
? s
: capitalized + s.substring(1);
}
}