Java String with all upper case characters

/*/*from   www.j a  va2  s.  co m*/
  Copyright 2009 Semantic Discovery, Inc. (www.semanticdiscovery.com)
    
  This file is part of the Semantic Discovery Toolkit.
    
  The Semantic Discovery Toolkit 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 3 of the License, or
  (at your option) any later version.
    
  The Semantic Discovery Toolkit 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 The Semantic Discovery Toolkit.  If not, see <http://www.gnu.org/licenses/>.
  */
//package com.demo2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        String s = "";
        System.out.println(allCaps(s));
    }

    public static final boolean allCaps(String s) {
        return allCaps(s, 0, s.length());
    }

    /**
       * @return true if all letters in the string are upper case and there is at least one letter.
       */
    public static final boolean allCaps(String s, int startPos, int endPos) {
        boolean allCaps = true;
        boolean foundOne = false;
        for (int i = startPos; i < endPos; ++i) {
            final int c = s.codePointAt(i);
            if (c > 65535)
                ++i;
            if (Character.isLetter(c)) {
                foundOne = true;
                if (!Character.isUpperCase(c)) {
                    allCaps = false;
                    break;
                }
            }
        }
        return allCaps && foundOne;
    }
}

//package com.demo2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        String str = "";
        System.out.println(allCaps(str));
    }/*from   w w  w. j  a  v a  2 s  . c  o  m*/

    /**
     * Returns true if all characters in the String are upper case.
     * 
     * @param str
     *            the String to check
     * @return true, if all characters are upper case. Else false.
     */
    public static boolean allCaps(String str) {
        int charCount = str.length();
        for (int i = 0; (i < charCount); i++) {
            char ch = str.charAt(i);
            if (!Character.isUpperCase(ch)) {
                return false;
            }
        }
        return true;
    }
}