Here you can find the source of toUpperCase(final String s)
public static String toUpperCase(final String s)
//package com.java2s; //License from project: Apache License public class Main { /**/*from www.j a v a2 s . com*/ * GWT 1.5.3 does not support Locale in String toUpperCase. This method is used * so all calls to toUpperCase can be replaced with properly localized version. */ public static String toUpperCase(final String s) { return s.toLowerCase(); } /** * GWT 1.5.3 does not support Locale in String toLowerCase. This method is used * so all calls to toLowerCase can be replaced with properly localized version. */ public static String toLowerCase(final String s) { return s.toLowerCase(); } }