improved ObjectUtils class method
improved StringUtils class method
added test cases for StringUtils class
added method to CollectionUtils class and changed dependent classes
improved StringUtils class method
improved test case for StringUtils class
improved test case for StringUtils class
improved test case for StringUtils class
added comment to CollectionUtils class method
edited test case for ObjectUtils class
improved StringUtils class method
improved test case for StringUtils class
added method to StringUtils class
added method to StringUtils class
improved comment on StringUtils class method
improved comment on StringUtils class method
improved StringUtils class method
added method to ObjectUtils class
improved comment on ObjectUtils class
edited ObjectUtils dependent classes