String name = "John"; String defaultName = StringUtils.defaultString(name); // returns "John"
String name = null; String defaultName = StringUtils.defaultString(name); // returns ""
String name = ""; String defaultName = StringUtils.defaultString(name); // returns "null"To use this method, you need to import the StringUtils class from the org.apache.commons.lang3 package. This package is a part of the Apache Commons Lang library, which provides many useful utilities for working with strings, numbers, dates, and other common data types.