String str1 = " hello world "; String trimmedStr1 = StringUtils.trim(str1); // "hello world" String str2 = "\t goodbye "; String trimmedStr2 = StringUtils.trim(str2); // "goodbye"In the first example, the `trim()` method removes the leading and trailing spaces from the string " hello world " to produce "hello world". In the second example, it removes the leading tab character and trailing spaces from the string "\t goodbye " to produce "goodbye". To use the `StringUtils` class, you need to include the `commons-lang3` library in your project. This library provides a wide range of utility classes and methods for working with various types of objects in Java.