String text = "Hello, World!"; Assert.hasText(text, "Text must not be empty"); System.out.println("The text is: " + text);
String text = " "; Assert.hasText(text, "Text must not be empty"); System.out.println("The text is: " + text);In this code snippet, the `text` variable contains only whitespace characters, so the `hasText` method throws an `IllegalArgumentException` with the message "Text must not be empty". This method belongs to the `org.springframework.util` package library, which is part of the Spring Framework. It provides various utility classes with helper methods that can be used in a wide range of applications.