How to use assertions in Java Use Java assertions to document program correctness and more quickly test and debug your programs Getty Images Writing programs that work correctly at runtime can be challenging. This is because our assumptions about how our code will behave when executed are often wrong. Using Java’s assertions feature is one way to verify that your programming logic is sound. This tutorial introduces Java assertions. You’ll first learn what assertions are and how to specify and use them in your code. Next, you’ll discover how to use assertions to enforce preconditions and postconditions. Finally, you will compare assertions with exceptions, and find out why you need both in your code.downloadGet the codeDownload the source code for examples in this tutorial. Created by Jeff Friesen for JavaWorld. What are Java assertions? Before JDK 1.4, developers often used comments to document assumptions about program correctness. Comments are useless as a mechanism for t...
