![]() ![]() It exists mainly to help the compiler catch mistakes you might have made. Once everything is compiled, the annotation has zero impact on your code. When you mark a method with this annotation, you’re telling Java that method is supposed to have overridden some other method in a superclass. The annotation has no special meaning to the Java compiler-it’s used primarily by the JUnit library.Īnother annotation you might have encountered already is the annotation. Attach extra information that can (sometimes) be inspected during runtime when doing meta-programming related things.Provide compile-time information to certain tools and libraries.Provide information to the Java compiler.Rather, they’re used to do one of the following: They have no direct effect on what the program does when run. By convention and for simplicity, JUnit 5 tests are usually written with default visibility (often called package-private with no public/ private/ protected access modifier).Īnnotations are a form of metadata that you can attach to declarations, types, and certain expressions. (There are some JUnit extensions that allow you to add parameters but you won’t need to use these for our projects.) ![]()
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