How to use the @ Override annotation in java

This article mainly introduces the relevant knowledge of how to use the @ Override annotation in java, the content is detailed and easy to understand, the operation is simple and quick, and has a certain reference value. I believe you will gain something after reading this java @ Override annotation. Let's take a look at it.

Description

1. It does not have any attributes, so it cannot store any other information. It can only be used for methods and will be discarded after compilation.

2. This is a typical tagged annotation that only the compiler knows.

In the process of compiling java files into bytecode, once the compiler finds that a method is modified and annotated, it will match whether the parent class has a function with the same method signature. If not, it will not be able to compile.

Define

@ Target (ElementType.METHOD) @ Retention (RetentionPolicy.SOURCE) public @ interface Override {}

Example

Public class AdminServlet extends HttpServlet {@ Override / / representation method rewrites protected void service (HttpServletRequest req,HttpServletResponse resp) throws ServletException,IOException {req.setCharacterEncoding ("utf-8");}} this is the end of the article on "how to use @ Override annotations in java". Thank you for reading! I believe you all have a certain understanding of "how to use the @ Override annotation in java". If you want to learn more, you are welcome to follow the industry information channel.