Shulou(Shulou.com)05/31 Report--

This article mainly explains how to use the JDK annotation of java. The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn how to use the JDK annotation of java.

1. @ Override: for a method, indicating that the method overrides the parent class method, such as toString ().

/ / # 2.1 JDK5.0 overrides the parent method class Parent1_2 {public void init () {}} class Son1_2 extends Parent1_2 {@ Overridepublic void init () {} / / # 2.2 JDK6.0 implements the parent interface method interface Parent1_3 {public void init ();} class Son1_3 implements Parent1_3 {@ Overridepublic void init () {}}

2. @ Deprecated: indicates that the method is out of date and is not recommended for developers.

/ / # 1 method expires class Parent1_1 {@ Deprecatedpublic void init () {}}

3. @ FunctionalInterface: used for prescribing functional interfaces.

Functional interface: if there is only one abstract method in the interface (which can contain multiple default methods or multiple static methods), the interface is called a functional interface.

@ FunctionalInterfacepublic interface AD {public void adAttack ();} Thank you for your reading. The above is the content of "how to use JDK annotations for java". After the study of this article, I believe you have a deeper understanding of how to use java JDK annotations, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.