1. Description
(1) The essence of annotation is the interface that inherits the Annotation interface. At this point, any annotation category can be back-translated to get the result.
(2) A comment is just a special comment. If you don't analyze its code, it may not even be as good as comments.
2. Example
This is the definition of the annotation @Override. In fact, it is essentially:
public interface Override extends Annotation{
}
The typical annotation @Override, when When the compiler detects a method, and when the compiler detects the @Override annotation, the compiler checks whether the name actually overrides a certain method of the parent, that is, it compares whether the parent has the same method signature.
1. As a representative of static object-oriented programming language, Java language implements object-oriented theory and allows programmers to perform complex programming with an elegant way of thinking.
2.Java has the characteristics of simplicity, object-oriented, distributed, security, platform independence and portability, and dynamic nature.
3. Use Java to write desktop applications, Web applications, distributed systems and embedded system applications, etc.
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