Java annotation and reflection mechanism

1. Notes 1.1 introduction to notes Annotation is a new technology introduced by JDK 5.0. Its main functions are: Explain the procedure and it is not a procedure itself (this function is the same as that of annotation); It can be read by other programs (such as compiler, etc.). Annotation format: annotations exist in the code in the format o ...

Posted by lip9000 on Tue, 24 May 2022 19:24:08 +0300

Java implementation of custom annotation development

First, let's take a look at the standard example of custom annotation. The annotation class is decorated with the @ interface keyword, and the annotation related information is declared above the annotation class, including the following four types of information @Documented – will annotations be included in JavaDoc @Retention – w ...

Posted by rcity on Mon, 23 May 2022 18:30:40 +0300

Serialization, Reflection in Java SE Basic Java

Serialize and deserialize All are to complete the operation of Java objects, write the Java objects to the file of the local hard disk, and restore the Java objects stored in the local file to the Java memory; Serialization refers to outputting objects in memory to the hard disk for storage, while deserialization is the opposite operation, r ...

Posted by lill77 on Wed, 18 May 2022 09:59:22 +0300

Definition, creation and use of annotations in java

1. Annotation overview What is an annotation: Annotation annotation is a code-level description. It is a feature introduced by JDK1.5 and later versions, and it is at the same level as classes, interfaces, and enumerations Contrast notes: ​ Comments are for programmers, and comments are for programs. (Annotations will not affect the normal e ...

Posted by kingbeastie on Fri, 29 Apr 2022 20:04:31 +0300

Reflection mechanism of advanced Java

1> Basis of reflection mechanism 1.1 function of reflection mechanism adopt java The reflection mechanism in the language can manipulate bytecode files. The advantages are similar to hackers. (bytecode files can be read and modified.) Code fragments can be manipulated through reflection mechanism. ( class File.) 1.2 related classe ...

Posted by yellowepi on Sun, 10 Apr 2022 23:47:56 +0300

Annotation and reflection

Annotation and reflection annotation Function: it can be read by other programs, not the program itself, and can explain the program. You can also add comments by using the parameter name: @ Where Annotation is used: it is attached to package, class, method, field, etc., which is equivalent to adding additional auxiliary information. The ac ...

Posted by burfo on Fri, 01 Apr 2022 22:26:50 +0300

Java Foundation Series: Reflection

Earthly Wanderer: a procedural ape focusing on technical research What I said earlier As an ancient and basic technology in Java, I think we still need to understand it reflex Reflection is the technology of analyzing class properties and methods through binary bytecode Class loading process loading Loading the class file into memory t ...

Posted by Megalink on Thu, 31 Mar 2022 15:53:49 +0300

Reflection and annotation

1, Reflection 1.1 reflection introduction • when compiling, you know the specific information of the class or object. At this time, you can directly operate the class and object without reflection • if the compiler does not know the specific information of the class or object, what should be done at this time? Use reflection ...

Posted by polarbear66 on Thu, 31 Mar 2022 04:46:02 +0300