Replay Java memoirs (10): Java 10 reflection mechanism, Java 10

Replay Java memoirs (10): Java 10 reflection mechanism, Java 10

Reflection: dynamically analyzes java program runtime or uses a class for operations

Java. lang. Class: Class that describes Class information

Class Object: describes the information of a Class. When a jvm loads a Class, a description object (reflecting the information of the current running Class) is generated, which is called a Class object.

 

How to obtain Class objects

The class object can be used to obtain the structure information of a class -- to obtain the composition of the class.

Field Attribute Class: attributes in the class

Method class: Description of a Method

Constructor

Common Methods of Class objects

Purpose: create an object Using Reflection

1. Get Class Object

2. Get the constructor object

3. Get method object

4. Create an object