The Java reflection mechanism is a powerful feature in the Java language, which allows programs to dynamically obtain and operate class information at runtime, including fields, methods, constructors, etc. Through reflection, we can explore and operate classes without knowing it at compile time. This article will introduce the basic concepts and practical applications of Java reflection mechanism, and provide corresponding source code examples.
- reflection basics
1.1 Obtaining the Class object
In Java, to use reflection, you first need to obtain the Class object of the class to be operated on. You can use the following three methods to obtain Class objects:
1.1.1 Using the getClass method of an object
For an existing object, you can obtain its Class object by calling its getClass method. For example:
String str = "Hello, Reflection!";
Class<?> clazz = str.getClass(