java反射示例（Java reflection example）.docVIP

java反射示例（Java reflection example） First, what is reflection?: The concept of reflection was first proposed by Smith in 1982, mainly referring to the ability of a program to access, detect, and modify its own state or behavior. The concept raised a great deal of research on the application of reflectivity in computer science. It was first used in the domain of programming language, and achieved results in Lisp and object oriented. Among them, LEAD/LEAD++, OpenC++, MetaXa and OpenJava are the language based on reflection mechanism. More recently, the reflection mechanism has also been applied to windows, operating systems, and file systems. Reflection itself is not a new concept, although computer science gives new meaning to the concept of reflection. In the field of computer science, reflection is a class of applications that can be self described and self controlled. That is to say, this kind of application by some mechanism to achieve on their own behavior (self-representation) and monitoring (examination), and can according to their own behaviors and results, adjust or modify the application described behaviors and related semantic. Two. What is class reflection in Java?: Reflection is one of the features of the Java programming language, which allows the running Java program to check itself, or self auditing, and to directly manipulate the internal attributes and methods of a program. This capability of Java is not used very much in practical applications, but in other programming languages there is no such thing. For example, in Pascal, C, or C++, there is no way to obtain information about function definitions in programs. Reflection Java is regarded as a dynamic (or quasi dynamic) language key allows the program to execute Reflection APIs class internal information of any known names, including package, type, parameters superclass, implemented interfaces, inner classes, outer class, fields, constructors, methods, modifiers, and in the implementation phase of