Java Reflection mechanism

The Java reflection mechanism is in the running state, for any class, can know all the properties and methods of this class, for any one object, can call any of its methods and properties; This dynamically acquired information and the ability to dynamically invoke the object's methods are called the reflection mechanisms of the Java language.

Dynamic language means that a program can change its structure at run time: New functions can be introduced, existing functions can be deleted, and so on structure changes. For example, the well-known ECMAScript (JavaScript) is a dynamic language. In addition, such as Ruby, Python and so on are also dynamic languages, and C, C + + Java and other languages are not dynamic language.

The class class is constructed by private, which is created by the JVM.

Reflection is a feature of the Java language that allows programs to self-check and manipulate internal members at runtime (note that it is not compiled). For example, it allows a Java class to fetch all of his member variables and methods and display them. This ability of Java may not be used much in practical applications, but it does not exist in other programming languages at all. For example, there is no way to get information about a function definition in a program in Pascal, C, or C + +. (from Sun)

JavaBean is one of the practical applications of reflection, which enables some tools to visualize the operation of software components. These tools dynamically load and get the properties of the Java component (Class) through reflection.

Reference Blog: http://www.cnblogs.com/hxsyl/archive/2013/03/23/2977593.html

Java Reflection mechanism