Some people claim that all Generics information is lost at runtime. This chapter will also clear up some of the confusion out there about what Generics information is available at runtime. It will also show you how to do more specific tasks, like reading all getter methods of a class, or accessing private fields and methods of a class. This chapter will explain the basics of Java Reflection including how to work with arrays, annotations, generics and dynamic proxies, and how to do dynamic class loading and reloading. This is not possible by simply creating an object by using new operator. Hence, we can instantiate class from outside. We can create an object of a class having private constructors as well, from outside a class. We can create objects dynamically by using reflection Java Reflection makes it possible to inspect classes, interfaces, fields and methods at runtime, without knowing the names of the classes, methods, etc. Important points to remember about Reflection: We will be able to solve the above given requirement at a later stage of this chapter once we understand reflection completely. To solve this requirement we must use reflection. Tomorrow, any addition of client causes our code to change. We will go on writing code as shown above EmployeeTest.java Let’s say there are many clients and their requirements will be different. To fulfill the above given requirement, we will follow the steps given below : package If you observe order of methods of every client, you’ll find that they’are all different.
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