#Java reflection example program how to#
#Java reflection example program software#

Notice the statement, Class obj d1.getClass () Here, we are creating an object obj of Class using the getClass () method. Here, we are trying to inspect the class Dog. Constructor – This is also a final class available in package. In the above example, we have created a superclass: Animal and a subclass: Dog.Field – This is also a class final which is available in package.Method – This is a final class which is available in package.Reflection code destroys the abstractness of Java program structure, so when the program running platform changes, because the abstract logical structure can not be recognized, the effect of code will be different from before. Class – This is a final class available in java.lang package. Reflection allows code to perform operations that are usually not allowed, so using reflection can lead to unexpected consequences.Some predefined API which frequently used in Reflection mechanism.

#Java reflection example program software#

Activating annotation based null pointer access analysis. Reflection is used for many things: IDEs / software analysis tools. We can access private fields outside of class. Simple use NonNull in your code and use Ctrl+1 to add the required dependency.While using reflection it may result as a performance issue.To IDE development like an eclipse, IntelliJ, STS.Sometimes reflection also useful to write JUnit for private methods( see examples).Remember to check the JavaDoc from Sun out too. This text will get into more detail about the Java Field object. We can define our framework/custom utility methods using reflection, which can be used later in our development. Using Java Reflection you can inspect the fields (member variables) of classes and get / set them at runtime.We can access private members using reflection( see examples).We can get information about class members(fields, constructors and methods) using reflection API( see examples).Reflection is a way to change the behavior of a class at runtime using different predefined API.

#Java reflection example program how to#

Also, we will see how to use reflection in a real-time scenario. In this post, we will see what is a reflection in java with example and what are the benefits.