![]() Test harnesses can make use of reflection to systematically call a discoverable set APIs defined on a class, to insure a high level of code coverage in a test suite. Debuggers and Test Tools: Debuggers need to be able to examine private members on classes.The class has methods for reading information about the method (name, modifiers, parameter types, return type, and thrown exception types) and invoking the method for a given object. Visual development environments can benefit from making use of type information available in reflection to aid the developer in writing correct code. The Method class represents a reflected static or an instance method. Class Browsers and Visual Development Environments: A class browser needs to be able to enumerate the members of classes.An instance method is invoked by using the object reference. Extensibility Features: An application may make use of external, user-defined classes by creating instances of extensibility objects using their fully-qualified names. We can invoke a static method by using its class reference.With that caveat in mind, reflection is a powerful technique and can enable applications to perform operations which would otherwise be impossible. Java Reflection API provides us information about a Class to which the Object belongs to including the methods in this class. This is a relatively advanced feature and should be used only by developers who have a strong grasp of the fundamentals of the language. Reflection is commonly used by programs which require the ability to examine or modify the runtime behavior of applications running in the Java virtual machine. It can (for example) call a method by using a string for its name. Take an in-depth look at the Java Reflection API The obvious way for a framework read that getter at runtime, without knowing it in advance, is through Java Reflection: Adding the setAccessible (true) call makes these reflection calls faster. ![]()
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