Overview of Reflection API in Java | Uses of Reflection | Online Java Training Videos By H2KInfosys

Overview of Reflection API in Java | Uses of Reflection | java Training Videos || H2Kinfosys

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The Reflection API in Java is a powerful mechanism that allows programs to inspect, analyze, and manipulate the structure and behavior of classes, objects, methods, and fields at runtime. With the Reflection API, developers can retrieve information about classes, interfaces, constructors, methods, and fields, even if these elements are not known at compile time. This introspection capability facilitates tasks such as building tools, frameworks, and libraries that require dynamic behavior and interaction with classes whose details are only available during program execution.

The Reflection API provides classes like Class, Method, and Field that expose methods to query and manipulate class and member details. This API is used in various scenarios, including dynamic loading of classes, accessing and modifying private members (though caution is advised), implementing annotations and annotations processing, and creating frameworks like serialization or dependency injection containers. However, due to its runtime nature, the Reflection API can incur performance overhead and may make code less readable if used excessively, so it's important to use it judiciously and carefully consider its implications.

• Reflection is the process of analyzing the capabilities of class at runtime
• That is analyzing the details about the class which includes the methods in the class, the variables of the class, the constructors in the class, the interface that the class is implementing, the methods that are coming from the interface.
• To gather all the above details, java provides the REFLECTION API.
• REFLECTION API is not for project development but used for PRODUCT development

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