Demystifying Dynamic Proxy in Java: A Comprehensive Guide

source : pingrunhuang.github.io

Dynamic proxy in Java is a powerful mechanism that allows you to create proxy instances dynamically at runtime. Understanding this concept is essential for Java developers, as it enables advanced programming techniques such as aspect-oriented programming (AOP) and remote method invocation (RMI). In this comprehensive guide, we will delve deep into dynamic proxy in Java, explaining each component thoroughly and providing numerous code examples to illustrate its usage.

Understanding Dynamic Proxy
Let’s break down the term “dynamic proxy” into its two components:

Proxy: In software engineering, a proxy is a class functioning as an interface to another class or object. It acts as a placeholder or surrogate, controlling access to the target object.

Dynamic: The term “dynamic” implies that the proxy is created at runtime rather than being statically defined at compile time. This dynamic creation allows for flexibility and adaptability in the code.

Java Dynamic Proxy API
Java provides the java.lang.reflect.Proxy class to create dynamic proxy instances. This class is part of the Java Reflection API, which allows programs to inspect and manipulate classes, interfaces, fields, and methods at runtime.