Java Reflection Tutorial with HashMap | Inspect Class, Methods, Fields, Constructors & Annotations
In this video, we explore Java Reflection with a real-world example using the HashMap class from the Java Collections Framework. Reflection allows us to inspect and manipulate the internal structure of Java classes at runtime.
What you'll learn:
What is Java Reflection and why it's useful
How to get class metadata at runtime
How to list all constructors, methods, fields, and annotations
How to create a new instance dynamically using newInstance()
How to check superclass, interfaces, and internal structure
📌 Covered Reflection Methods:
getConstructors()
getDeclaredMethods()
getAnnotations()
getDeclaredFields()
getSuperclass()
getConstructor().newInstance()
👨💻 Whether you're preparing for interviews, learning advanced Java, or building frameworks like Spring, understanding reflection is critical.
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