Mastering Spring Framework Fundamentals - Understanding the Java Development Kit (JDK) Dynamic Proxies

The video tutorial explains how to use Java's Reflection API to create dynamic proxies. It begins with an introduction to dynamic proxies and their purpose. The tutorial then guides through creating a dynamic proxy using the InvocationHandler interface, implementing it with a factory method, and testing it with method interception. Finally, it demonstrates enhancing the proxy with additional methods and functionality, highlighting the advantages of dynamic proxies over static ones.

What is the primary purpose of using the Java Reflection API in the context of dynamic proxies?

• To intercept method calls and add functionality

• To enhance the performance of Java applications

• To simplify the syntax of Java code

• To compile Java code at runtime

Which interface must be implemented to create a dynamic proxy in Java?

• Cloneable

• Serializable

• Runnable

• InvocationHandler

What method is used to intercept method calls in a dynamic proxy?

• run

• call

• invoke

• execute

What additional functionality is demonstrated in the dynamic proxy example?

• Logging method execution time

• Validating method inputs

• Encrypting method arguments

• Caching method results

How does the dynamic proxy handle method invocations?

• By directly calling the method on the original object

• By creating a new instance of the method

• By using the invoke method on the delegate

• By bypassing the method call entirely

What is a key advantage of using dynamic proxies over static proxies?

• They are easier to debug

• They require less memory

• They allow adding new methods without extra coding

• They improve application performance

What happens if a new method is added to the interface when using dynamic proxies?

• The proxy needs to be rewritten

• The proxy automatically handles the new method

• The application will crash

• The new method will be ignored