What is your experience with using reflection in programming?

Reflection in Java allows for dynamic exploration and modification of class structures, methods, and fields at runtime. I used reflection to create universal libraries, for example, for serializing objects into JSON, where it was necessary to traverse object fields without knowing their structure in advance.

Example of using reflection to invoke a method by name:

import java.lang.reflect.Method;

public class ReflectionExample {
    public void sayHello() {
        System.out.println("Hello, reflection!");
    }

    public static void main(String[] args) throws Exception {
        ReflectionExample obj = new ReflectionExample();
        Method method = obj.getClass().getMethod("sayHello");
        method.invoke(obj); // calling sayHello method via reflection
    }
}

Reflection is useful for frameworks, testing, dynamic class loading, but it should be used with caution due to performance and security concerns.