Java Reflection Explained: Dynamic Class Inspection and Usage

Java Reflection allows dynamic inspection of classes, methods, and fields at runtime. It is often used in frameworks and libraries to manipulate code without knowing the class details at compile time. Reflection is powerful but should be used cautiously as it impacts performance.

Here’s an example of using reflection to access a private field:

class Example {
    private String data = "Hello";
}

Example obj = new Example();
Field field = Example.class.getDeclaredField("data");
field.setAccessible(true);
System.out.println(field.get(obj));

In this example, reflection is used to access the private field `data`. While reflection provides flexibility, it should be used sparingly to avoid security and performance issues.