Understanding Marker Interfaces in Java
In Java, a Marker Interface is an interface that does not contain any methods or fields. It serves as a “tag” or “marker” to give special meaning to the classes that implement it. This way, the Java runtime or compiler can identify those classes and provide them with additional capabilities. 🔹 What is a Marker Interface? A marker interface is essentially an empty interface. When a class implements a marker interface, it tells the JVM that the class should be treated in a particular way. // Example of a Marker Interface public interface Serializable { // No methods or fields } public class Student implements Serializable { private int id; private String name; } Here, the Student class implements Serializable . Even though the interface is empty, the JVM knows that objects of Student can be serialized. 🔹 Popular Examples of Marker Interfaces in Java Serializable – Marks classes so their objects...