What is a POJO? POJO stands for Plain Old Java Object. It is a term used to describe a simple Java class that follows basic coding conventions and does not depend on any specific frameworks or external libraries. In simple words, a POJO is just a normal Java object created to hold and manage data in a clean and straightforward way. Key Features of a POJO A typical POJO usually includes: Private variables (fields) to store data Public getter and setter methods to access and update those fields Optional methods for additional behavior (like toString()) It may also have: A no-argument constructor A parameterized constructor Properties of a POJO A class is considered a POJO if it does not: Extend any predefined class (e.g., HttpServlet, EntityBean, etc.) Implement any predefined interface (e.g., javax.ejb.EntityBean) Contain framework-specific annotations (e.g., @entity , @Component) Example public class Employee { private int id ; private String name ; // Default constructor public Employee () {} //…