What is a package in Java?

A package in Java is a namespace used to organize related classes, interfaces, enums, and sub-packages. It helps structure applications, avoid naming conflicts, and improve code maintainability.

Key Points: • Packages group related classes and interfaces into a logical structure. • They help prevent class name conflicts by providing a unique namespace. • Packages improve code organization and make large applications easier to manage. • Access control can be applied at the package level using Java access modifiers. • Java provides built-in packages such as java.lang, java.util, and java.io, and developers can also create custom packages.

Example: In an e-commerce application, classes related to users can be placed in com.company.user, while payment-related classes can be placed in com.company.payment.

Code Example:

package com.example.employee;

public class Employee {
    void display() {
        System.out.println("Employee Details");
    }
}

Interview Tip: A concise interview answer is:

"A package in Java is a mechanism for grouping related classes and interfaces. It helps organize code, prevents naming conflicts, and improves maintainability in large applications."