Packages in Java: Definition, Types, and Examples
Package in Java A package in Java is a collection of related classes, interfaces, and abstract classes that are grouped together as part of an application. Packages help in organizing code, avoiding name conflicts, and improving maintainability. Types of Packages Packages in Java are classified into two types: 1. Inbuilt Packages 2. User-Defined (Programmer-Defined) Packages 1. Inbuilt Packages Inbuilt packages are predefined packages that are available in the JDK software. These packages usually start with the java keyword. Examples of Inbuilt Packages java.lang java.sql java.io java.util java.net java.time 📌 Note: The java.lang package is imported automatically by the JVM. 2. User-Defined (Programmer-Defined) Packages User-defined packages are created by programmers according to the application requirements. Package Naming Convention com.companyname.applicationname.modulename org.companyname.applicationname.modulename Example package com.example.billing.invoice; Importing a Pac...