Java Archive (JAR)

A Java Archive (JAR) is a single file that packages multiple Java class files, resources, and libraries needed for an application to run. Think of it as a compressed container, similar to a ZIP file, that organizes everything required for a Java program, making distribution and deployment easier. JAR files often include an entry point specified by a special file, allowing the program to start automatically. They facilitate sharing, version control, and efficient deployment of Java applications across different systems, ensuring all components are bundled together and readily accessible for execution.