JAR (Java Archive)

A JAR (Java Archive) is a file format used to package multiple Java class files, libraries, and resources into a single, compressed file. Think of it as a digital container that organizes everything needed for a Java application to run efficiently. This simplifies distribution, installation, and updates, since all components are bundled together. JAR files can be executed directly if they contain a special file called a manifest, which tells the Java Runtime Environment how to start the application. Overall, JAR files improve portability and ease in managing Java programs.