05. Building Java Applications

Building Java Applications

Building Java Applications

After compiling a Java application into .class files, you can package them together to mark a variety of different types of archives. These archives are designed to run in different environments.

Java Archive Files (JAR)

A **JAR **file is just a zip file full of java bytecode, in the form of a bunch of .class files. It also contains a directory called META-INF, which holds a file containing program metadata, called MANIFEST.MF.

Web Archive Files (WAR)

A WAR is designed to be deployed to a Java Web Application Server. It contains all the files necessary for the application server to host your web application.

Android Package Files (APK)

An APK another variation of a JAR that also contains a number of files that specifically describe how this application should run on Android.

Demo