What is. Jar

Answer 1

Java Archive.

Answer 2

The .jar files are created by the java archiver, an utility from the JDK. The .jar files contains all the .class files of your finished java project and other files needed for your project to run in the JVM in a convenient way for deployment. Instead of having to copy all the classes and directories structure to your app users, you create the .jar file of your project and it will contain everything that your program needs.

Answer 3

.jar is the extention of packaged java classes. Packaging your java code makes it much more portable !

Answer 4

jar is the extension of java applications usually used in mobile apps