Difference Between JAR and WAR

Difference Between JAR and WAR

Human life has become increasingly dependent on technology in various forms, including mobile phones and other electronic gadgets, as well as various types of machinery, vehicles, and other modes of transportation. It will be extremely difficult for the next generation to live without these modern conveniences.

To make use of such technologies, one does not need to be an expert; instead, one only requires information about the gadget or machinery in question and they are ready to go. For example, a mobile phone can be used by people of any age group with ease, from a 2-year-old child to an 80-year-old person; the functionality of devices has been made so simple through several modifications, which are done to make it suitable for people of all ages.

There are several functions in devices such as mobile phones or laptops that are not used by everyone but are critical components of the device, and only a small number of technical experts are aware of them because they are not used on a daily basis by the average person, such as archive files, zip folders, and so on.


WAR is a file format and acronym that is used for web application archive files. JAR is a file format and acronym that is used for java archive files, and it is used to aggregate numerous java class files and attach metadata and resources in a single file for distribution. In technical terms, it is a collection of distinct files that are used to distribute a collection of JAR files, Java server pages, Java Servlets, Java classes, XML files, static web pages, and other types of files. It is also referred to as a jar file.

Web application archive (WAR) files are restricted to web apps, while JAR files may include a variety of files and be used to store them. Despite the fact that they are both sorts of archive files, their accessibility is distinct.

What exactly is JAR?

It is a file format, often known as an acronym, that is used to aggregate numerous Java class files and associate information and resources in a single file for distribution. JAR is an abbreviation that stands for Java archive files. We are a built-in ZIP format with a JAR file extension, which means we are portable. It is used to compress files in the same way as one may do in a ZIP folder, to put it another way. Generally speaking, it may be used as a broad archiving tool inside devices.

Although the JAR file often includes a variety of directories, audio files, and other media files, the result demonstrates that JAR files also contain a manifest default file, which is automatically included in the archive by the JAR tool. They are often found in libraries, which explains why these sorts of files are so simple to find and utilize.

A JAR file is a package file format, and an EJB module is packed with a JAR file. EJB modules comprise EJB descriptors and java class bean files, and they are packaged with JAR files, which is the package file format. Manually creating JAR files is also an option. Working with files is made more straightforward and error-free by using Python classes that surround file descriptors, which are called objects in files.

JAR files are the only archive format that works across several platforms. If you install the Java 2 runtime environment on Microsoft Windows, the installation tool registers a default association for JAR files, which means that any JAR file on your desktop will be automatically executed with the Java JAR. The dependent extensions that are associated with the apps will be automatically loaded.

What exactly is WAR?

WAR is a file type that stands for web application archive files, which is an abbreviation. According to technical terms, it is a collection of different files that are used to distribute a collection of JAR files, Java server pages, Java Servlets, Java classes, XML files, static web pages, and other resources that make up a web application, in other words, everything that makes up a web application.

The benefit of utilizing a WAR file is that it consolidates all of the files into a single unit, which reduces the amount of time it takes for the user to move a file from one client to another. Manually creating WAR files is also an option. JSP engines or servlets use WAR files to deliver their applications. There is also a WEB-INF directory, which includes the Web.xml file, which is a deployment descriptor, in this kind of file

The directory structure of a web application is divided into two types: the first is made up of HTML/XML files, which are primarily images, videos, JSP pages, applets, and so on, and the second is made up of the WEB-INF directory, which contains tag library descriptor files and the deployment descriptor, among other things.

WAR files are compressed and bundled with the WAR extension, and they may include GIFs as well. WAR files may be found in the web applications directory of the webserver. WAR files may include a variety of resources that are used by various programmers, which may be a nuisance. To make use of files included inside WAR files, the user must first unzip the folder in which they are contained.

Difference Between JAR and WAR

  • JAR files are packed with the jar extension, while WAR files are bundled with the WAR extension.
  • JAR files may include a variety of files, but WAR files are only applicable to web-based applications.
  • In contrast to JAR files, which contain EJB modules, WAR files include JSP files, servlets, HTML, GIF, and other types of files.
  • WAR files, on the other hand, maybe formed from servlets and have a specified format, but JAR files can be created manually with any format.
  • JAR files are simple to access; on the other hand, WAR files are comprised of a variety of files that might be difficult to navigate for the user.


JAR and WAR files are two distinct file types that may both be produced manually but from a variety of various file formats.

Both programmers operate in ZIP format, however, the files they contain are of a different kind than one another. There are several distinctions between the two groups.

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