The Java Archive (JAR) and the Web Archive (WAR) are two different file formats used for distributing Java applications. The JAR format is mainly used for libraries, while the WAR format is mainly used for web applications. In this article, we will discuss the difference between JAR and WAR files, and we will show you how to create a JAR file and a WAR file.
What is JAR?
JAR is a file format that is used to bundle together multiple files into a single unit. JAR stands for Java Archive, and it is a platform-independent format that can be used on any operating system. JAR files are typically used to distribute Java applications, but they can also be used to package other types of files. JAR files are similar to ZIP files, but they use a different compression algorithm. JAR files can be opened with any ZIP file opener, but not all ZIP file openers can open JAR files. JAR files can also be executed directly by Java Runtime Environment (JRE). JAR file associations are typically set up automatically when JRE is installed, but they can also be set up manually. JAR files have a “.jar” extension.
What is WAR?
WAR Web Archive ( WAR) is a digital collection of websites and web pages that have been preserved for historical purposes. The WAR system is used by libraries, archives, and other cultural institutions to store and manage their digital collections. WAR contains an extensive range of websites and web pages from around the world, including government websites, news websites, and personal websites. WAR is a valuable resource for researchers and historians, as it provides access to a wide range of primary sources. WAR is also open to the public, providing anyone with an interest in history with the opportunity to explore the world’s digital heritage.
Difference between JAR and WAR
JAR and WAR are two file formats used for packaging Java applications. JAR stands for Java Archive, and containsJava class files and associated metadata. JAR files can be run using the java command without unpacking them, making them convenient for distributing Java applications. WAR files, on the other hand, are used for web applications. They contain all the necessary resources for a web application, including JSPs, HTML files, and JavaScript files. WAR files are deployed to a servlet container, such as Tomcat or Jetty, where they can be executed. JAR and WAR files both have their own advantages and disadvantages, but JAR is more commonly used for general-purpose Java applications while WAR is more suited for web applications.
Conclusion
So, what is the difference between JAR and WAR? The main difference is that a JAR file contains all of the classes needed to run an application, while a WAR file only contains the files necessary to deploy an application on a web server. Additionally, a WAR file can be exploded into its constituent files and directories, while a JAR cannot. Finally, when you create a JAR file using the jar command line tool, the resulting archive will have the .jar extension. When you create a WAR file using the war command line tool, the resulting archive will have the .war extension.
