Interview Question: What is the difference between EAR, JAR and WAR file?

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Question:What is the difference between EAR, JAR and WAR file?

Answer:

J2EE defines three types of archives:

1. Java Archives (JAR) A JAR file encapsulates one or more Java classes, a manifest, and a descriptor. JAR files are the lowest level of archive. JAR files are used in J2EE for packaging EJBs and client-side Java Applications.

2. Web Archives (WAR) WAR files are similar to JAR files, except that they are specifically for web applications made from Servlets, JSPs, and supporting classes.

3. Enterprise Archives (EAR) ”An EAR file contains all of the components that make up a particular J2EE application.

 

 

 

 



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