Define Jar,War,Ear file

Ramakrishna — Sat, 04 Apr 2009 19:04:02 +0000

Q) What is EAR file

Rep) Enterprise Archive file. A JAR archive that contains a
J2EE application.

Q) What is JAR file

Rep) Java Archive file it contains a J2EE application.

You can create a JAR file using the command

jar cf XYZ.jar *.class *.gif

if will compress all the .class files and the related gif files to the one file called jar

You can extract the JAR file using the command

jar xf XYZ.jar

Updating the existing JAR file

jar -uf XYZ.jar file1.class

Q) What is WAR file

Rep) Enterprise Archive file. A JAR archive that contains a
J2EE application.

You can create a WAR file using the command

jar -cfv XYZ.war

You can extract a WAR file using the command

jar -xfv XYZ.war

Java Interview Questions » Define creating and extracting of jar