asked on

Add Class file to existing Jar File

I have an existing Jar File:
chop_saw.jar

With the following directories and files:
Ebtron
-mechanicalFunctions.class
-EbtronUser.class
-ebtronModel.class
-chopSaw.class
-chopSaw$Display.class
-chopSaw$3.class
-chopSaw$2.class
-chopSaw$1.class

META-INF
-MANIFEST.MF
"Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.2
Created-By: 1.5.0_04-b05 (Sun Microsystems Inc.)
Main-Class: Ebtron.chopSaw
X-COMMENT: Main-Class will be added automatically by build"

Now my question, is it possible to replace one of the class files? I updated "mechanicalFunctions.class". Can I add the new "mechanicalFunctions.class" file and replace the existing one without changing any of the other files. Add would the jar file still work as a clickable executable as before?

Thankx

MicheleMarcon

The .jar file are basically zipped file

So:
Unzip the jar in a folder.

Replace the .class file you want

Zip the folder to a .jar file

I already did that.

MicheleMarcon

With Linux, you would do this:

unzip chop_saw.jar
cp mechanicalFunctions.class Ebtron
zip chop_saw.jar Ebtron

SaltyDawg

ASKER

If I unzip the file, then replace the class, how do I create a new jar file? Is there an application that creates one. I cannot do it using WinZip or WinRar.

ASKER CERTIFIED SOLUTION