How to merge a.jar,b.jar,c.jar,d.jar into one single jar called e.jar in eclipse IDE project? can you tell the steps to do this?

Question

In my project I'm using many jar fiels to support the project..as the number of jar files increases I want to move all jar files into a single jar and make use of that.can you provide me useful links that can help me to do this.

Why? For example, do you want to end up with a runnable jar? — Thilo, Nov 07 '11 at 06:13
Before you do, make sure the different library licenses allow you to. — Paul Webster, Nov 07 '11 at 13:08

score 3 · Answer 1 · answered Nov 07 '11 at 06:14

Plenty of options -

In Eclipse you can

Create a normal java project with a sample main class
Add jar files to the project
Export it as a runnable jar, which should repackage the all the jars into one.

Do it through an ant task -

<jar destfile="combined.jar">
  <zipgroupfileset dir="lib" includes="*.jar" /> 
</jar>

More tools like jarjar, onejar (and many more) etc are available to do the repackaging.

score 2 · Answer 2 · edited May 23 '17 at 11:44

2

If you are willing to use ant (which can be called from Eclipse) there are some solutions in this other question here: Clean way to combine multiple jars? Preferably using Ant

I also like proguard, which combines jars and also strips out unused code.

edited May 23 '17 at 11:44

Community

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answered Nov 07 '11 at 06:12

Eamonn O'Brien-Strain

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score 0 · Answer 3 · answered Nov 07 '11 at 07:36

I would recommend you use a maven pom file to maintain your dependancy's. It has a pretty steep learning curve at first, but once you get the hang of it it makes your life so much easier. You would just add all your dependencies in the pom and maven would download and maintain them itself.

How to merge a.jar,b.jar,c.jar,d.jar into one single jar called e.jar in eclipse IDE project? can you tell the steps to do this?

3 Answers3