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I got a jar file that is packaged with source code in it. I want to load it as a top-level project and start working on the source code. How can I do that in Eclipse?

For example: if I have helloworld.jar, when I import this jar. I want to have the project name as helloworld, with all the packages and src inside it.

I do not want that code on build path.but on my IDE to work with.

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4 Answers 4

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Create a directory named "helloworld" and unpack the JAR into that directory:

mkdir helloworld cd helloworld jar xvf ../helloworld.jar

You can then create a project from existing sources and start operating on that. I don't think Eclipse will let you create a project and change files directly in the JAR.

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Thanks. I was struggling with ways to see if eclipse automatically does it. but nevertheless, what you suggested is not very tedious
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@eagertoLearn Yes. Eclipse does this in a very easy way than suggest by @Erik Gillespie.

Use Import from archive file feature in eclipse. Refer this post https://stackoverflow.com/a/11983201/1391924

Supported archive file types:

  • *.jar
  • *.zip
  • *.tar
  • *.tar.gz
  • *tgz
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Right click on the .jar and choose open with -> winrar (or another archiver) and then click extract.

From there you can import the folder in Eclipse as a new project.

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I was able to import the jar file contents using the following steps:

  1. Create a new java project
  2. Import jar file using file>import>general>archive file option
  3. Move the folder containing source code into the src folder using drag and drop
  4. Run the class containing the main method
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