Running Java based open source

This is my first time to use Java, and I have no experience in Java, but good experience in .Net

I have downloaded an open source code called ctakes

and downloaded IntelliJ IDE community version

i pointed to the main folder of the project to be opened by IntelliJ IDE

but when i try to run it, it does not work

not sure what the problem is and how to fix it.

I want help in making the code runs successfully, any help appreciated.

Assuming you are talking about this repo, this is a maven based project. In order to import it correctly, follow this link and refer to Open an existing Maven project section.

A maven is a build tool that will automatically download all the dependencies required for the project source and apply them in classpath accordingly.

You might have to install maven first. You can download that from here.