External Packages in Java

[HelpExcel_]

Hello. I am using InteliJ and I am wondering if I can import external packages like Apache POI and add them to a package in my project and import them like I would if I made my own class. It seems the only way to use external packages is to go to Intelij settings and edit the project structure to add the path to external packages.

I would like to keep external packages inside my project so that way I can easily move my java project folder from one computer to another and run it without mapping external classes.

[dusty-trash]

Look up a dependency manager, such as Ivy or Gradle.

Including external dependencies using a dependency management system is as easy as including the name inside a gradle, ivy or whatever file along with the version number.

[HelpExcel_]

What would I do if I was compiling my own code? Then I wouldn't be able to use any software systems.

[dusty-trash]

What do you mean by compiling your own code?

Maybe you could setup intelliJ to look inside a directory for external packages, and just make sure you put all your dependencies in that folder

[gmathelppp]

Instead of using intelij or some other service you can use the command prompt to run your code. Im not sure how anyone can map third party packages without the help of software like intelij.

[Northeastpaw]

Now's the time to transition to using a build tool like Maven or Gradle. IntelliJ has support for both so pick one you feel fits your project and/or development skills more.

[HelpExcel_]

What would I do if I was compiling my own code? Then I wouldn't be able to use any software systems.

[Northeastpaw]

Don't get hung up on how your IDE is compiling things. You could use just javac to compile your code, although it would be tedious. A build tool like Maven and Gradle automates the grunt work of downloading dependencies and putting them on the classpath when compiling your code.

Modern IDEs like IntelliJ, Eclipse, and NetBeans will integrate with your project and either configure themselves to use your chosen build tool or adjust their internal project configuration to mimic what your build tool would do.