Unlike eclipse that you can easily export your project into a .Jar file, in JDeveloper, it is not that easy. In Eclipse you just need to use the export option on your project and then let it know where you want your .jar file to be. However, in JDeveloper the story is a little bit different. You need to create a new deployment environment (in project preferences panel) and then from there you should assign where you want your jar file. After doing this step, then you need to right click on your project, then click deploy and you’ll see “to jar file”, tada. Your jar file is ready.
Thanks, it helped me alot!