Pass information between Jenkins Job builds
There's a simple two step process...
In your originating job, tick step [ X ] Archive the artifacts and set the files to archive.

The files are copied to the master, stored in the jobs folder tree, under the builds directory for each build, along with the log. (Delete the build and it deletes the artifacts that came from it).
Install the Copy Artifact plugin.
Configure the job accordingly.

Despite the plugin's screenshot example, this is actually a bad practice for artifacts like jars. Those should be properly managed using an artifact repository like Nexus or JFrog.
See my response regarding keeping the the Jenkins space under control, managing the build and artifact retention soundly.