What is the TN5250J Emulator?
The TN5250J java application is an IBM i 5250 terminal emulator written in Java. Originally created because there was no AS4000/iSeries terminal emulator for Linux with features like continued edit fields, GUI windows, cursor progression fields etc.

Decades later this emulator still works perfectly on the latest IBM i Systems.
Go and download the latest version from tn5250j.org or grab it directly from GitHub.
Or just download my copy of TN5250J V0.7.6 (in case the original website ever Vanishes)