This will resize your JTable column width based on the contents of the header and data.

Apparently there’re some codes scattered on the net telling people that you can print to a Zebra printer by sending ZPL II codes using PrintService. But the problem is, it’s not working, I don’t know why, maybe because of a different version of printer or model but I’m pretty sure the thing that came out from the printer are just ordinary texts not barcode which is what the code was supposed to output.

This guide is more towards Netbeans project, but it can be used as a reference for you to customize the script to suit your needs.