How to get an affordable code signing certificate to sign jars? – Knowledge Base – Qoppa Java PDF API SDK & Server Products
Can't open “.jar” files after Java update on macOS - Super User
java sign 1.2.6 Free Download
Open Source Physics @ Singapore (Easy JavaScript Simulation and Tracker) and TagUI (AI-Singapore): How to Sign Jar Files for Web Deployment of Java Applets, an Easy Java Simulation applet example.