I want to make a java-based GUI tool that checks for the latest version of java available online,and compares it to the version currently installed
I already know how to check for the version currently installed on the machine
I don’t know about the part where you check for the version available online
This web based Java Tester does what you want to do.
The author of the Java Tester keeps track of the latest version manually. I think you would have to do the same.