To check which version of Java you have on your Windows computer, you'll need to open the Command Prompt.
There's a specific way you should uninstall programs on Windows 10, and it involves going into your Apps and features menu.
If Java is not working in Windows 11/10, these solutions may help you troubleshoot the issue. Although, due to the lack of NPAPI support, Java applets stopped working in Microsoft Edge, Google Chrome, ...