Customer writes: I upgraded my OS recently and am now getting this attached popup. It asks me to download Java for Mac OS X here, which I then do. I restarted my computer [but] the popup continues to appear throughout the day. Is there anything you can suggest I do to stop this message (To view this web content, you need to install the Java Runtime Environment) from appearing?
It sounds like you upgraded your Mac to Yosemite (OS X 10.10). Others have posted on the Apple Support Communities website that they have been frustrated by seeing this same Java error message. The fix is to download a different Java installer that is available from the Apple website. The link is provided below.