When you move to Windows 10, you will leave Java in the browser behind as you move to the Edge browser, which strictly prohibits plugins. Now, here's something (not very) secret: If you absolutely must keep your browser-based Java applications, you can. Windows 10 also comes with Internet Explorer 11, and it's quite happy to allow plugins such as Java. That means you'll still have the plug-in-based security concerns, but you already
Java Has Left The Browser

Java's time as a programming language for browser-based applications is coming to an end. When you move to Windows 10, you'll leave Java in the browser behind as you shift to the Edge browser, which flatly prohibits plug-ins.
Now, here's something (not very) secret: If you absolutely must keep your browser-based Java applications, you can. Windows 10 also comes with Internet Explorer 11, and it's quite happy to allow plug-ins such as Java. That means you'll still have the plug-in based security concerns, but you already knew that.
For the future, though, you should plan on moving your Java applications to the desktop. They'll really be quite happy there, and your users will learn to cope with life lived outside the browser window.

(Image: geralt via Pixabay)