Java Error when clicking "Play"

So, this has happened before, but I guess I fixed it. But I don't think this is a proper solution.

What is basically happened is that when I click "Play", on the Minecraft Launcher, it loads up (the little blue bar) and then the launcher disappears, as usual, but then a Error window shows up (screenshot of it will be attached).

What causes this is me not having the Java 7 Update 51 installed. Because every time I uninstall it and then try to play minecraft, that error pops up. So I basically have to have 2 different versions of Java installed: the Update 51 and then the latest update (right now, Update 65). And I don't think this is supposed to happen or am I really supposed to have the 2 Java updates installed?