Java environment could not be found Minecraft?

Can someone tell me how to get this problem under control?

By installing java…

You have to install a Java environment, as well as there's. Also, at the bottom, "Exists: false," indicating that you definitely have none installed.

And how do you install the Java environment, the Java I've already downloaded. Do not come anyhow.

Minecraft comes for some time with integrated Java environment.

Since the folder (which is mentioned above) seems to have been deleted, you have to "add" it again.

That Either you reinstall Minecraft OR install Java 1.8.0_51 in the named folder.

I recommend you way number 1.

But think of a backup of your worlds / mods / screenshots / resource packs etc… Should you have installed some.

I bought it new only today, so I do not have any worlds, mods, etc. Above. If I reinstall the game now, I have to pay it again or in which folder is Java 1.8.0_51 to install?

Sorry in advance, do not know me so well in this area.