Minecraft (Java Edition) See it at Minecraft.net See it at Amazon Minecraft for Windows 10 See it at Microsoft The original Minecraft for PC and Mac is often referred to as "Java Edition" online ...

The Java JDK (Java Development Kit) is a software development environment that creates Java applications.

If you missed your chance the first time around, Mojang has allowed more players to redeem their free copy of Minecraft on Windows 10 if they already own the Java Edition.