If Java is not recognized as internal or external command, you need to make sure that the installation is not problematic and its path is recognized as system variables.

Want to know how to set up a Minecraft server with your friends? Here's all you need to know with step-by-step instructions.

Learn how to use the Command pattern to encapsulate requests as objects that you can execute alone or in sequence in your Java programs.

Here is a Java install tutorial if that prerequisite is yet to be met. If you are unsure as to whether the JDK is installed — or what version it is — simply open up a command prompt and type java ...