There are a variety of other interesting Java command-line interface tools packaged within the bin directory of JDK, and it is in the best interest of every Java developer to investigate them and ...

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.

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 ...