No java message - installing on raspberry pi

[PhilE]

Hi
I'm setting up minim server on raspberry pi using RPi 3B+ with raspbian buster lite (dowloaded today). Assumed java already part of that but:

command java -version gets response -bash: java: command not found54:
and
command minimserver/bin/startc response is java: not found

Can anyone help me with the installation?

Thanks in advance

Philip