Processing on jetson nano

I am trying to use processing programming language on jetson nano which use ubuntu 18 TLS.I download the file from http://download.processing.org/processing-3.5.3-linux-armv6hf.tgz when I try to start its give me

./processing: java: not found

How can ı make this work?

You may need to install java first.

Which languages can you use? Just Java or also Python?