You will see an application called IntelliJ IDEA on the department machines.
To download IntelliJ on your own machine, you will first want to
go here to apply for the free version
for students. The java development environment is IntelliJ IDEA.
The recommended install from JetBrains is downloading the
JetBrains Toolbox
and selecting IntelliJ once it is installed. That will keep it updated on your
computer and easy to manage other IDEAs from them.