How do I download Java 3D and Java Advanced Imaging for High Sierra (10.13.2)?

Both are installed with the Mac OS. But, there is an update available if you wish to install it.

Java 3D and Java Advanced Imaging Update: Information and Download

From other information I found on the subject, you still have to install Oracle's Java runtime in order to utilize either.

Download Free Java Software

There are basic structures for Java already installed by the OS, but you can't do anything with them until you install the runtime modules. Either Apple's Java 6, or Oracle's Java 8.

Most are in hidden folders. You can locate them by using EasyFind and doing a search for "java" (without the quotes).

FWIW and I'm sure you'll not agree, get it working in Windows if that is what others are using then take the time to figure out how to do it with the Mac side. When I was in University I didn't have time to get sidetracked trying to get already working tools working on another system. I'm sure the professor is going forward with his class rather than spending time trying to get a tool working on a system that no one is using the tool on.

Is anyone else in the course using a MacBook Pro and High Sierra? If so you might try asking them how they got it working.

What version of High Sierra are you running, is it 10.13, High Sierra has moved on to 10.13.2

you can download the Combo here, macOS High Sierra 10.13.2 Combo Update

Check which version of High Sierra you are running in About This Mac.

So are Java 3D and Advanced Imaging included or are they a separate download?

According to what I've been able to find on the subject.

I'm not installing Java to find out.

Then how do you expect to get your assignments done? If you install Oracle's Java 8, you only have to delete one file to remove it. Well, that and an alias in the PreferencePanes folder.

Well, that was a vague answer by me when it can apply to either part of your question. Let's try it again.

So are Java 3D and Advanced Imaging included or are they a separate download?

According to what I've found on the subject, 3D and Advanced Imaging for Java is already installed by the OS. Or, more specifically, the underlying structure that can't do anything without the runtime installed.

One of the runtime versions of Java are the second link I provided in my initial response. That's Java 8, directly from Oracle.

Apple's latest implementation of Java 6 is here:

Download Java for OS X 2017-001

Apple’s “latest” is a deprecated Java, so I’m not sure it will work but I’m willing to try it.

For your classwork, it may not. About the only reason for its existence is to run older Java apps that reside directly on your Mac. The OS will not allow it to attach to a browser.

The latest release of Java 6 is also very easy to remove (the previous was almost impossible to remove manually). You simply go to the /Library/Java/JavaVirtualMachines/ folder and toss the subfolder 1.6.0jdk in the trash. That's it. Gone.

A .jar file is a completed Java app waiting to be launched. Which it can do now that you have Java installed. It's not the easiet thing to do. Not hard, but not as simple as double clicking the file.

One user on these forums found a couple of ways to run them. Both solutions he used are in this topic:

Running a java jar program from OS x

I'm afraid I have no other suggestions. I only know Java must be installed to run a .jar file; which you've done. Did the two ways to run a .jar file in the linked discussion help? If not, I couldn't say how to make it work.