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Using Libraries In Netbeans Java With Ant

This is my first StackOverflow question, and I'm also a Grade 12 student, so apologies if it is a stupid one - feel free to let me know if it is, however, after numerous hours searching the internet, I can't find an answer to this.
this is not homework help.
Background
I am currently writing a program in Netbeans that will deal with large COVID datasets, and I'm looking to use some external libraries to make operations easier. The ones I've looked at are
https://github.com/jtablesaw/tablesaw and https://github.com/nRo/DataFrame.
However, I have only ever used "Java with Ant", and both of these GitHub's only mention using the library through Maven dependencies in the pom.xml file. I have never used Maven, and I am very unfamiliar with Build Tools in general. As when I was introduced to Java, my teacher instructed me to use Java with Ant. That being the case, any time I have used an external library before I have simply added the .jar files into my library folder and used
import foo.bar; or import foo.*; to use the libraries.
My question
Is there a way for me to use either of these libraries without switching build tools? For example, download the source and make the .jar's in a way that isn't overly tedious, so that I can use the libraries the same way I am used to? Or, perhaps something I'm missing that allows me to download them in that format? If not, seeing as almost every Github library I find instructs me to use it through Maven dependency, should I stop using Java with Ant altogether and start learning how to write programs using Maven?
Any insight is greatly appreciated. If this has already been answered, feel free to link the answer and sorry for cluttering up the forum. Thanks.

From one of the Maven websites you can download the libraries and use them as normal. First find the artifact page, for example using mvnrepository.com as shown below, or you could use the https://search.maven.org/:
Find the relevant page by searching for the artifact, then once there you can choose the version:
Then click on "View all" to see the artifact jar files:
Then lastly right-click the file you need and choose save:

Is there a way to use external libraries in IntelliJ without downloading their .jars?

I am trying to write a standalone Java application in IntelliJ using edu.stanford.nlp.trees.GrammaticalStructure. Therefore, I have imported the module:
import edu.stanford.nlp.trees.GrammaticalStructure;
Currently, Intellij doesn't recognize this and many others of the imported external libraries (cannot resolve the symbols) and is also not able to automatically download/import them.
Is there a way to use the GrammaticalStructure class without having to download the entire Stanford CoreNLP .jar and adding it to the project as a library? This question applies to other dependencies as well, since I want to use other external libraries but avoid including their .jar files as much as possible (to minimize the size of the final application, given that it will be standalone). Unfortunately, all the solutions I have found proposed exactly that.
Apologies if I have overlooked some basic setting or setup steps, it has been a while since I have worked with Java.
Any help is greatly appreciated.

If you want to use it means you want to execute the code in them. How is the runtime supposed to execute code that is does not have? How is the compiler supposed to know how the code is defined (e.g. what the classes look like)? This is simply impossible. If you want to use the code you have to provide it to the compiler as well as the runtime.
If you just dont want to include all of that code into your application, you need either access to the sources and just pick the class you need or you need some kind of JAR minimizer as #CrazyCoder suggested.

Import Neo4J API in Netbeans

For a project I am building a Java GUI from which queries can be sent to Neo4j, to make it easier to do particular analyses. To get this all working, I have downloaded a .jar folder containing all relevant classes (neo4j-javadocs-2.1.7-javadoc.jar). I have loaded the library through the project->properties->libraries->Add JAR, but I can't seem to import the classes I want to use in my GUI (neither automatically nor manually).
I am dabbling in Java, so it is probably a basic oversight that I am making, but with the help from tutorials online and trying different commands (like entering the path of the .jar file) I can't get it working. One of these tutorials is specific on the Neo4j library, so I am very confused. That tutorial is written for Eclipse, instead of NetBeans which I am working with, but as far as my knowledge goes that shouldn't matter for the commands
I don't have enough reputation to post direct images, but this link contains a screenshot. If more information is required, let me know. http://i.stack.imgur.com/lUytK.png
Additionally, when I normally add a class that is not imported, there is an automatic function to import the class. This option is missing for my specific class, so maybe I added the library in an incorrect way?
http://i.stack.imgur.com/QeDX4.png
Edit: Issue resolved thanks to a colleague that came in. Apparently I loaded the Javadoc where I should have loaded to individual classes from the lib directory.

It really should work.
Try to save all changes. NetBeans reparses the classes when you save them.
Try to build your project manually from command line using Ant build script

Use Maven, Ivy or Gradle for Dependency Management then you can depend on the Neo4j artifacts.
For sending queries to the server you actually don't need Neo4j artifacts.
You can also use the JDBC driver, see http://neo4j.com/developer/java

Any website with a list of thirdparty java libraries?

I'm wondering if there is a website with like a list of java libraries/jars where you can browse around and see if theres something you could use. like when you make your own program which then contains lots of useful stuff.
Sort of like a website where people share their code, for public use.

SourceForge
Freecode (Freshmeat)
Google Code
github
Java.net

http://mvnrepository.com - if you know jar name or package name. it will provide you available versions and pom/ivy/gradle coordinates for copy/paste.
http://findjar.com/ - helps you to find jar containing this f*%^ing class nobody knows about (and then you can search mvnrepository to look if it is available for maven build - if not, the best is just ignore this library as this is probably of low quality or not yet released to public properly)

How to download the edu.mit.sketch.geom libraries

On the Java API, I see references to packages named "edu.mit.sketch.geom." I'm looking for some advanced geometry libraries (mainly collision interpretation), and after a brief overview of the methods contained the package is looking really good, and I'd like to try it out.
However, I can't find any downloads. It doesn't appear to be in the standard Java library, and I'd like to package it as a jar in my project, but a few Google searches return references to the package but no download.
Does anyone know where I can get it?

I Google'd around a bit and the only place I could find what looks like the toolkit you want was on the handouts page of the 6.893 course at MIT: direct link; there doesn't seem to be a project site, at least, not a public one.