Importing a custom library

[chrondog]

I put my program in

C:\Users\Documents\Java Programs\MyProgram.java

I am using HTMLUnit and put the jar in the same folder

C:\Users\Documents\Java Programs\htmlunit.jar

I want my program to use the htmlunit libraries without having to put it inside the jar. How do I do this?
The only thing that felt like progress so far was doing this in the command prompt

java -cp "C:\Users\Documents\Java Programs\htmlunit.jar" com.gargoylesoftware.htmlunit.WebClient

The WebClient part is a class in the library. The only reason I have it there is because it's the only thing that gave me a different result. I could replace it with another class in the library I'm sure and get the same error.

But then it tells me I need a main method in this folder in order to set the class path. That doesn't make sense to me because why would a library have a main method?
That's what my program is for. Isn't the classpath a location that the compiler will check for libraries? I know some of you may say you can just do

import htmlunit.com.gargoylesoftware.htmlunit.*;

But when I use the WebClient class, it says

C:\Users\Documents\Java Programs\Testing.java:14: error: cannot access WebClient
		WebClient webClient = new WebClient();
		^
  bad class file: .\htmlunit\com\gargoylesoftware\htmlunit\WebClient.class
    class file contains wrong class: com.gargoylesoftware.htmlunit.WebClient
    Please remove or make sure it appears in the correct subdirectory of the classpath.
1 error

Tool completed with exit code 1

Can someone please give me a guide on this?

[chrondog]

Was my post hard to understand? I'll restate what I asked in different words.

I have a package I downloaded named htmlunit.jar.

How can I import the classes in htmlunit.jar just like I can do "import java.awt.*;"?

Just like I can link the standard SDK to any of my programs, I want to link htmlunit so I can use it.

EDIT: I got it working with the NetBeans IDE. But still, I'd like to know how it is done manually.

[Fubarable]

You mention you've put your java file somewhere, but where do you have your *class* files? Have you compiled your project yet into class files?

[chrondog]

I was using TextPad which doesn't have "projects"; just a java file and the compiled class file. So yea I do have it compiled.

[Tolls]

Just import it in your class.

When you compile your class you need to include the jar file that has those classes in your classpath (-cp), and also when you run your class file.
Thos are its dependencies...the 3rd party things your code needs in order to run.