I fear I haven't fully understood your message, after two readings. What is the "java zip file"? An exported jar?
You want the data files to be included in this jar file?

Like PhiLho, I don't quite understand your question...

Do you need to add external files to the data folder (go to Sketch > Add File)?
Do you need to create other PDE files (create new tabs)?
Do you need to add a Java file (go to Sketch > Show Sketch Folder, move any Java files to that folder)?

Also, any files included in the sketch folder will automatically be included upon export...

Sorry i wasn't very clear i am wanting to save files of some sort into the exported .jar file that can be accessed in the code.

In other words, you want to add code to your program.
If the code is fixed (it isn't changeable), then just go ahead and add it to your project.
You can use multiple tabs to better organize your code...

If the code is variable, on the other hand, and it is going to be stored somewhere and you have to retrieve it from  within the program, then you need to create a method of storing the data (probably a text file that contains the values) and a way of reading the data and using it in your program.

Processing (or Java) isn't like Python or other interpreted languages where you can just add snippets of code to your program on the fly; however, you can read and interpret external data.

How do i add multiple tabs? are they exported to different locations inside the .jar file or the same single file?

Go to the right-facing arrow at the far right of your screen, towards the top...
Click on it and select "Add tab". There are other tab controls there as well...

You can choose whether or not to use multiple .jar files upon export. By default, it will create only one.

Will using multiple jar files upon export not load the seperate .jar files until a command requests them? or will they just load them all as soon as the application is run? Also is the syntax the same if you have multiple tabs?

They are all loaded at once... they're all part of the same application.
Again, this is Java, not Python or some similar language...

Yes, the syntax is the same for multiple tabs...
Also; any code in different tabs is (eventually) assimilated, that means don't duplicate anything; draw() or any variables, for instance.

Is there any way to make database files for level storage to access later after the application is run not during its loading time? Because if the game ends up having 100+ levels each with a decent amount of data storage loading it all at once is annoying. Also how do i move the tabs around to organize them?

Yes, you can use any form of database storage that you wish as long as you can parse it.
A particularly well documented way of using XML is by using Processing's XMLElement...
Also, you can find a way of parsing any form of text file...
Just put it in your data sketch's data folder, or perhaps store them at an online repository...

Most applications load a lot of files at the beginning of the program anyway...
If you need to, you can look into threading.

You could alternatively try to load all of the data spontaneously when it is requested...
I'll leave figuring that out up to you.

For tabs, there is no way to really organize them...
They are automatically displayed in alphabetic order.
If you want to, you can switch to using an external editor...

Ok thank you. And i assume when i want to compile it i just save them all in the sketch folder and then compile it right?

The easiest way to add files is to go to Sketch > Add File... it does everything automatically.
To do it manually, create a folder called "data" inside the sketch folder (if it doesn't already exist) and put all of the external files there.

To find the sketch folder, you can go to Sketch > Show Sketch Folder...
Your fonts and other file will be there, as well...

Ok thank you so much!