Do you want to write a part of it yourself or do you want us to prepare you a complete solution? I provided you with a link to Java's zipping tutorial. If you took the effort to read it, you'll know there is an example zip.java.
You can put the initialisation in your main, take what's in the for loop, put it into a function. I assume you can write a program that takes 2 command line parameters, and pass those params to your zip function and you've got it... That's how far I'll go for your solution!