O.T Help sought from Java Programmers

[LDiCesare]

Your student class is fine.

The get/set usefulness will appear when you change the implementation. For instance, gender can only be 'male' or'female'. So when someone wants to set or change the gender of a student, you can check in the setGender method that he's putting 'male' or 'female', and refuse to do anything, throw an error or react however you like if they try to say setGender( "42" ). IF you leave the data public, you can have all kinds of spurious values in your fields.

I recommend using a Vector for the list.

Note the assignment says array. I'd go with a Vector (or List) too, because using a java array would be totally stupid in this context. I suppose "array" was ment as a general term and not the [] thing.

[Psycho]

Using the List or Vector beats the point of the existence of the Enrollment class in the first place. I am pretty sure the intent was to make him create his own Vector class (with the name Enrollment). It's really not a very good project.

For gender the best way is to create an enum if Java supports those. Or a couple of constants and make the field int.

[LDiCesare]

Of course using a string for gender is not great. A boolean would do the job, or a class with two fixed instances and a private constructor rather than an enum. But then IRL you would store that info in a database anyway.
Hand-writing an array with proper memory management is just a pain and probably beyond the OP's skills right now, so he's better off using a List to begin with in my opinion. It's also a rather useless exercise in java. It's great in C, but in java it's just silly as you could copy-paste the Vecotr code if you wanted to anyway.

[Natpy]

Here

[LDiCesare]

My java may be rusty, but... what is the Enrolment enrolment line in the main for?