Unsure what data structure will work best??

Question

okay heres the scenario
i have 4 strings per element and i need to store these within a data structure, the number of elements is not to be fixed
is it possible to store an array within an arraylist or vector?
when i tried to implement the vector it seemed to work fine until i tried to display the element, heres my code
Vector vectorDetails = new Vector();
String[4] arrayDetails = new String(4);
details[0] = nameText.getText();
details[1] = nameText.getText();
details[2] = nameText.getText();
details[3] = nameText.getText();
String[] s1 = (String)details.lastElement();
String[] s2 = (String)details.firstElement();
whenever i print s1 or s2 i get the same information, regardless of the amount of elements i have
sorry i couldn't post more of the code, but its on the large size, but if anyone can help i would be much appreciated

Answer 1

okay, now i am really confused, how did i get from a vector to a hashtable??
to be honest i dont think that structure will work with my GUI
the way it stands i have five buttons across the top, standard buttons, i.e. new, add, search, edit, delete
at the bottom i have four buttons, firstElement, previousElement, nextElement, and lastElement
in the center of the screen i have my textfields were i enter the details and also view each individual persons details, as such i will need access to each individual string
at present i have two classes, EmailContactDatabase.java & Person.java so i will need to pass the persons details back and forth
any further help would be much appreciated
note this is a university assessment, so i am not looking for specific code, just some pointers to get me in the right direction
note note the structure as i pointed out in an earlier post does NOT have to be dynamic, i can set the maximum number of elements.