Please Help With A Loop Using Vectors?

Question

I am developing a swing application and this loop has me completly stumped I have not worked with vectors alot, nut I have never seen this happen in a loop before:
I am just going to post the loop because that is where this problem is happening.
What I want to do is loop through CAT X amount of times and
have an inner loop for SUBCAT X amount of times.
fs is a formattedString class I have and eventually this text is appended to a JTextArea.
Here is the Loop:
Vector CAT = new Vector();
Vector SUBCAT = new Vector();
CAT = getCategories(Department);
for (int i=0; i<CAT.size(); i++){
String Category = CAT.elementAt(i).toString();
fs.append("\nCategory: ",11);
fs.append(Category,65);
SUBCAT = getSubCategories(Category);
}//End CATEGORY
The part where I am completely stumped is, if I comment out the SUBCAT= part then the Text displays fine. If I dont it will just display the first string in the CAT Vector I have done a try and catch to see if there is an exception being thrown but there is none. The getSubCategories() method works fine b/c it is working at other parts of my program. (It Returns a Vector BTW). So commenting it out should really make no difference.
Can anyone help me with this????
Thanks in advance

Answer 1

I will post what my output is in each scenario and maybe you can better understand what I am explaining:
SCENARIO 1::::::::::::::::::::::::::::
for (int i=0; i<CAT.size(); i++){
fs.append("\nCategory: ",11);
fs.append(CAT.elementAt(i).toString(),65);
}//End CATEGORY
Category: A Collars
Category: Access Door
Category: Aluminum
Category: Anchors Drop In
Category: Bits
Category: Blades
Category: Bolts, Nuts, Pins and Rivets
Category: Bolts, Nuts, Pins, and Rivets
Category: Canvas Connection
Category: Caps
Category: Caulking
Category: Copper
Category: Duct Mate
Category: Ells
Category: Flat Bar
Category: Flex Duct
Category: Galvanized
Category: Grills
Category: Insulation
Category: Iron
Category: Miscellaneous
Category: Pipe
Category: Reducers
Category: Return Air Panels
Category: Rings
Category: Rod
Category: Slide Gates
Category: Spin Ins
Category: Stainless Steel
Category: Stick On With Damper
Category: Tape
Category: TDC
Category: Tees
Scenario 2:::::::::::::::::::::::::::::::::
Category: A Collars
for (int i=0; i<CAT.size(); i++){
fs.append("\nCategory: ",11);
fs.append(CAT.elementAt(i).toString(),65);
SUBCAT = getSubCategories(CAT.elementAt(i).toString());
}//End CATEGORY
Now do you see:
The SUBCAT = getSubCategories(CAT.elementAt(i).toString()); should not be affecting the loop. It should just be assigning a new Vector to SUBCAT. I know that it is missing the inner loop in this example, but this is how I found out the loops where not working right.