Combining two ArrayLists of Integers into a new ArrayList.

Question

Basicly I have two arrayLists that have a list of numbers and I want to add them both into one new arrayList in the same index. Example
aList1 = [ 4 , 5 , 10 , 33 ]
aList2 = [ 1 , 3 , 19 ]
combinedList = aList1 + aList2
print out combinedList = [4,5,10,33,1,3,9]
That's what I want out of it but the only way I can do this is if I write
combinedList.add[aList1]
combinedList.add[aList2]
but it would come out like [ 4 , 5 , 10 , 33 ] [ 1 , 3 , 19 ]. Two seperate indexs holding a list of Integers. Where I need it to be [4 , 5 , 10 , 33 , 1 , 3 , 9]
Which is incorrect cause they are in seperate indexs. I need to place both of them into the same index starting with all the numbers for aList1 and then aList2.
I could just go through each aList1 index and placed each one into a new arrayList and then do that with aList2 but I'm trying to make this a little more efficient than that. I tried using addAll but it seems to add each arrayLists as an object and that just comes out like 2. Here's some of the code from by program.
Collections.sort(alist1);
Collections.sort(alist2);
aNewList.add(alist1);
aNewList.add(alist2);   
return aNewList;Like I said I could do it the long way but I'm trying to keep the complexity to a minimum. Any help would be very much appreciated. Thanks :)
Edited by: DavidMilot on Oct 18, 2008 6:08 PM

Answer 1

DavidMilot wrote:
Not to be rude I just cannot copy and paste all my code into the forum out of fear of plagerism.I didn't mean for you to post all of your code. Just a small program that demonstrates the problem. This program would have 3 arraylists on it, 2 filled, one empty that would receive the other two. You combine them, print out the third and that's it.
I could rename all my variables and method names but I unfortunately don't have time to do all that because I have 3 midterms coming in 3-4 days. This doesn't seem to be an easy fix just by giving out minimal code (which the names have been altered) but I still appreciate the effort. For now I tend to leave the code the way it is havingThe onus of effort here must be yours.
newList.add(aList1)
newList.add(aList2)
It's not perfect but that's as close as I can get for now. Plus this assignment is due monday hehe. Feel free to continue giving me ideas to try out I plan to ask my TA monday before handing it in. Thanks again.I mainly wanted to see is if you are using addAll two add both aList1 and aList2. For some unknown reason in the code you posted before you didn't. Again, lord knows why.