Confusion Algorithm... Help

Question

Hi.. i have a complicated doublylinkedlist that i am stuck at a position.. See, the list is distributed into boxes... each box is of certain size.. once the elements added to first box are filled, it creates the next box... for e.g.
A-b-c-d-E-f-g-h-i-J-k-l-m
The capital letters are box headers. Each box is of size 4.
the value variable tells which node.
Now, if i want to get to E box header, how can i do it.. i am using a while loop,
but the loop doesn't stop at the boxheader that has the element, it goes to the end boxheader.. here's the code...
(i have to get the value number on the linked list. First by getting to that box and then getting to that value node).
/** nextBox goes from one boxheader to next. */
BNode node = front;
BNode node2 = null;
int i = 0;
while (i < value {
node = node.nextBox;
node2 = node;
for (int x = i; x < index; x++) {
node2 = node2.next;
System.out.println(node2.getValue());Now suppose if the value was 5. The node2 should return "f". but instead the nextBox goes all the way to the end... PLZ help..
i have to get to the value in the list and return the node. First i have to jump thru boxes and then go thru nodes... HELP plz...

Answer 1

OK finally getting somewhere.
The while loop I posted earlier should find the target node 'f'. If not it's just a matter of tweaking the condition.
Next you had a for loop that kept advancing the node by looking at the next node. But the header is before the target node not after. You mentioned that it is a double linked list. Then you should have a way of looking at the previous node. So you would need another loop that continues moving to the previous node until you find the header.