[brianhks]

I would use a linked list (java.util.LinkedList) to put the lines in.

Code:

LinkedList lineList = new LinkedList();
BufferedReader br = new BufferedReader(new FileReader("FileName"));
String line;
while ((line = br.readLine()) != null)
{
lineList.add(line);
}
br.close();

On output I would use a PrintWriter and an Iterator over the LinkedList.