Simple question with arrays

Question

Im a couple days new in java, Ive been searching for an answer for hours and havent found a solution.
This is the mistake it shows (when trying to use any element of the array):
array required, but java.util.ArrayList <java.lang.String> found
The array is:
public static ArrayList<String> numList = new ArrayList<String>();
Im filling it this way: (so that it contains each word of a file in separate)
BufferedReader br = new BufferedReader(new FileReader("Archivo.txt"));
try
while(true)
String aLine = br.readLine();
if(aLine == null) throw new EOFException("Le?do todo el archivo.");
if(!aLine.equals(""))
StringTokenizer st = new StringTokenizer(aLine);
while(st.hasMoreTokens())
numList.add(st.nextToken());
}catch(EOFException e)
The problem comes when I try to use the elements of the array (in specific when trying to convert each element of the array to int, so that i can do math operations with them).
for example:
for (a=0; w>a; a++)
int x = Integer.parseInt(numList[a])
Can anyone help me with this? (where is the mistake and how to convert from string array elements to int)
Thank you // Muchas Gracias

Answer 1

The trouble is that you're confusing ArrayLists with arrays. They're not the same thing.
Currently you're making an ArrayList. If you want an array of String, do this:
String[] myArray = new String[50];
int i = 0;
while(st.hasMoreTokens()) {
  myArray[i] = st.nextToken();
  i++;
}Or perhaps better yet:
String[] numListArray = numList.toArray(new String[0]);But you really don't need an array for what you're doing. Use an Iterator.
Iterator<String> strings = numList.iterator();
while(strings.hasNext()) {
  int x = Integer.parseInt(strings.next());
}You get the idea. Read the Collections tutorial about iterators. Read the language spec about arrays. Also look at the java.util.Arrays class.