Question

Whilst I can get it to work on a 1 dimension array (String array[] = str.split(blah)), I have trouble on 2D arrays. I’m using a loop that goes through each row of the 2D array and assigns it whatever str.split(\t) has.

For example:

John\tSmith\t23
James\tJones\t21

My 2D array will look like this: {{John, Smith, 23}, {James, Jones, 21}}
I’ve only begun Java so I’m not too sure about some of the syntax for 2D arrays.

EDIT: Some code as requested

String str;
int row = 0;
String array[][];
while ((str = br.readLine()) != null)   {
    array[row] = str.split("\t");
    System.out.println(array[row][0]);
    row++;
}

Answer 1

You need to initialize your array as follows:

int rowCount = ...;
String array[][] = new String[rowCount][];

or in case you don’t know the number of rows, you may use ArrayList instead:

List<String[]> list = new ArrayList<String[]>();
String str;
while((str = br.readLine()) != null)
{
    String[] array = str.split("\t");
    list.add(array);
}
String[][] array2D = new String[list.size()][];
list.toArray(array2D);