JohntSmitht23
JamestJonest21

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

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

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);

List<List<String>> array = new ArrayList<List<String>>();
while ((str = br.readLine()) != null)   {
    array.add(Arrays.asList(str.split("t")));
}

final int SIZE = ...; //some value that would be the max size of the array of arrays
String array[][] = new String[SIZE][];