Question

I retrieved individual String values from a database and converted it into a String array by using the String method split().

ResultSet set = state.executeQuery("SELECT * FROM numberLotto");
while(set.next())
{
    num1 = set.getString(1);                   
    num2 = set.getString(2);
    num3 = set.getString(3);
    num4 = set.getString(4);
    num5 = set.getString(5);
    num6 = set.getString(6);
    num7 = set.getString(7);
    totalLotto += num1 + " " + num2 + " " + num3 + " " +  num4 + " " +
        num5 + " " +  num6 + " " +  num7 + " " + "/";
}
String[]listOfNumbers = totalLotto.split("/");

The resulting output is as follow

3 18 27 38 41 45 47     
4 7 11 15 22 33 42
2 9 15 23 24 39 44 
4 11 16 17 35 39 48

etc

How could I add the above numbers into an array of an array so that I can loop through each individual number?(and subsequently check if they are contained in a list of winning numbers?)

Kind regards

Answer 1

Why are you using strings at all? This seems to be numbers so integers would be a better match:

List<int[]> listOfNumbers = new ArrayList<int[]>();
while(set.next()) {
     int[] numbers = new int[7];
     for (int i = 0; i < numbers.length; i++) {
         numbers[i] = set.getInt(i + 1);
     }
     listOfNumbers.add(numbers);
}

You obviously could also use Integer[] if necessary.