Question

I have to write an application where I retrieve a lotto numbers that I stored as strings in a database and compare them with the winning lotto number that was generated by the application itself.
I am a bit stuck with this one.

I started of with retrieving the 6 lotto numbers from the database and adding it to an array list.

ArrayList<String> listTwo = new ArrayList<String>();


    ResultSet set = state.executeQuery("SELECT * FROM NumbersClients");
    while(set.next())
    {
        String numbers = set.getString(1);
                    listTwo.add(numbers);
    }

The numbers I generated randomly I saved in an ArrayList and then converted to an Integer array.

Integer[]entries = lottoDraw.toArray(new Integer[lottoDraw.size()]);

Any pointers perhaps as to how I can retrieve each individual lottodraw from ‘listTwo’ and compare them to the winning number(‘entries’) and thus estblish 3,4,5 matches etc.

Thank you

Answer 1

Why not store the numbers individually in the database. Then generate the winning numbers and query the database. E.g.

SELECT * FROM NumbersClients
WHERE no1 = ? AND no2 = ? AND no3 = ?
etc.

This way you avoid retrieving large amounts of irrelevant data