Basic help with ArrayLists

Question

I'm doing a project in Java where I have to put numbers in a list, then shuffle them. Then I have to access those numbers and create a Bingo card. I've got everything down except for the accessing the numbers part. How exactly do I access integers from an array list? I read online that I should cast the elements in the ArrayList to an int, but I try that and get an incovertible types error message when I try to compile. Here is my code so far:
import java.util.ArrayList;
import java.util.Random;
import java.util.Collections;
* Numbers class -- will generate a list of numbers, shuffle them, and then have a method to return them to the Bingo card.
public class Numbers
    private ArrayList bingoB;
    int cnt;
    String testString;
    public Numbers()
       bingoB = new ArrayList();
       resetNumbers();
    public int getNumberB()
         int test = (int) bingoB.get(0);
         testString = "b-" + test;
         return testString;
    public void resetNumbers()
        for(cnt = 1; cnt <= 15; cnt++)
        bingoB.add(new Integer(cnt));
        Collections.shuffle(bingoB);I really need help with the casting/accessing integer part, but any other tips about what I've got going on in the int getNumberB method would be helpful as well. Thanks in advance.

Answer 1

You don't cast to 'int', you cast to 'Integer'. You put 'Integer' in, so you take 'Integer' out.
To get the 'int' value from an 'Integer', use the "intValue()" method in the Integer class.
testString should be local to getNumberB--it should not be an instance variable. Is getNumberB supposed to return an int or a String? If you want the String, you need:
public String getNumberB() { ...}