(Java) How to Keep Track of Numbers Entered by User for Determining Min and Max

I have a homework assignment that is asking me to use an input dialog to ask the end user to enter a number, parse that String to an int, and then use a confirm dialog to ask if the user wants to enter another number. If they click yes, the program loops, and once they hit no, it takes all of the entered numbers and determines the min and max. How do I keep track of all the entered numbers without declaring multiple variables to hold them (since the user can technically enter an infinite amount of numbers)?

I'm very new to programming. I've been scouring my textbook, and I've browsed Stack Overflow to find my specific problem and haven't found anything, at least in Java.

    {
        int yes = JOptionPane.YES_OPTION;

        do
        {
            String numberstring = JOptionPane.showInputDialog("Enter a "
                    + "number: ");
            int number = Integer.parseInt(numberstring);

            yes = JOptionPane.showConfirmDialog(null, "Do you want to enter"
                    + " another number?", "MinMax", JOptionPane.YES_OPTION);
        }
        while (yes == JOptionPane.YES_OPTION);

        JOptionPane.showMessageDialog(null, "The min is " + min + " and the"
                + " max is " + max);
    }

I'm not exactly receiving any errors, I just have no idea how to hold a possibly infinite amount of entries from the user since the program loops until the user clicks "no".

You can use an ArrayList and add numbers to it. Once you have collected all the numbers, you can initialize two variables, say min and max with the first number in the list. Imagine you had just one number. In that case, it would also be the minimum and the maximum. This explains why to initialize min and max with the first number in the list. Now, compare the values of min and max with each number in the list, and update their values accordingly. Note: There are APIs available to find the minimum and the maximum numbers in a list, but since you are a beginner, I suggest you stick to this method for now.

{
    int yes = JOptionPane.YES_OPTION;
    List<Integer> list=new ArrayList<Integer>();

    do
    {
        String numberstring = JOptionPane.showInputDialog("Enter a "
                + "number: ");
        int number = Integer.parseInt(numberstring);

        list.add(number);

        yes = JOptionPane.showConfirmDialog(null, "Do you want to enter"
                + " another number?", "MinMax", JOptionPane.YES_OPTION);
    }
    while (yes == JOptionPane.YES_OPTION);

    int min = list.get(0), max = list.get(0);
    for (int i = 1; i < list.size(); i++) {
        if (min > list.get(i))
            min = list.get(i);
        if (max < list.get(i))
            max = list.get(i);
    }

    JOptionPane.showMessageDialog(null, "The min is " + min + " and the"
            + " max is " + max);
}