I need your help!!! Please?

hi guys this is the code so far but i need the upperLimit to be input from the user please help me?

Code:

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public class Prime {
   
    private static int upperLimit = 1000;
    private static boolean[] flags;

    public Prime() {
    }

    public static void main(String[] args) {
        initialize(args);
        findPrimes();
        displayPrimes();
    }
   
    private static void initialize(String[] args) {
        if (args.length > 0) {
            upperLimit = Integer.parseInt(args[0]);
        }
        flags = new boolean[upperLimit + 1];
        for (int position = 0; position <= upperLimit; position++) {
            flags[position] = false;
        }
    }

    private static void findPrimes() {
        for (int position = 2; position <= Math.sqrt(upperLimit); position++) {
            if (!flags[position]) {
                int multiple = position * 2;
                while (multiple <= upperLimit) {
                    flags[multiple] = true;
                    multiple += position;
                }               
            }
        }
    }
   
    private static void displayPrimes() {
        for (int position = 2; position <= upperLimit; position++) {
            if (!flags[position]) {
                System.out.print(position + ", ");
            }
        }   
    }

}

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Read up on how to use a Scanner object (check out the tutorials that you can find on Google), and give that a try. You'll likely find that it will suit your needs well. Best of luck and welcome to the forum!