Tukukkk

import java.util.*;





public class PrimeNumber {

    private static ArrayList<Integer> listOfPrime = new ArrayList<Integer>();



    public static void main(String args) {

        Scanner userInput = new Scanner(System.in);

        System.out.print("Please enter a number to checked the list of prime number >  ");

    //Request user to input  number.

        String input = userInput.nextLine();

        int number = 0;

        boolean check = false;

    //Check if integer entered is it integer

        while(check != true) {

            try {

    // if input can be parse into integer, shows that its number so can change check into true to exit the while loop





                number = Integer.parseInt(input);

                check = true;

            }

            catch(NumberFormatException e) {

                System.out.println("Please enter numbers only  >  ");

                input = userInput.nextLine();

            }

        }



    //Check if input enter is 0 or 1, as prime number cannot be those.

        if(number < 2) {

            System.out.println("Prime number cannot be 0 or 1");

        }else {

            checkPrime(number);

        }





    }





    //Check for all prime numbers within the number user input.

    private static void checkPrime(int input) {

        boolean primeValidation = true;

    //first for loop to check from small to biggest integer in the input

        for(int i = 1; i <= input;i++) {

            if(i !=1) {



    //Second for loop to check from prime number in the small to big number.







    //If the number i is 2 or 3, the loop will exit and add into the list as the default is prime, and no option changes it to not prime number.







                for(int x = 2; x < i ; x++) {

                    if(i%x == 0) {

    //If the number is divisable by any number to 0, set it to not prime.

                        primeValidation = false;

                    }       

                }

            }



//if the input is either 0 or 1 set it to false and 0 and 1 is not prime





            else {

                primeValidation = false;

            }

            if(primeValidation == true) {

                listOfPrime.add(i);

            }else {

                primeValidation = true;

            }





        }



        System.out.println("The list of prime numbers of the number " + input + " are "+listOfPrime);





    }



}