Untitled

import java.util.Scanner;

/*
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/**
 *
 * @author Admins
 */
public class PrimeList {

    int primeCount;
    int[] primeList;

    public static void main(String[] args) {

        PrimeList pl = new PrimeList();
        int[] number = pl.inputData();
        pl.processData(number);
        pl.displayData();
    }

    public int[] inputData() {
        primeCount = 0;
        primeList = new int[300];
        Scanner sc = new Scanner(System.in);
        System.out.println("Input Number:");
        int intNumber = sc.nextInt();

        String temp = Integer.toString(intNumber);
        int[] number = new int[temp.length()];

        //convert input number to array
        for (int i = 0; i < temp.length(); i++) {
            number[i] = temp.charAt(i) - '0';
        }

        return number;
    }

    public int[] swapDigit(int[] arr, int i, int j) {
        int temp = arr[i];
        arr[i] = arr[j];
        arr[j] = temp;
        return arr;
    }

    int arrayToInt(int[] arr) {
        //using a Stringbuilder is much more efficient than just using += on a String.
        //if this confuses you, just use a String and write += instead of append.
        StringBuilder s = new StringBuilder();

        for (int i : arr) {
            s.append(i); //add all the ints to a string
        }

        return Integer.parseInt(s.toString()); //parse integer out of the string
    }

    public void processData(int[] number) {
        int tempNumb1 = arrayToInt(number);

        if (isPrime(tempNumb1)) {
            primeList[primeCount] = tempNumb1;
            primeCount++;
        }
        
        System.out.println("Swapping number:");
        for (int i = 0; i < 5; i++) {
            for (int j = i + 1; j < 5; j++) {
                int[] temp = swapDigit(number, i, j);

                int tempNumb = arrayToInt(temp);
                System.out.println(tempNumb);
                if (isPrime(tempNumb)) {
                    primeList[primeCount] = tempNumb;
                    primeCount++;
                }
                
                //swap back to origin array
                number = swapDigit(number, j, i);
            }
        }
    }

    private boolean isPrime(int n) {
        // Corner case
        if (n <= 1) {
            return false;
        }

        // Check from 2 to square root of n
        for (int i = 2; i <= Math.sqrt(n); i++) {
            if (n % i == 0) {
                return false;
            }
        }

        return true;
    }

    public void displayData() {
        System.out.println("List prime number:");
        for (int i = 0; i < primeList.length; i++) {
            if (primeList[i] == 0) {
                break;
            }
            System.out.print(primeList[i] + " ");
        }

        System.out.println("\n--- End ---");
    }
}