count occurrences in seven integers using java single dimension arrays

1import java.util.Scanner;
2
3public class SevenNumbersCount {
4
5    public static int count(int[] arr, int num) {
6        int count = 0;
7        for(int i = 0; i < arr.length; ++i) {   // go through all elements in array
8            if(arr[i] == num) { // if num is found, increase count
9                count++;    // increment count
10            }
11        }
12        return count;   // return the count of number of occurrences of num in array
13    }
14
15    public static boolean checkIfElementAlreadyExists(int[] arr, int index) {
16        for(int i = 0; i < index; ++i) {    // go through all elements in array
17            if(arr[i] == arr[index]) {  // if item in index already exists in the array
18                return true;    // then return true
19            }
20        }
21        return false;   // if element at index does not previously occur, then return false
22    }
23
24    public static void main(String[] args) {
25        Scanner in = new Scanner(System.in);
26        int[] arr = new int[7];
27        System.out.print("Enter seven numbers: ");
28        for(int i = 0; i < arr.length; ++i) {
29            arr[i] = in.nextInt();  // read 7 numbers into array
30        }
31        for(int i = 0; i < arr.length; ++i) {   // go through all elements
32            if(!checkIfElementAlreadyExists(arr, i)) {  // if this element did not already appear before in the array
33                System.out.printf("Number %d occurs %d times.\n", arr[i], count(arr, arr[i]));  // then print the number and the number of time it occurs in the array
34            }
35        }
36    }
37}
38
39

1public static int count(int[] arr, int num) {
2        int count = 0;
3        for(int i = 0; i < arr.length; ++i) {   // go through all elements in array
4            if(arr[i] == num) { // if num is found, increase count
5                count++;    // increment count
6            }
7        }
8        return count;   // return the count of number of occurrences of num in array
9    }
10
11    public static boolean checkIfElementAlreadyExists(int[] arr, int index) {
12        for(int i = 0; i < index; ++i) {    // go through all elements in array
13            if(arr[i] == arr[index]) {  // if item in index already exists in the array
14                return true;    // then return true
15            }
16        }
17        return false;   // if element at index does not previously occur, then return false
18    }
19
20    public static void main(String[] args) {
21        Scanner in = new Scanner(System.in);
22        int[] arr = new int[7];
23        System.out.print("Enter seven numbers: ");
24        for(int i = 0; i < arr.length; ++i) {
25            arr[i] = in.nextInt();  // read 7 numbers into array
26        }
27        for(int i = 0; i < arr.length; ++i) {   // go through all elements
28            if(!checkIfElementAlreadyExists(arr, i)) {  // if this element did not already appear before in the array
29                System.out.printf("Number %d occurs %d times.\n", arr[i], count(arr, arr[i]));  // then print the number and the number of time it occurs in the array
30            }
31        }
32    }
33}
34