The Most frequent Number in an array

Question

I have this Array i wrote a function MostFreq that takes an array of integers and return 2 values : the more frequent number in the array and its frequency check this code i

Answer 1

Lets suppose the array is as follows :

int arr[] = {10, 20, 10, 20, 30, 20, 20,40,40,50,15,15,15};

int max = 0;
int result = 0;
Map map = new HashMap<>();

for (int i = 0; i < arr.length; i++) {
    if (map.containsKey(arr[i])) 
        map.put(arr[i], map.get(arr[i]) + 1);
    else
        map.put(arr[i], 1);
    int key = map.keySet().iterator().next();
    if (map.get(key) > max) {
        max = map.get(key) ;
        result = key;
    }
}
System.out.println(result);

Explanation:

In the above code I have taken HashMap to store the elements in keys and the repetition of the elements as values. We have initialized variable max = 0 ( max is the maximum count of repeated element) While iterating over elements We are also getting the max count of keys.

The result variable returns the keys with the mostly repeated.