Why though

Scala vs Java - most frequent element in array

// scala version
def mostFrequent(arr: Array[Int]): Int = {
  arr.groupBy(identity).maxBy(_._2.size)._1
}

// java version (from https://www.geeksforgeeks.org/frequent-element-array/) 
import java.util.HashMap; 
import java.util.Map; 
import java.util.Map.Entry; 
  
class GFG { 
    static int mostFrequent(int arr[], int n) { 
        // Insert all elements in hash 
        Map<Integer, Integer> hp = new HashMap<Integer, Integer>();
        for(int i = 0; i < n; i++) { 
            int key = arr[i]; 
            if(hp.containsKey(key)) { 
                int freq = hp.get(key); 
                freq++; 
                hp.put(key, freq); 
            } else { 
                hp.put(key, 1); 
            } 
        } 
        // find max frequency. 
        int max_count = 0, res = -1; 
        for(Entry<Integer, Integer> val : hp.entrySet()) { 
            if (max_count < val.getValue()) { 
                res = val.getKey(); 
                max_count = val.getValue(); 
            } 
        } 
        return res; 
    } 
}