No Of Occurrences In An Array

NoOfOccurrencesInAnArray.java

public class NoOfOccuranceInAnArray {
    public static void main(String[] args) {
    
        //Given an integer array a and value v,
        //find the number of Occurancences of v in a
        
        int [] a = {1,2,2,2,2,3,4,5,5,6,7,7,};
        int v = 2;
        
        // Create a HashMap to store element-frequency pairs
        
        Map<Integer,Integer> map = new HashMap<>();
        
        // Iterate through the array to populate the HashMap
        
        for(int i : a){
            if(map.containsKey(i)){
            
                // If the element is already in the map, increment its frequency
                
                map.put(i,map.get(i) + 1);
            }
            else{
                // If the element is not in the map, add it with a frequency of 1
                
                map.put(i,1);
            }
        }
        System.out.println(map.get(v));
    }
}