Find Lucky Integer in an Array

class Solution {
    public int findLucky(int[] arr) {
        
        HashMap<Integer, Integer> lucky = new HashMap<>();
        for(int i=0 ; i<arr.length ; i++){
            if(lucky.containsKey(arr[i])){
                lucky.put(arr[i],lucky.get(arr[i])+1);
            }else{
                lucky.put(arr[i],1);
            }
        }
        int max = -1;
        System.out.println(lucky);
        for(int i=0 ; i<arr.length ; i++){
            if(lucky.get(arr[i])==arr[i]){
                if(arr[i]>max){
                    max = arr[i];
                }
            }
        }
        return max;        
        
    }
}