Different pairs of given value

 public class GivenValueDiffPairs {

    public void findDiffPairs(List<Integer> values,int k){
        Map<Integer,Integer> params =new HashMap<>();

        int result=0;
        for (Integer value : values) {
            params.put(value,params.getOrDefault(value,0)+1);
        }

        for(Map.Entry<Integer,Integer> entryMap:params.entrySet()){
            int key = entryMap.getKey();

            if(k>0 && (params.containsKey(key+k))){
               ++result;

            }
        }

        System.out.println(params);

        System.out.println(result);

    }

    public static void main(String[] args) {
        //1,1,3,4,5
        //(3,4),(4,5)
        new GivenValueDiffPairs().findDiffPairs(Arrays.asList(3,1,4,1,5),2);
    }
}