Find Nearest element of Given Number

 import java.util.*;

public class FindNearestElementInArrayForGivenNumber {


    public static int findNearestElement(int[] a,int number){
        Map<Integer,Integer> params =new HashMap<>();
        for(int i=0;i<a.length;i++){
            params.put(Math.abs(a[i]-number),a[i]);
        }

        List<Integer> keySetList = new ArrayList<>(params.keySet());
        Collections.sort(keySetList);

        return params.get(keySetList.get(0));
    }

    public static void main(String[] args) {
       int[] e = {5,10,15,20};
        System.out.println("Nearest element:"+
                findNearestElement(e,11));


    }
}