Hello Friend,

Try this:

import java.util.*;
class EvenNumber{
 public boolean findEven(int num){
     if(num%2==0){
         return true;
     }
     return false;
 }
 public int average(int sum){
     int avg=sum/10;
     return avg;
 }
 public int smallerThanAverage(int num,int sum){
     int avg=average(sum);
     if(num<avg){
         return num;
     }
    return 0;
 }

 public int greaterThanAverage(int num,int sum){
     int avg=average(sum);
     if(num>avg){
         return num;
     }
    return 0;
 }
}
public class Tester{
    public static void main(String[] args){
        EvenNumber even=new EvenNumber();
        int sum=0;
        ArrayList<Integer> list=new ArrayList<Integer>();
        Scanner input = new Scanner(System.in);
        System.out.println("Enter 10 numbers:");
        for (int i=1;i<=10;i++){
            int number = input.nextInt();
            list.add(number);
        }
        System.out.println("Even Numbers are: ");
        for(int i=0;i<list.size();i++){
            sum+=list.get(i);
            if(even.findEven(list.get(i))){
            System.out.println(list.get(i));
            }
        }
        int avg=even.average(sum);
        System.out.println("Average of numbers: "+avg);
        System.out.println("Numbers smaller than Average: ");
        for(int i=0;i<list.size();i++){
        int num=even.smallerThanAverage(list.get(i),sum);
        if(num!=0){
        System.out.println(num);
        }
        }

        System.out.println("Numbers greater than Average: ");
        for(int i=0;i<list.size();i++){
        int num=even.greaterThanAverage(list.get(i),sum);
        if(num!=0){
        System.out.println(num);
        }
        }
            }
}

Thanks