sumOfSquares import java.util.*; public class Arraylistoperation { public static void main(String args[]) { ArrayList list = createSquaresList(10); printList(list); } public static ArrayList createSquaresList(int n) { ArrayList squares= new ArrayList<>(); double s = 0.0; for (double i = 0.0; i <= n-1; i++) { s = i*i; squares.add(s); } return squares; for(int i = 0; i < m.size(); i++) { s+= m.get(i); } return s; } } Like wise sumOfCubes Solution sumOfSquares import java.util.*; public class Arraylistoperation { public static void main(String args[]) { ArrayList list = createSquaresList(10); printList(list); } public static ArrayList createSquaresList(int n) { ArrayList squares= new ArrayList<>(); double s = 0.0; for (double i = 0.0; i <= n-1; i++) { s = i*i; squares.add(s); } return squares; for(int i = 0; i < m.size(); i++) { s+= m.get(i); } return s; } } Like wise sumOfCubes.