Online Java Compiler By
JavaTpoint.com
import java.util.ArrayList; public class UpperBoundWildcard { private static Double add(ArrayList extends Number> num) { double sum=0.0; for(Number n:num) { sum = sum+n.doubleValue(); } return sum; } public static void main(String[] args) { ArrayList
l1=new ArrayList
(); l1.add(10); l1.add(20); System.out.println("displaying the sum= "+add(l1)); ArrayList
l2=new ArrayList
(); l2.add(30.0); l2.add(40.0); System.out.println("displaying the sum= "+add(l2)); } }
Output