/*
    TestGenerics5.java
    CIS 260
    David Klick
    1/28/2010
    
    This program demonstrates how Java generics can specify a supertype.
*/

public class TestGenerics5 {
    public static void main(String[] args) {
        Integer[] inums = { 2, 4, 6, 8, 10 };
        Double[] dnums = { 8.2, 3.7, 6.3, 2.8, 9.2 };
        System.out.printf("Sum: %.2f\n", sum(inums));
        System.out.printf("Sum: %.2f\n", sum(dnums));
    }
    
    private static <E extends Number> double sum(E[] a) {
        double sum = 0.0;
        for (E e : a) sum += e.doubleValue();
        return sum;
    }
}