sumoflist.java

Java程序设计技巧与开发实例附书源代码。

public class SumOfList
{
    public static void main(String args[])
    {
        DoubleList list = new DoubleList();
        for (int i = 0; i < 200; i++)
        {
            list.insert( (double) (i + 1));
        }
        try
        {
            double sum = 0.0;
            list.first();
            while (!list.isLast())
            {
                sum += list.retrieveDouble();
                list.next();
            }
            sum += list.retrieveDouble();
            System.out.println("Sum of 1 to 200 is: " + sum);
        }
        catch (ListException le)
        {
            System.err.println("List exception: " + le);
        }
    }
}