Create a public class called Summer
that provides a single class method named sumLongerThan
.
sumLongerThan
accepts a java.util.Map
from String
to Integer
as its first parameter and an int
as its
second.
It returns the sum as an int
of the values of all of the keys that are longer than the second parameter.
For example:
If the passed Map
is null
or the length is negative, you should throw an IllegalArgumentException
.
As a reminder, you can iterate over the keys in a map like this:
Stuck? You may find these lessons helpful: