The Keyboard class, which simplifies input from a keyboard, is
based on James Slack's Programming and Problem Solving with
Java, published by Brooks/Cole.
Returns a pseudorandom, uniformly distributed int value between
0 (inclusive) and the specified value (exclusive), drawn from
this random number generator's sequence.
A temporary version of java.util.Random that provides the
RandInt (int n) method; should not be necessary because a
similar function has been implemented since JDK 1.2, according
to Sun's documentation for Random.