Java™ How To Program (Early Objects), Tenth Edition

17.8 Generating Streams of Random Values

In Fig. 6.7, we demonstrated rolling a six-sided die 6,000,000 times and summarizing the frequencies of each face using external iteration (a for loop) and a switch statement that determined which counter to increment. We then displayed the results using separate statements that performed external iteration. In Fig. 7.7, we reimplemented Fig. 6.7, replacing the entire switch statement with a single statement that incremented counters in an array—that version of rolling the die still used external iteration to produce and summarize 6,000,000 random rolls and to display the final results. Both prior versions of this example, used mutable variables to control the external iteration and to summarize the results. ...