Challenge exercise The following exercises present a challenge because they involve using some things that we have not covered explicitly. Nevertheless, you should be able to make a reasonable attempt at them if you have a comfortable grasp of the material covered so far. They involve adding something that most music players have: a “shuffle,” or “random-play,” feature.
The java.util package contains the Random class whose nextInt method will generate a positive random integer within a limited range. Write a method in the MusicOrganizer class to select a single random track from its list and play it.
Hint: You will need to import Random and create a Random object, either directly in the new method or in the constructor and stored in a field. You will need to find the API documentation for the Random class and check its methods to choose the correct version of nextInt. Alternatively, we cover the Random class in the next chapter.
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