A playlist is considered a repeating playlist if any of the songs contain a reference to a previous song in the playlist. Otherwise, the playlist will end with the last song which points to null.

Implement a function isRepeatingPlaylist that returns true if a playlist is repeating or false if it is not.

For example, the following code prints "true" as both songs point to each other.

Song first = new Song("Hello");
Song second = new Song("Eye of the tiger");
    
first.setNextSong(second);
second.setNextSong(first);
    
System.out.println(first.isRepeatingPlaylist());
Java SE 8
 

  •   Example case: java.lang.UnsupportedOperationException at Playlist$Song.isRepeatingPlaylist(Playlist.java:15)
  •   Song will repeat: java.lang.UnsupportedOperationException at Playlist$Song.isRepeatingPlaylist(Playlist.java:15)
  •   Song will not repeat: java.lang.UnsupportedOperationException at Playlist$Song.isRepeatingPlaylist(Playlist.java:15)
  •   Performance test on a large playlist: java.lang.UnsupportedOperationException at Playlist$Song.isRepeatingPlaylist(Playlist.java:15)

Tags
Java Algorithmic thinking Searching Public New
Easy

15min

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