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Java Java Data Structures Efficiency! Queueing

Michael Timbs
Michael Timbs
15,761 Points

Using Queue


private Queue mSongQueue;

actually read

private Queue<Song> mSongQueue;


What is the 'safest' way to declare this?

1 Answer

Parker Busswood
Parker Busswood
20,207 Points

Yes, you are absolutely correct, and Craig Dennis actually fixes this later in the video, starting around 8:30. When it was implemented without the generic type specified, it threw an error:

./com/teamtreehouse/KaraokeMachine.java:121: error: incompatible types: Object cannot be converted to Song        
        Song song = mSongQueue.poll();