Java 8 | Fetch top N unique numbers from list

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Below Java 8 example shows how to fetch top N unique numbers from ArrayList.

 Traditional looping will require more logic to first remove duplicates, sort numbers and then store N numbers to different list.

 Java 8 provides stream API to do all the above steps in single line of code. 

 Descending order (N = 3)


 Ascending order (N = 3)

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