Hi there, imagine i have these 3 lines, <ID>,<Genre>,<Year> Ex: 1000,RockAndRoll,2018 1005,Pop,2015 1000,House,2011 and i have

Question

Hi there, imagine i have these 3 lines, <ID>,<Genre>,<Year> Ex: 1000,RockAndRoll,2018 1005,Pop,2015 1000,House,2011 and i have

a class that stores each line info on a ArrayList. How do i prevent the program to create 3 new objects when the first line and second line only have different years?

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19.05.2018

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Mohsen Mahmoudi · Accepted Answer

Mohsen Mahmoudi

why you use arraylist? i think you create a class with three property and then create object per each line then override hashcode of class with your condition now you just create a set<class> of this class and then when you add a object to this set if hashcode was equal, then set feature prevent to add that object

0

19.05.2018

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Hi there, imagine i have these 3 lines, <ID>,<Genre>,<Year> Ex: 1000,RockAndRoll,2018 1005,Pop,2015 1000,House,2011 and i have

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