Java8: select min value from specific field of the objects in a list

Question

Suppose to have a class Obj

class Obj{

  int field;
}

and that you have a list of Obj instances, i.e. List<Obj> lst.

Now, how can I find in Java8 the minimum value of the int fields field from the objects in list lst?

maczikasz · Accepted Answer · 2014-05-09 07:52:45Z

25

   list.stream().min((o1,o2) -> Integer.compare(o1.field,o2.field))

Additional better solution from the comments by Brian Goetz

list.stream().min(Comparator.comparingInt(Obj::getField))

answered Apr 16, 2014 at 12:46

maczikasz

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2 Comments

This would be better as: list.stream().min(Comparator.comparingInt(Obj::getField))

Didn't know that one, thanks, I think your solution is the best so far

Aniket Thakur · Accepted Answer · 2014-04-16 14:22:58Z

6

You can also do

int min = list.stream().mapToInt(Obj::getField).min();

answered Apr 16, 2014 at 14:22

Aniket Thakur

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