sum the values ​​from the specific field of the objects in a list

Suppose we have an Obj class

class Obj{

  int field;

and that you have a list of instances Objfor example List lst.

Now, how can I find in Java8 with streams the sum of the values ​​of the int fields field from the objects in the list lst based on a filter criterion (for example, for an object othe criterion o.field > 10)?

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