How to remove a field from each object of a list of object?

adarsh :

I have a class FilterEvent with following attributes

filterId
filterValue
filterType

Suppose i have a list of FilterEvent called filterEvents.

I need to remove filterId from each of the object of the list .

I tried in following way

Set<FilterEvent> filterEvents = preparation.getFilterEvents();
filterEvents.stream().map(f->f.setFilterId(null))

to set filterId field set to null . This will not work since my filterId field is of type int .

I need either filterId set to null or need to remove the field itself.

Eran :

map won't work, since it's an intermediate operation, so it won't be executed unless it is followed by some terminal operation.

Use forEach:

Set<FilterEvent> filterEvents = preparation.getFilterEvents();
filterEvents.forEach(f->f.setFilterId(null));

However, if setFilterId expects an int, you can't pass null. You'll have to set it to some other value (0?).