Create a small list from a bigger list, on some criteria

Question

I have a list of java objects, i want to create small list on some criteria for some calculation, so i dont have to loop through all the big list, but create a small list,
what is the best way to do so, i can loop through the big list and then add objects that match the criteria to another list, but is there any other way, like using comparator or some thing any ideas
here is some code for reference
public class Mybean {
private id ;
private name;
private lastname;
//getters and setters
}This is the big list, which may have 1000 objects, and then i want to create a small list where id = 123, then do some calculation,
what is the best way, i am using this loop to create it
for(Mybean mybean: biglist){
if(mybean.getId = 123){
smallListId.add(mybean);
}

Answer 1

If you're going to do this a lot, I'd suggest writing something like:
class Filter<T> {
  List<T> filter(Match<T> matcher, List<T> inputToBeFiltered);
  interface Match<T> {
    public boolean matches(T);
}