Java 8 Streams : get non repeated counts

Question

Here is the SQL version for the input and output :

     with tab1 as (

        select 1 as id from dual union all
        select 1 as id from dual union all         


        

Answer 1

An alternative is to filter repeated elements out of the list but it's not very efficient so I would only use it if the list is small:

List result = myList.stream()
                             .filter(i -> Collections.frequency(myList, i) == 1)
                             .collect(toList());