import java.util.*;
import java.util.stream.*;
class Ideone {
public static void main
(String[] args
) { final List
<EntityClass
> queryResultList
= List.
of( EntityClass.of(13),
EntityClass.of(1337),
EntityClass.of(42));
System.
out.
println(queryResultList.
stream() .map(EntityClass::getId)
.collect(Collectors.joining(delimiter)));
}
}
class EntityClass {
private final int id;
private EntityClass(int id) {
this.id = id;
}
public static EntityClass of(int id) {
return new EntityClass(id);
}
public int getId() {
return id;
}
}
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