Hi Mark, hi Stuart, hi all, for Map, i think a version with a builder will be cool too, something like:
public interface EntryBuilder<K, V> { public EntryBuilder<K,V> entry(K key, V value); } and by example for HashMap: public static <K, V> HashMap<K, V> fromBuilder(Consumer<? super EntryBuilder<K,V>> consumer) { HashMap<K,V> map = new HashMap<>(); consumer.accept(new EntryBuilder<>() { public EntryBuilder<K,V> entry(K key, V value) { map.put(key, value); return this; } }); return map; } ... HashMap<String, Integer> map = HashMap.fromBuilder(b -> b .entry("foo", 1) .entry("bar", 2)); The builder pattern let us to avoid to create intermediary entry objects. regards, Rémi ----- Mail original ----- > De: "mark reinhold" <mark.reinh...@oracle.com> > À: "stuart marks" <stuart.ma...@oracle.com> > Cc: core-libs-dev@openjdk.java.net > Envoyé: Jeudi 24 Septembre 2015 02:02:17 > Objet: JEP 269: Convenience Factory Methods for Collections > > New JEP Candidate: http://openjdk.java.net/jeps/269 > > - Mark >