"immutableset" - 1 õppematerjal

Google Guava

Create a transformed view of a collection  Object - {equals, coalesce} Equals (null safe) Coalesce Objects.firstNonNull(obj, default)  Object - ComparisonChain CompareTo method:  Immutable - why Why? · + Your life is easy (no trust problems) · + Free thread safety · + Can be used as a constant · + Uses less memory · - Rejects null values Compared to Collections.unmodifiable? · - overhead · - unsafe · - verbose  Immutable - how Create a set of elements ImmutableSet.of("a", "b", "c", "a", "d", "b") Using a builder public static final ImmutableSet GOOGLE_COLORS = ImmutableSet.builder() .addAll(WEBSAFE_COLORS) .add(new Color(0, 191, 255)) .build(); Creating a defencive copy ImmutableList.copyOf(collection);  Immutable - collections JDK Guava ImmutableCollection ImmutableMultiset ImmutableSortedMultiset ImmutableList