gc

// create a mutable set
Set<String> set = Sets.newHashSet("Jay", "Betsy");
// create an immutable set
Set<String> set = ImmutableSet.of("Jay", "Betsy", "Jenny");

// create a mutable list
List<String> list = Lists.newArrayList("Jay", "Betsy");
// create an immutable list
List<String> list = ImmutableList.of("Jay", "Betsy", "Jenny");

// create a mutable map
Map<Integer, String> map = Maps.newHashMap(ImmutableMap.of(1, "Jay", 2, "Betsy"));
// create an immutable map
Map<Integer, String> map = ImmutableMap.of(1, "Jay", 2, "Betsy", 3, "Jenny", 4, "Joe");
// create an immutable map (builder)
Map<Integer, String> map = ImmutableMap.<Integer, String> builder().put(1, "Jay").put(2, "Betsy").build();