This project contains immutable collections that can be used in older Java projects.
No maven or gradle configuration! Just copy the needed source files into your project.
Implements a decorator for Lists which is immutable.
Use on of these factory methods:
List<String> fromSingleItems = ImmutableList.of("A", "B", "C");
List<String> fromArray = ImmutableList.of(new String[]{"A", "B", "C"});
For Streams you can collect the items:
List<String> collectedFromStream = Stream.of("A", "B", "C")
.collect(ImmutableList.collect());
Implements a decorator for Maps which is immutable.
Map<String, String> fromEntries = ImmutableMap.of(
ImmutableMap.entry("1", "A"),
ImmutableMap.entry("2", "B"),
ImmutableMap.entry("3", "C")
);
Map<String, String> fromMap = ImmutableList.of(new HashMap<>());
For Streams you can collect the items:
Map<String, String> collectedMap = yourStream
.collect(
ImmutableMap.collect(
<keyMapperFunction>,
<valueMapperFunction>
)
);
Implements a decorator for Sets which is immutable.
Use on of these factory methods:
Set<String> fromSingleItems = ImmutableSet.of("A", "B", "C");
Set<String> fromArray = ImmutableSet.of(new String[]{"A", "B", "C"});
From Collection, Iterable or Iterator:
Collection<String> collection = ImmutableList.of("A", "B", "C");
Set<String> fromCollection = ImmutableSet.of(collection);
Iterable<String> iterable = ImmutableList.of("A", "B", "C");
Set<String> fromIterable = ImmutableSet.of(iterable);
Set<String> fromIterator = ImmutableSet.of(collection.iterator());
For Streams you can collect the items:
Set<String> collectedFromStream = Stream.of("A", "B", "C")
.collect(ImmutableSet.collect());
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