All Superinterfaces:

ImmutableMapIterable<K,V>, InternalIterable<V>, Iterable<V>, MapIterable<K,V>, RichIterable<V>, UnsortedMapIterable<K,V>
```
public interface ImmutableMap<K,V>
extends UnsortedMapIterable<K,V>, ImmutableMapIterable<K,V>
```
An ImmutableMap is different from a JCF Map because it has no mutating methods. It provides the read-only protocol of a JDK Map.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods Deprecated Methods
Modifier and Type	Method	Description
`default <K1,V1,V2> ImmutableMap<K1,V2>`	`aggregateBy(Function<? super K,? extends K1> keyFunction, Function<? super V,? extends V1> valueFunction, Function0<? extends V2> zeroValueFactory, Function2<? super V2,? super V1,? extends V2> nonMutatingAggregator)`	Applies an aggregate function over the map grouping results into a map based on the specific key and value groupBy functions.
`default <KK,VV> ImmutableMap<KK,VV>`	`aggregateBy(Function<? super V,? extends KK> groupBy, Function0<? extends VV> zeroValueFactory, Function2<? super VV,? super V,? extends VV> nonMutatingAggregator)`	Applies an aggregate function over the iterable grouping results into a map based on the specific groupBy function.
`default <KK,VV> ImmutableMap<KK,VV>`	`aggregateInPlaceBy(Function<? super V,? extends KK> groupBy, Function0<? extends VV> zeroValueFactory, Procedure2<? super VV,? super V> mutatingAggregator)`	Applies an aggregate procedure over the iterable grouping results into a Map based on the specific groupBy function.
`<VV> ImmutableBag<VV>`	`collect(Function<? super V,? extends VV> function)`	Returns a new collection with the results of applying the specified function on each element of the source collection.
`<K2,V2> ImmutableMap<K2,V2>`	`collect(Function2<? super K,? super V,Pair<K2,V2>> function)`	For each key and value of the map the function is evaluated.
`ImmutableBooleanBag`	`collectBoolean(BooleanFunction<? super V> booleanFunction)`	Returns a new primitive `boolean` iterable with the results of applying the specified function on each element of the source collection.
`ImmutableByteBag`	`collectByte(ByteFunction<? super V> byteFunction)`	Returns a new primitive `byte` iterable with the results of applying the specified function on each element of the source collection.
`ImmutableCharBag`	`collectChar(CharFunction<? super V> charFunction)`	Returns a new primitive `char` iterable with the results of applying the specified function on each element of the source collection.
`ImmutableDoubleBag`	`collectDouble(DoubleFunction<? super V> doubleFunction)`	Returns a new primitive `double` iterable with the results of applying the specified function on each element of the source collection.
`ImmutableFloatBag`	`collectFloat(FloatFunction<? super V> floatFunction)`	Returns a new primitive `float` iterable with the results of applying the specified function on each element of the source collection.
`<R> ImmutableBag<R>`	`collectIf(Predicate<? super V> predicate, Function<? super V,? extends R> function)`	Returns a new collection with the results of applying the specified function on each element of the source collection, but only for those elements which return true upon evaluation of the predicate.
`ImmutableIntBag`	`collectInt(IntFunction<? super V> intFunction)`	Returns a new primitive `int` iterable with the results of applying the specified function on each element of the source collection.
`ImmutableLongBag`	`collectLong(LongFunction<? super V> longFunction)`	Returns a new primitive `long` iterable with the results of applying the specified function on each element of the source collection.
`ImmutableShortBag`	`collectShort(ShortFunction<? super V> shortFunction)`	Returns a new primitive `short` iterable with the results of applying the specified function on each element of the source collection.
`<R> ImmutableMap<K,R>`	`collectValues(Function2<? super K,? super V,? extends R> function)`	For each key and value of the map the function is evaluated.
`<P,VV> ImmutableBag<VV>`	`collectWith(Function2<? super V,? super P,? extends VV> function, P parameter)`	Same as `RichIterable.collect(Function)` with a `Function2` and specified parameter which is passed to the block.
`<R> ImmutableBag<R>`	`flatCollect(Function<? super V,? extends Iterable<R>> function)`	`flatCollect` is a special case of `RichIterable.collect(Function)`.
`default <P,R> ImmutableBag<R>`	`flatCollectWith(Function2<? super V,? super P,? extends Iterable<R>> function, P parameter)`
`ImmutableSetMultimap<V,K>`	`flip()`	Given a map from Domain `->` Range return a multimap from Range `->` Domain.
`ImmutableMap<V,K>`	`flipUniqueValues()`	Return the MapIterable that is obtained by flipping the direction of this map and making the associations from value to key.
`<VV> ImmutableBagMultimap<VV,V>`	`groupBy(Function<? super V,? extends VV> function)`	For each element of the iterable, the function is evaluated and the results of these evaluations are collected into a new multimap, where the transformed value is the key and the original values are added to the same (or similar) species of collection as the source iterable.
`<VV> ImmutableBagMultimap<VV,V>`	`groupByEach(Function<? super V,? extends Iterable<VV>> function)`	Similar to `RichIterable.groupBy(Function)`, except the result of evaluating function will return a collection of keys for each value.
`default <V1> ImmutableMap<V1,V>`	`groupByUniqueKey(Function<? super V,? extends V1> function)`	For each element of the iterable, the function is evaluated, and the results of these evaluations are collected into a new map, where the transformed value is the key.
`ImmutableMap<K,V>`	`newWithAllKeyValueArguments(Pair<? extends K,? extends V>... keyValuePairs)`
`ImmutableMap<K,V>`	`newWithAllKeyValues(Iterable<? extends Pair<? extends K,? extends V>> keyValues)`
`ImmutableMap<K,V>`	`newWithKeyValue(K key, V value)`
`ImmutableMap<K,V>`	`newWithMap(Map<? extends K,? extends V> map)`
`ImmutableMap<K,V>`	`newWithMapIterable(MapIterable<? extends K,? extends V> mapIterable)`
`ImmutableMap<K,V>`	`newWithoutAllKeys(Iterable<? extends K> keys)`
`ImmutableMap<K,V>`	`newWithoutKey(K key)`
`PartitionImmutableBag<V>`	`partition(Predicate<? super V> predicate)`	Filters a collection into a PartitionedIterable based on the evaluation of the predicate.
`<P> PartitionImmutableBag<V>`	`partitionWith(Predicate2<? super V,? super P> predicate, P parameter)`	Filters a collection into a PartitionIterable based on the evaluation of the predicate.
`ImmutableBag<V>`	`reject(Predicate<? super V> predicate)`	Returns all elements of the source collection that return false when evaluating of the predicate.
`ImmutableMap<K,V>`	`reject(Predicate2<? super K,? super V> predicate)`	For each key and value of the map the predicate is evaluated, if the result of the evaluation is false, that key and value are returned in a new map.
`<P> ImmutableBag<V>`	`rejectWith(Predicate2<? super V,? super P> predicate, P parameter)`	Similar to `RichIterable.reject(Predicate)`, except with an evaluation parameter for the second generic argument in `Predicate2`.
`ImmutableBag<V>`	`select(Predicate<? super V> predicate)`	Returns all elements of the source collection that return true when evaluating the predicate.
`ImmutableMap<K,V>`	`select(Predicate2<? super K,? super V> predicate)`	For each key and value of the map the predicate is evaluated, if the result of the evaluation is true, that key and value are returned in a new map.
`<S> ImmutableBag<S>`	`selectInstancesOf(Class<S> clazz)`	Returns all elements of the source collection that are instances of the Class `clazz`.
`<P> ImmutableBag<V>`	`selectWith(Predicate2<? super V,? super P> predicate, P parameter)`	Similar to `RichIterable.select(Predicate)`, except with an evaluation parameter for the second generic argument in `Predicate2`.
`ImmutableMap<K,V>`	`tap(Procedure<? super V> procedure)`	Executes the Procedure for each value of the map and returns `this`.
`MutableMap<K,V>`	`toMap()`
`<S> ImmutableBag<Pair<V,S>>`	`zip(Iterable<S> that)`	Deprecated. in 6.0.
`ImmutableSet<Pair<V,Integer>>`	`zipWithIndex()`	Deprecated. in 6.0.

Methods inherited from interface org.eclipse.collections.api.map.ImmutableMapIterable
castToMap, countBy, countByEach, countByWith

Methods inherited from interface org.eclipse.collections.api.InternalIterable
forEach, forEachWith, forEachWithIndex

Methods inherited from interface java.lang.Iterable
iterator

Methods inherited from interface org.eclipse.collections.api.map.MapIterable
containsKey, containsValue, detect, detectOptional, equals, forEach, forEachKey, forEachKeyValue, forEachValue, get, getIfAbsent, getIfAbsentValue, getIfAbsentWith, getOrDefault, hashCode, ifPresentApply, injectIntoKeyValue, keysView, keyValuesView, parallelStream, spliterator, stream, toString, valuesView

Methods inherited from interface org.eclipse.collections.api.RichIterable
aggregateBy, allSatisfy, allSatisfyWith, anySatisfy, anySatisfyWith, appendString, appendString, appendString, asLazy, chunk, collect, collectBoolean, collectByte, collectChar, collectDouble, collectFloat, collectIf, collectInt, collectLong, collectShort, collectWith, contains, containsAll, containsAllArguments, containsAllIterable, containsAny, containsAnyIterable, containsBy, containsNone, containsNoneIterable, count, countBy, countByEach, countByWith, countWith, detect, detectIfNone, detectOptional, detectWith, detectWithIfNone, detectWithOptional, each, flatCollect, flatCollectBoolean, flatCollectByte, flatCollectChar, flatCollectDouble, flatCollectFloat, flatCollectInt, flatCollectLong, flatCollectShort, flatCollectWith, forEach, getAny, getFirst, getLast, getOnly, groupBy, groupByAndCollect, groupByEach, groupByUniqueKey, injectInto, injectInto, injectInto, injectInto, injectInto, injectIntoDouble, injectIntoFloat, injectIntoInt, injectIntoLong, into, isEmpty, makeString, makeString, makeString, makeString, max, max, maxBy, maxByOptional, maxOptional, maxOptional, min, min, minBy, minByOptional, minOptional, minOptional, noneSatisfy, noneSatisfyWith, notEmpty, reduce, reduceInPlace, reduceInPlace, reject, rejectWith, select, selectWith, size, sumByDouble, sumByFloat, sumByInt, sumByLong, summarizeDouble, summarizeFloat, summarizeInt, summarizeLong, sumOfDouble, sumOfFloat, sumOfInt, sumOfLong, toArray, toArray, toBag, toBiMap, toImmutableBag, toImmutableBiMap, toImmutableList, toImmutableMap, toImmutableSet, toImmutableSortedBag, toImmutableSortedBag, toImmutableSortedBagBy, toImmutableSortedList, toImmutableSortedList, toImmutableSortedListBy, toImmutableSortedSet, toImmutableSortedSet, toImmutableSortedSetBy, toList, toMap, toMap, toSet, toSortedBag, toSortedBag, toSortedBagBy, toSortedList, toSortedList, toSortedListBy, toSortedMap, toSortedMap, toSortedMapBy, toSortedSet, toSortedSet, toSortedSetBy, zip, zipWithIndex

Methods inherited from interface org.eclipse.collections.api.map.UnsortedMapIterable
toImmutable

- Method Detail
  - newWithKeyValue
```
ImmutableMap<K,V> newWithKeyValue(K key,
                                        V value)
```
    Specified by:
    
    newWithKeyValue in interface ImmutableMapIterable<K,V>
  - newWithAllKeyValues
```
ImmutableMap<K,V> newWithAllKeyValues(Iterable<? extends Pair<? extends K,? extends V>> keyValues)
```
    Specified by:
    
    newWithAllKeyValues in interface ImmutableMapIterable<K,V>
  - newWithMap
```
ImmutableMap<K,V> newWithMap(Map<? extends K,? extends V> map)
```
    Specified by:
    
    newWithMap in interface ImmutableMapIterable<K,V>
  - newWithMapIterable
```
ImmutableMap<K,V> newWithMapIterable(MapIterable<? extends K,? extends V> mapIterable)
```
    Specified by:
    
    newWithMapIterable in interface ImmutableMapIterable<K,V>
  - newWithAllKeyValueArguments
```
ImmutableMap<K,V> newWithAllKeyValueArguments(Pair<? extends K,? extends V>... keyValuePairs)
```
    Specified by:
    
    newWithAllKeyValueArguments in interface ImmutableMapIterable<K,V>
  - newWithoutKey
```
ImmutableMap<K,V> newWithoutKey(K key)
```
    Specified by:
    
    newWithoutKey in interface ImmutableMapIterable<K,V>
  - newWithoutAllKeys
```
ImmutableMap<K,V> newWithoutAllKeys(Iterable<? extends K> keys)
```
    Specified by:
    
    newWithoutAllKeys in interface ImmutableMapIterable<K,V>
  - toMap
```
MutableMap<K,V> toMap()
```
  - flip
```
ImmutableSetMultimap<V,K> flip()
```
    Description copied from interface: MapIterable
    
    Given a map from Domain -> Range return a multimap from Range -> Domain. We chose the name 'flip' rather than 'invert' or 'transpose' since this method does not have the property of applying twice returns the original.
    Since the keys in the input are unique, the values in the output are unique, so the return type should be a SetMultimap. However, since SetMultimap and SortedSetMultimap don't inherit from one another, SetMultimap here does not allow SortedMapIterable to have a SortedSetMultimap return. Thus, we compromise and call this Multimap, even though all implementations will be a SetMultimap or SortedSetMultimap.
    
    Specified by:
    
    flip in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    flip in interface MapIterable<K,V>
    
    Specified by:
    
    flip in interface UnsortedMapIterable<K,V>
  - select
```
ImmutableMap<K,V> select(Predicate2<? super K,? super V> predicate)
```
    Description copied from interface: MapIterable
    For each key and value of the map the predicate is evaluated, if the result of the evaluation is true, that key and value are returned in a new map.
    MapIterable<City, Person> selected = peopleByCity.select((city, person) -> city.getName().equals("Anytown") && person.getLastName().equals("Smith"));
    Specified by:
    
    select in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    select in interface MapIterable<K,V>
    
    Specified by:
    
    select in interface UnsortedMapIterable<K,V>
  - reject
```
ImmutableMap<K,V> reject(Predicate2<? super K,? super V> predicate)
```
    Description copied from interface: MapIterable
    For each key and value of the map the predicate is evaluated, if the result of the evaluation is false, that key and value are returned in a new map.
    MapIterable<City, Person> rejected = peopleByCity.reject((city, person) -> city.getName().equals("Anytown") && person.getLastName().equals("Smith"));
    Specified by:
    
    reject in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    reject in interface MapIterable<K,V>
    
    Specified by:
    
    reject in interface UnsortedMapIterable<K,V>
  - tap
```
ImmutableMap<K,V> tap(Procedure<? super V> procedure)
```
    Description copied from interface: MapIterable
    Executes the Procedure for each value of the map and returns this.
    return peopleByCity.tap(person -> LOGGER.info(person.getName()));
    Specified by:
    
    tap in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    tap in interface MapIterable<K,V>
    
    Specified by:
    
    tap in interface RichIterable<K>
    
    Specified by:
    
    tap in interface UnsortedMapIterable<K,V>
    
    See Also:
    
    RichIterable.forEach(Procedure)
  - select
```
ImmutableBag<V> select(Predicate<? super V> predicate)
```
    Description copied from interface: RichIterable
    Returns all elements of the source collection that return true when evaluating the predicate. This method is also commonly called filter.
    Example using a Java 8 lambda expression:
    RichIterable<Person> selected = people.select(person -> person.getAddress().getCity().equals("London"));
    Specified by:
    
    select in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    select in interface RichIterable<K>
    
    Specified by:
    
    select in interface UnsortedMapIterable<K,V>
  - selectWith
```
<P> ImmutableBag<V> selectWith(Predicate2<? super V,? super P> predicate,
                               P parameter)
```
    Description copied from interface: RichIterable
    Similar to RichIterable.select(Predicate), except with an evaluation parameter for the second generic argument in Predicate2.
    E.g. return a Collection of Person elements where the person has an age greater than or equal to 18 years
    Example using a Java 8 lambda expression:
    RichIterable<Person> selected = people.selectWith((Person person, Integer age) -> person.getAge()>= age, Integer.valueOf(18));
    Specified by:
    
    selectWith in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    selectWith in interface RichIterable<K>
    
    Specified by:
    
    selectWith in interface UnsortedMapIterable<K,V>
    
    Parameters:
    
    predicate - a Predicate2 to use as the select criteria
    
    parameter - a parameter to pass in for evaluation of the second argument P in predicate
    
    See Also:
    
    RichIterable.select(Predicate)
  - reject
```
ImmutableBag<V> reject(Predicate<? super V> predicate)
```
    Description copied from interface: RichIterable
    Returns all elements of the source collection that return false when evaluating of the predicate. This method is also sometimes called filterNot and is the equivalent of calling iterable.select(Predicates.not(predicate)).
    Example using a Java 8 lambda expression:
    RichIterable<Person> rejected = people.reject(person -> person.person.getLastName().equals("Smith"));
    Specified by:
    
    reject in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    reject in interface RichIterable<K>
    
    Specified by:
    
    reject in interface UnsortedMapIterable<K,V>
    
    Parameters:
    
    predicate - a Predicate to use as the reject criteria
    
    Returns:
    
    a RichIterable that contains elements that cause Predicate.accept(Object) method to evaluate to false
  - rejectWith
```
<P> ImmutableBag<V> rejectWith(Predicate2<? super V,? super P> predicate,
                               P parameter)
```
    Description copied from interface: RichIterable
    Similar to RichIterable.reject(Predicate), except with an evaluation parameter for the second generic argument in Predicate2.
    E.g. return a Collection of Person elements where the person has an age greater than or equal to 18 years
    Example using a Java 8 lambda expression:
    RichIterable<Person> rejected = people.rejectWith((Person person, Integer age) -> person.getAge() < age, Integer.valueOf(18));
    Specified by:
    
    rejectWith in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    rejectWith in interface RichIterable<K>
    
    Specified by:
    
    rejectWith in interface UnsortedMapIterable<K,V>
    
    Parameters:
    
    predicate - a Predicate2 to use as the select criteria
    
    parameter - a parameter to pass in for evaluation of the second argument P in predicate
    
    See Also:
    
    RichIterable.select(Predicate)
  - partition
```
PartitionImmutableBag<V> partition(Predicate<? super V> predicate)
```
    Description copied from interface: RichIterable
    Filters a collection into a PartitionedIterable based on the evaluation of the predicate.
    Example using a Java 8 lambda expression:
    PartitionIterable<Person> newYorkersAndNonNewYorkers = people.partition(person -> person.getAddress().getState().getName().equals("New York"));
    Specified by:
    
    partition in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    partition in interface RichIterable<K>
    
    Specified by:
    
    partition in interface UnsortedMapIterable<K,V>
  - partitionWith
```
<P> PartitionImmutableBag<V> partitionWith(Predicate2<? super V,? super P> predicate,
                                           P parameter)
```
    Description copied from interface: RichIterable
    Filters a collection into a PartitionIterable based on the evaluation of the predicate.
    Example using a Java 8 lambda expression:
    PartitionIterable<Person> newYorkersAndNonNewYorkers = people.partitionWith((Person person, String state) -> person.getAddress().getState().getName().equals(state), "New York");
    Specified by:
    
    partitionWith in interface RichIterable<K>
    
    Specified by:
    
    partitionWith in interface UnsortedMapIterable<K,V>
  - selectInstancesOf
```
<S> ImmutableBag<S> selectInstancesOf(Class<S> clazz)
```
    Description copied from interface: RichIterable
    Returns all elements of the source collection that are instances of the Class clazz.
    RichIterable<Integer> integers = List.mutable.with(new Integer(0), new Long(0L), new Double(0.0)).selectInstancesOf(Integer.class);
    Specified by:
    
    selectInstancesOf in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    selectInstancesOf in interface RichIterable<K>
    
    Specified by:
    
    selectInstancesOf in interface UnsortedMapIterable<K,V>
  - collect
```
<K2,V2> ImmutableMap<K2,V2> collect(Function2<? super K,? super V,Pair<K2,V2>> function)
```
    Description copied from interface: MapIterable
    For each key and value of the map the function is evaluated. The results of these evaluations are returned in a new map. The map returned will use the values projected from the function rather than the original values.
    MapIterable<String, String> collected = peopleByCity.collect((City city, Person person) -> Pair.of(city.getCountry(), person.getAddress().getCity()));
    Specified by:
    
    collect in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    collect in interface MapIterable<K,V>
    
    Specified by:
    
    collect in interface UnsortedMapIterable<K,V>
  - collectValues
```
<R> ImmutableMap<K,R> collectValues(Function2<? super K,? super V,? extends R> function)
```
    Description copied from interface: MapIterable
    For each key and value of the map the function is evaluated. The results of these evaluations are returned in a new map. The map returned will use the values projected from the function rather than the original values.
    MapIterable<City, String> collected = peopleByCity.collectValues((City city, Person person) -> person.getFirstName() + " " + person.getLastName());
    Specified by:
    
    collectValues in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    collectValues in interface MapIterable<K,V>
    
    Specified by:
    
    collectValues in interface UnsortedMapIterable<K,V>
  - collect
```
<VV> ImmutableBag<VV> collect(Function<? super V,? extends VV> function)
```
    Description copied from interface: RichIterable
    Returns a new collection with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.
    Example using a Java 8 lambda expression:
    RichIterable<String> names = people.collect(person -> person.getFirstName() + " " + person.getLastName());
    Specified by:
    
    collect in interface RichIterable<K>
    
    Specified by:
    
    collect in interface UnsortedMapIterable<K,V>
  - collectWith
```
<P,VV> ImmutableBag<VV> collectWith(Function2<? super V,? super P,? extends VV> function,
                                          P parameter)
```
    Description copied from interface: RichIterable
    Same as RichIterable.collect(Function) with a Function2 and specified parameter which is passed to the block.
    Example using a Java 8 lambda expression:
    RichIterable<Integer> integers = Lists.mutable.with(1, 2, 3).collectWith((each, parameter) -> each + parameter, Integer.valueOf(1));
    Specified by:
    
    collectWith in interface RichIterable<K>
    
    Specified by:
    
    collectWith in interface UnsortedMapIterable<K,V>
    
    Parameters:
    
    function - A Function2 to use as the collect transformation function
    
    parameter - A parameter to pass in for evaluation of the second argument P in function
    
    Returns:
    
    A new RichIterable that contains the transformed elements returned by Function2.value(Object, Object)
    
    See Also:
    
    RichIterable.collect(Function)
  - collectBoolean
```
ImmutableBooleanBag collectBoolean(BooleanFunction<? super V> booleanFunction)
```
    Description copied from interface: RichIterable
    Returns a new primitive boolean iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.
    Example using a Java 8 lambda expression:
    BooleanIterable licenses = people.collectBoolean(person -> person.hasDrivingLicense());
    Specified by:
    
    collectBoolean in interface RichIterable<K>
    
    Specified by:
    
    collectBoolean in interface UnsortedMapIterable<K,V>
  - collectByte
```
ImmutableByteBag collectByte(ByteFunction<? super V> byteFunction)
```
    Description copied from interface: RichIterable
    Returns a new primitive byte iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.
    Example using a Java 8 lambda expression:
    ByteIterable bytes = people.collectByte(person -> person.getCode());
    Specified by:
    
    collectByte in interface RichIterable<K>
    
    Specified by:
    
    collectByte in interface UnsortedMapIterable<K,V>
  - collectChar
```
ImmutableCharBag collectChar(CharFunction<? super V> charFunction)
```
    Description copied from interface: RichIterable
    Returns a new primitive char iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.
    Example using a Java 8 lambda expression:
    CharIterable chars = people.collectChar(person -> person.getMiddleInitial());
    Specified by:
    
    collectChar in interface RichIterable<K>
    
    Specified by:
    
    collectChar in interface UnsortedMapIterable<K,V>
  - collectDouble
```
ImmutableDoubleBag collectDouble(DoubleFunction<? super V> doubleFunction)
```
    Description copied from interface: RichIterable
    Returns a new primitive double iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.
    Example using a Java 8 lambda expression:
    DoubleIterable doubles = people.collectDouble(person -> person.getMilesFromNorthPole());
    Specified by:
    
    collectDouble in interface RichIterable<K>
    
    Specified by:
    
    collectDouble in interface UnsortedMapIterable<K,V>
  - collectFloat
```
ImmutableFloatBag collectFloat(FloatFunction<? super V> floatFunction)
```
    Description copied from interface: RichIterable
    Returns a new primitive float iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.
    Example using a Java 8 lambda expression:
    FloatIterable floats = people.collectFloat(person -> person.getHeightInInches());
    Specified by:
    
    collectFloat in interface RichIterable<K>
    
    Specified by:
    
    collectFloat in interface UnsortedMapIterable<K,V>
  - collectInt
```
ImmutableIntBag collectInt(IntFunction<? super V> intFunction)
```
    Description copied from interface: RichIterable
    Returns a new primitive int iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.
    Example using a Java 8 lambda expression:
    IntIterable ints = people.collectInt(person -> person.getAge());
    Specified by:
    
    collectInt in interface RichIterable<K>
    
    Specified by:
    
    collectInt in interface UnsortedMapIterable<K,V>
  - collectLong
```
ImmutableLongBag collectLong(LongFunction<? super V> longFunction)
```
    Description copied from interface: RichIterable
    Returns a new primitive long iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.
    Example using a Java 8 lambda expression:
    LongIterable longs = people.collectLong(person -> person.getGuid());
    Specified by:
    
    collectLong in interface RichIterable<K>
    
    Specified by:
    
    collectLong in interface UnsortedMapIterable<K,V>
  - collectShort
```
ImmutableShortBag collectShort(ShortFunction<? super V> shortFunction)
```
    Description copied from interface: RichIterable
    Returns a new primitive short iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.
    Example using a Java 8 lambda expression:
    ShortIterable shorts = people.collectShort(person -> person.getNumberOfJunkMailItemsReceivedPerMonth());
    Specified by:
    
    collectShort in interface RichIterable<K>
    
    Specified by:
    
    collectShort in interface UnsortedMapIterable<K,V>
  - collectIf
```
<R> ImmutableBag<R> collectIf(Predicate<? super V> predicate,
                              Function<? super V,? extends R> function)
```
    Description copied from interface: RichIterable
    Returns a new collection with the results of applying the specified function on each element of the source collection, but only for those elements which return true upon evaluation of the predicate. This is the optimized equivalent of calling iterable.select(predicate).collect(function).
    Example using a Java 8 lambda and method reference:
    RichIterable<String> strings = Lists.mutable.with(1, 2, 3).collectIf(e -> e != null, Object::toString);
    
    Example using Predicates factory:
    RichIterable<String> strings = Lists.mutable.with(1, 2, 3).collectIf(Predicates.notNull(), Functions.getToString());
    Specified by:
    
    collectIf in interface RichIterable<K>
    
    Specified by:
    
    collectIf in interface UnsortedMapIterable<K,V>
  - flatCollect
```
<R> ImmutableBag<R> flatCollect(Function<? super V,? extends Iterable<R>> function)
```
    Description copied from interface: RichIterable
    flatCollect is a special case of RichIterable.collect(Function). With collect, when the Function returns a collection, the result is a collection of collections. flatCollect outputs a single "flattened" collection instead. This method is commonly called flatMap.
    Consider the following example where we have a Person class, and each Person has a list of Address objects. Take the following Function:
    Function<Person, List<Address>> addressFunction = Person::getAddresses; RichIterable<Person> people = ...;
    Using collect returns a collection of collections of addresses.
    RichIterable<List<Address>> addresses = people.collect(addressFunction);
    Using flatCollect returns a single flattened list of addresses.
    RichIterable<Address> addresses = people.flatCollect(addressFunction);
    Specified by:
    
    flatCollect in interface RichIterable<K>
    
    Specified by:
    
    flatCollect in interface UnsortedMapIterable<K,V>
    
    Parameters:
    
    function - The Function to apply
    
    Returns:
    
    a new flattened collection produced by applying the given function
  - flatCollectWith
```
default <P,R> ImmutableBag<R> flatCollectWith(Function2<? super V,? super P,? extends Iterable<R>> function,
                                                    P parameter)
```
    Specified by:
    
    flatCollectWith in interface RichIterable<K>
    
    Specified by:
    
    flatCollectWith in interface UnsortedMapIterable<K,V>
    
    Since:
    
    9.2
  - zip
```
@Deprecated
<S> ImmutableBag<Pair<V,S>> zip(Iterable<S> that)
```
    Deprecated.
    in 6.0. Use OrderedIterable.zip(Iterable) instead.
    
    Description copied from interface: RichIterable
    
    Returns a RichIterable formed from this RichIterable and another RichIterable by combining corresponding elements in pairs. If one of the two RichIterables is longer than the other, its remaining elements are ignored.
    
    Specified by:
    
    zip in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    zip in interface RichIterable<K>
    
    Specified by:
    
    zip in interface UnsortedMapIterable<K,V>
    
    Type Parameters:
    
    S - the type of the second half of the returned pairs
    
    Parameters:
    
    that - The RichIterable providing the second half of each result pair
    
    Returns:
    
    A new RichIterable containing pairs consisting of corresponding elements of this RichIterable and that. The length of the returned RichIterable is the minimum of the lengths of this RichIterable and that.
  - zipWithIndex
```
@Deprecated
ImmutableSet<Pair<V,Integer>> zipWithIndex()
```
    Deprecated.
    in 6.0. Use OrderedIterable.zipWithIndex() instead.
    
    Description copied from interface: RichIterable
    
    Zips this RichIterable with its indices.
    
    Specified by:
    
    zipWithIndex in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    zipWithIndex in interface RichIterable<K>
    
    Specified by:
    
    zipWithIndex in interface UnsortedMapIterable<K,V>
    
    Returns:
    
    A new RichIterable containing pairs consisting of all elements of this RichIterable paired with their index. Indices start at 0.
    
    See Also:
    
    RichIterable.zip(Iterable)
  - groupBy
```
<VV> ImmutableBagMultimap<VV,V> groupBy(Function<? super V,? extends VV> function)
```
    Description copied from interface: RichIterable
    For each element of the iterable, the function is evaluated and the results of these evaluations are collected into a new multimap, where the transformed value is the key and the original values are added to the same (or similar) species of collection as the source iterable.
    Example using a Java 8 method reference:
    Multimap<String, Person> peopleByLastName = people.groupBy(Person::getLastName);
    Specified by:
    
    groupBy in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    groupBy in interface RichIterable<K>
    
    Specified by:
    
    groupBy in interface UnsortedMapIterable<K,V>
  - groupByEach
```
<VV> ImmutableBagMultimap<VV,V> groupByEach(Function<? super V,? extends Iterable<VV>> function)
```
    Description copied from interface: RichIterable
    
    Similar to RichIterable.groupBy(Function), except the result of evaluating function will return a collection of keys for each value.
    
    Specified by:
    
    groupByEach in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    groupByEach in interface RichIterable<K>
    
    Specified by:
    
    groupByEach in interface UnsortedMapIterable<K,V>
  - groupByUniqueKey
```
default <V1> ImmutableMap<V1,V> groupByUniqueKey(Function<? super V,? extends V1> function)
```
    Description copied from interface: RichIterable
    
    For each element of the iterable, the function is evaluated, and the results of these evaluations are collected into a new map, where the transformed value is the key. The generated keys must each be unique, or else an exception is thrown.
    
    Specified by:
    
    groupByUniqueKey in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    groupByUniqueKey in interface RichIterable<K>
    
    Specified by:
    
    groupByUniqueKey in interface UnsortedMapIterable<K,V>
    
    See Also:
    
    RichIterable.groupBy(Function)
  - aggregateInPlaceBy
```
default <KK,VV> ImmutableMap<KK,VV> aggregateInPlaceBy(Function<? super V,? extends KK> groupBy,
                                                                   Function0<? extends VV> zeroValueFactory,
                                                                   Procedure2<? super VV,? super V> mutatingAggregator)
```
    Description copied from interface: RichIterable
    
    Applies an aggregate procedure over the iterable grouping results into a Map based on the specific groupBy function. Aggregate results are required to be mutable as they will be changed in place by the procedure. A second function specifies the initial "zero" aggregate value to work with (i.e. new AtomicInteger(0)).
    
    Specified by:
    
    aggregateInPlaceBy in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    aggregateInPlaceBy in interface RichIterable<K>
  - aggregateBy
```
default <KK,VV> ImmutableMap<KK,VV> aggregateBy(Function<? super V,? extends KK> groupBy,
                                                            Function0<? extends VV> zeroValueFactory,
                                                            Function2<? super VV,? super V,? extends VV> nonMutatingAggregator)
```
    Description copied from interface: RichIterable
    
    Applies an aggregate function over the iterable grouping results into a map based on the specific groupBy function. Aggregate results are allowed to be immutable as they will be replaced in place in the map. A second function specifies the initial "zero" aggregate value to work with (i.e. Integer.valueOf(0)).
    
    Specified by:
    
    aggregateBy in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    aggregateBy in interface RichIterable<K>
  - aggregateBy
```
default <K1,V1,V2> ImmutableMap<K1,V2> aggregateBy(Function<? super K,? extends K1> keyFunction,
                                                                     Function<? super V,? extends V1> valueFunction,
                                                                     Function0<? extends V2> zeroValueFactory,
                                                                     Function2<? super V2,? super V1,? extends V2> nonMutatingAggregator)
```
    Description copied from interface: MapIterable
    Applies an aggregate function over the map grouping results into a map based on the specific key and value groupBy functions. Aggregate results are allowed to be immutable as they will be replaced in place in the map. A second function specifies the initial "zero" aggregate value to work with.
    MapIterable<String, Interval> map = Maps.mutable.with("oneToFive", Interval.fromTo(1, 5), "sixToNine", Interval.fromTo(6, 9)); MapIterable<String, Long> result = map.aggregateBy( eachKey -> { return eachKey.equals("oneToFive") ? "lessThanSix" : "greaterOrEqualsToSix"; }, each -> each.sumOfInt(Integer::intValue), () -> 0L, (argument1, argument2) -> argument1 + argument2); MapIterable<String, Long> expected = Maps.mutable.with("lessThanSix", Interval.fromTo(1, 5).sumOfInt(Integer::intValue), "greaterOrEqualsToSix", Interval.fromTo(6, 9).sumOfInt(Integer::intValue)); Assert.assertEquals(expected, result);
    Specified by:
    
    aggregateBy in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    aggregateBy in interface MapIterable<K,V>
  - flipUniqueValues
```
ImmutableMap<V,K> flipUniqueValues()
```
    Description copied from interface: MapIterable
    Return the MapIterable that is obtained by flipping the direction of this map and making the associations from value to key.
    MapIterable<Integer, String> map = this.newMapWithKeysValues(1, "1", 2, "2", 3, "3"); MapIterable<String, Integer> result = map.flipUniqueValues(); Assert.assertTrue(result.equals(UnifiedMap.newWithKeysValues("1", 1, "2", 2, "3", 3)));
    Specified by:
    
    flipUniqueValues in interface ImmutableMapIterable<K,V>
    
    Specified by:
    
    flipUniqueValues in interface MapIterable<K,V>
    
    Specified by:
    
    flipUniqueValues in interface UnsortedMapIterable<K,V>

Interface ImmutableMap<K,​V>

Method Summary

Methods inherited from interface org.eclipse.collections.api.map.ImmutableMapIterable

Methods inherited from interface org.eclipse.collections.api.InternalIterable

Methods inherited from interface java.lang.Iterable

Methods inherited from interface org.eclipse.collections.api.map.MapIterable

Methods inherited from interface org.eclipse.collections.api.RichIterable

Methods inherited from interface org.eclipse.collections.api.map.UnsortedMapIterable

Method Detail

newWithKeyValue

newWithAllKeyValues

newWithMap

newWithMapIterable

newWithAllKeyValueArguments

newWithoutKey

newWithoutAllKeys

toMap

flip

select

reject

tap

select

selectWith

reject

rejectWith

partition

partitionWith

selectInstancesOf

collect

collectValues

collect

collectWith

collectBoolean

collectByte

collectChar

collectDouble

collectFloat

collectInt

collectLong

collectShort

collectIf

flatCollect

flatCollectWith

zip

zipWithIndex

groupBy

groupByEach

groupByUniqueKey

aggregateInPlaceBy

aggregateBy

aggregateBy

flipUniqueValues

Interface ImmutableMap<K,V>