Multimap
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The document discusses Google Guava's Multimap interface and its implementations. Multimap allows keys to map to multiple values, unlike regular Maps which only allow one-to-one mappings. It describes the Multimap interface hierarchy and common implementations like ArrayListMultimap, HashMultimap, and TreeMultimap. It also compares Guava Multimap behaviors to standard JDK collections.
Multimap
- 2. Map vs Multimap Guava Multimap
- 5. Interface hierarchy Interface Multimap <K,V>
- 6. Implementations of ListMultimap Interface ListMultimap <K,V> Class ArrayListMultimap <K,V> Class LinkedListMultimap <K,V> Class ForwardingListMultimap <K,V> Class ImmutableListMultimap <K,V>
- 7. Implementations of SetMultimap Interface SetMultimap <K,V> Class HashMultimap<K,V> Class LinkedHashMultimap<K,V> Class ImmutableSetMultimap<K,V> Class ForwardingSetMultimap<K,V>
- 8. Implementations of SortedSetMultiMap Interface SortedSetMultimap<K,V> Class ForwardingSortedSetMultimap<K,V> Class TreeMultimap<K,V>
- 9. Compare to JDK Collections Guava Implementation Keys behave like Values behave like ArrayListMultiMap HashMap ArrayList HashMultiMap HashMap HashSet LinkedListMultiMap LinkedHashMap LinkedList LinkedHashMultiMap LinkedHashMap LinkedHashSet TreeMultiMap TreeMap TreeSet ImmutableListMultiMap ImmutableMap ImmutableList ImmutableSetMultiMap ImmutableMap ImmutableSet