getOrDefault
getOrDefault(Object key, V defaultValue)If there are key returns the corresponding value, otherwise defaultValue
replaceAll
replaceAll(BiFunction<? super K, ? super V, ? extends V> function)Key is to replace all of the dimensions of value, replacement logic function implemented in the
putIfAbsent
putIfAbsent(K key, V value)If there is a corresponding key value is returned, otherwise the key and value added to the map
computeIfAbsent
computeIfAbsent(K key,Function<? super K, ? extends V> mappingFunction)If key returns a corresponding value exists, if it does not exist and the value calculated by the function into the map
computeIfPresent
computeIfPresent(K key,BiFunction<? super K, ? super V, ? extends V> remappingFunction)If a key is present is calculated in accordance with the new value and the new value into the function map, if the new value is null to remove the map from the key.
compute
compute(K key,BiFunction<? super K, ? super V, ? extends V> remappingFunction)By calculating function key corresponding newValue, newValue not empty into the map, the key is removed or in the case of the presence of key.
merge
merge(K key, V value,BiFunction<? super V, ? super V, ? extends V> remappingFunction)Based on the corresponding key value and calculate a new oldValue newValue by function, newValue not empty into the map, otherwise the key is removed from the map.