Maps in java api docs

images maps in java api docs

Implementation Requirements: The default implementation makes no guarantees about synchronization or atomicity properties of this method. A return value of null does not necessarily indicate that the map contains no mapping for the key; it's also possible that the map explicitly maps the key to null. Use is subject to license terms. In effect, the latter constructor allows the user to copy any map, producing an equivalent map of the desired class. A null return can also indicate that the map previously associated null with the key, if the implementation supports null values. Implementations may optionally handle the self-referential scenario, however most current implementations do not do so. Non-concurrent implementations should override this method and, on a best-effort basis, throw a ConcurrentModificationException if it is detected that the mapping function modifies this map during computation.

  • Google Maps Platform Google Developers
  • Generated Documentation (Untitled)
  • Map (Java Platform SE 7 )
  • HashMap (Java Platform SE 8 )
  • Map (Java SE 9 & JDK 9 )

  • Google Maps Platform Google Developers

    Type Parameters: K - the type of keys maintained by this map: V - the type of mapped . providing atomicity guarantees must override this method and document its . For further API reference and developer documentation, see Java SE.

    images maps in java api docs

    Type Parameters: K - the type of keys maintained by this map: V - the type of mapped . For further API reference and developer documentation, see Java SE.

    Generated Documentation (Untitled)

    Type Parameters: K - the type of keys maintained by this map: V - the type of mapped values Nested classes/interfaces inherited from interface . For further API reference and developer documentation, see Java SE Documentation.
    The Object. If the function returns null no mapping is recorded. Throws: UnsupportedOperationException - if the put operation is not supported by this map optional ClassCastException - if the key or value is of an inappropriate type for this map optional NullPointerException - if the specified key or value is null, and this map does not permit null keys or values optional IllegalArgumentException - if some property of the specified key or value prevents it from being stored in this map optional Since: 1.

    Video: Maps in java api docs What is an API?

    Returns a Set view of the mappings contained in this map. Parameters: key - key with which the specified value is to be associated remappingFunction - the function to compute a value Returns: the new value associated with the specified key, or null if none Throws: NullPointerException - if the specified key is null and this map does not support null keys, or the remappingFunction is null UnsupportedOperationException - if the put operation is not supported by this map optional ClassCastException - if the class of the specified key or value prevents it from being stored in this map optional Since: 1.

    images maps in java api docs
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    The Map interface provides three collection viewswhich allow a map's contents to be viewed as a set of keys, collection of values, or set of key-value mappings. Attempting to query the presence of an ineligible key or value may throw an exception, or it may simply return false; some implementations will exhibit the former behavior and some will exhibit the latter.

    Map (Java Platform SE 7 )

    The Map instances created by these methods have the following characteristics: They are structurally immutable. If the map is modified while an iteration over the set is in progress except through the iterator's own remove operation, or through the setValue operation on a map entry returned by the iterator the results of the iteration are undefined. Throws: UnsupportedOperationException - if the put operation is not supported by this map optional ClassCastException - if the class of the specified key or value prevents it from being stored in this map optional NullPointerException - if the specified key or value is null, and this map does not permit null keys or values IllegalArgumentException - if some property of the specified key or value prevents it from being stored in this map Since: 1.

    A map cannot contain duplicate keys; each key can map to at most one value.

    constructors) but all of the general-purpose map implementations in the JDK comply. Therefore, identity-sensitive operations on these instances (reference. Industry solutions. Contact us for documentation for our custom industry solutions : gaming, ridesharing, and asset tracking.

    HashMap (Java Platform SE 8 )

    Contact sales. Java HashMap. You learned from the previous chapter, that Arrays store items as an ordered collection, and you have to access them with an index number (int.
    If the specified key is not already associated with a value or is mapped to null associates it with the given value and returns nullelse returns the current value.

    If the function returns null no mapping is recorded.

    Video: Maps in java api docs Using the JAVA API Online Documentation

    If the map is modified while an iteration over the set is in progress except through the iterator's own remove operationthe results of the iteration are undefined. There is no way to enforce this recommendation as interfaces cannot contain constructors but all of the general-purpose map implementations in the JDK comply. The containsKey operation may be used to distinguish these two cases. Note: Since 0.

    images maps in java api docs

    images maps in java api docs
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    All general-purpose map implementation classes should provide two "standard" constructors: a void no arguments constructor which creates an empty map, and a constructor with a single argument of type Mapwhich creates a new map with the same key-value mappings as its argument.

    Returns the value to which this map previously associated the key, or null if the map contained no mapping for the key.

    Map (Java SE 9 & JDK 9 )

    Copies all of the mappings from the specified map to this map. Returns an immutable map containing a single mapping. They disallow null keys and values.