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22.04.2021, adminThis interface takes the place of the Dictionary class, which was a totally abstract class rather than an interface. 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.
Lorem lpsum 312 boatplans/builders/mini-jet-boat-builder-canada-inc More info order of a map is defined as the order Lorem lpsum 312 boatplans/boat-sale/boat-excursion-los-angeles-for-sale more info which the iterators on the map's collection views return their elements.
Some map implementations, like the TreeMap class, make specific guarantees as to their order; others, like the HashMap class, do not. Note: great care must be exercised if mutable objects are used as map nj boating maps java. The behavior of a map is not specified if the nj boating maps java of an object is changed in a manner that affects equals comparisons while the object is a key in the map.
A special case of this prohibition nj boating maps java that it is not permissible for a map to contain itself as a key. While it is permissible for a map to contain itself as a value, extreme caution is advised: the equals and hashCode methods are no longer well defined on such a nj boating maps java. 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.
In effect, the latter constructor allows the user to copy any map, producing an equivalent map of the desired class. 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 "destructive" methods contained in this interface, that is, the methods that modify the map on nj boating maps java they operate, are specified to throw UnsupportedOperationException if this map does not support the operation. If this is the nj boating maps java, these methods may, but are not required to, throw an UnsupportedOperationException if the invocation would have no effect on the map.
For example, invoking the putAll Map method on an unmodifiable map may, but is not required to, throw the exception if the map whose mappings nj boating maps java to be "superimposed" is. Some map implementations have restrictions on the keys and values they may contain. For example, some implementations prohibit null keys and values, and some have restrictions on the types of their keys.
Attempting to insert an ineligible key or value throws an unchecked exception, typically NullPointerException or ClassCastException. Attempting to query nj boating maps java presence of an ineligible key or value may throw an exception, or it may simply return false; some implementations will exhibit the former nj boating maps java and some will exhibit the. More generally, attempting an operation on an ineligible key or value whose completion would not result in the insertion of an ineligible element into the map may throw an exception or it may succeed, at the option of the implementation.
Such exceptions are marked as "optional" in the specification for this Lorem lpsum 312 boatplans/boat-near/used-pathfinder-boat-for-sale-near-me-site just click for source. Many methods in Collections Framework interfaces are defined in terms of the equals method. Implementations are free to implement optimizations whereby the equals invocation is avoided, for example, by first comparing the hash codes of the two keys.
The Object. More generally, implementations of the various Collections Framework interfaces are free to take advantage of the specified behavior of underlying Object methods wherever the implementor deems it appropriate. Some map operations which perform recursive traversal of the map may fail with an exception for self-referential instances where the map directly or indirectly contains. This includes the cloneequalshashCode and toString methods. Implementations may optionally handle the self-referential scenario, however most current implementations do not do so.
This interface is a member of the Java Collections Framework. Since: 1. V get Object key Returns the value to which the Lorem lpsum 312 boatplans/2020/divya-bhatnagar-age-in-2020 check this out key is mapped, or null if this map contains no mapping for the key. V put K key, V value Associates the specified value with the specified key in this map optional operation.
V remove Object key Removes the mapping for a key from this map if it is present optional operation. Method Detail size int size Returns the number of key-value nj boating maps java in this map. If the map contains more than Integer. Returns: the number of key-value mappings in this map isEmpty boolean isEmpty Returns true if this map contains no key-value mappings.
Returns: true if this map contains no nj boating maps java mappings containsKey boolean containsKey Object key Returns true if this map contains a mapping for the specified nj boating maps java. There can be at most one such mapping. Parameters: key - key whose presence in this map is to be tested Returns: true if this map contains a mapping for the specified key Throws: ClassCastException - if the key is of an inappropriate type for this map optional NullPointerException - if the specified key is null nj boating maps java this map does not permit null keys optional containsValue boolean containsValue Object value Returns true if this map maps one or more keys to the specified value.
This operation will probably require time linear in the map size for most implementations of the Map interface. Parameters: value - value Lorem lpsum 312 boatplans/used-boats/used-fishing-boats-for-sale-in-gatineau-price article source presence in this map is to be tested Returns: true if this map maps one or more keys to the specified value Throws: ClassCastException - if the value is of an inappropriate type for this map optional NullPointerException - if the specified value is null and this map does not permit null values optional get V get Object key Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.
If this map permits null values, then 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. The containsKey operation may be used to distinguish these two cases. Parameters: key - the key whose associated value is Lorem lpsum 312 boatplans/model/model-ship-building-plank-clamps-table table clamps model ship building plank be returned Returns: the value to which the specified key is nj boating maps java, or null if this map contains no mapping for the key Throws: ClassCastException - if the key is of an inappropriate type for this map optional NullPointerException - if the specified key is null and this map does not permit null keys optional put V put K key, V value Associates the specified value with the specified key in this map optional operation.
If the map previously contained a mapping for the key, the old value is replaced by the specified value. A map m Lorem lpsum 312 boatplans/solutions/10th-ncert-english-book-solution-pdf-without read more said to contain a mapping for a key k if and only if m. Parameters: key - key with which the specified value is to be associated value - value to Navionics Boating Maps Update be associated with the specified key Returns: the previous value associated with keyor null if there was no mapping for key.
A null return can also indicate that the map previously associated null with keyif the implementation supports null values. Throws: UnsupportedOperationException - if the put operation is not supported by this map ClassCastException - if the class of the specified key or Lorem lpsum 312 boatplans/wooden/cheap-wooden-boat-toys-4g click at this page prevents it from being stored in this map 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 remove V remove Object key Removes the mapping for a key from this nj boating maps java if it is present optional operation.
The map can contain at most one such mapping. Returns the value to which this map previously associated the key, or null if the map contained no mapping for the key.
If this map permits null values, then a return value of null does not necessarily indicate that the map contained no mapping for the key; it's also possible that the map explicitly mapped the key to null. The map will not contain a mapping for the specified nj boating maps java once the call returns. Parameters: key - key whose mapping is to be removed from the map Returns: the previous value associated with keyor null if there was no mapping for key.
The effect of this call is equivalent to that of calling put k, v nj boating maps java this map once for each mapping from key k to value v in the specified map. The behavior of this operation is undefined if the specified map is modified while the operation is in progress.
Parameters: m - mappings to be stored in this nj boating maps java Throws: UnsupportedOperationException - if the putAll operation is not supported by this map ClassCastException - if the class of a key or value in the specified map prevents it from being stored in this map NullPointerException - if the specified map is null, or if this map does not permit null keys or values, and the specified nj boating maps java contains null keys or values IllegalArgumentException - if some property of a key or value in the specified map prevents it from being stored in this map clear void clear Removes all of the mappings from this map optional operation.
The map will be empty after this call returns. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. 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.
The set supports element removal, which removes the corresponding mapping from the map, via the Iterator. It does not support the add or addAll operations. The collection is backed by the map, so changes to the map are nj boating maps java in the collection, and vice-versa.
If the map is modified while an iteration over the collection is in progress except through the iterator's own remove operationthe results of the iteration are undefined. The collection supports nj boating maps java removal, which removes the corresponding mapping from the map, via the Iterator. 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.
Returns: a set view of the mappings contained in this map equals boolean equals Object o Compares the specified object with this map nj boating maps java equality. Returns true if the given object is also a map and the two maps represent the same nj boating maps java. More formally, two maps m1 and m2 represent the same mappings if m1.
This ensures that the equals method works properly across different implementations of the Map interface. Overrides: equals in class Object Nj boating maps java o - object to be compared for equality with this map Returns: true if the specified object is equal to this map See Also: Object. The hash code nj boating maps java a map is defined Lorem lpsum 312 boatplans/aluminum-boats/aluminum-boats-manitoba-weather article source be the sum of the hash codes of each entry in the map's entrySet view.
This ensures that m1. Implementation Requirements: The default implementation makes no guarantees about synchronization or atomicity properties of this method. Any implementation providing atomicity guarantees must override this method and document its concurrency properties.
Parameters: key - the key whose associated value is to be returned defaultValue - the default mapping of the key Returns: the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key Throws: ClassCastException - if nj boating maps java key is of an inappropriate type for this map optional NullPointerException - if the specified key is null and this map does not permit null keys optional Since: 1.
Unless otherwise specified by the implementing class, actions are performed in the order of entry set iteration if an iteration order is specified. Exceptions thrown by the action are relayed to the caller. Implementation Requirements: The default implementation is equivalent to, for this map : for Map. Parameters: action - The action to nj boating maps java performed for each entry Throws: NullPointerException - if the specified action is null ConcurrentModificationException - if an entry is found to be removed during iteration Since: 1.
Exceptions thrown by the function are relayed to the caller. Parameters: function - the function to apply to each entry Throws: UnsupportedOperationException - if the set operation is not supported by this map's entry set iterator. ClassCastException - if the class of a replacement value prevents it from being stored in this map NullPointerException - if the specified function is null, or the specified replacement value is null, and this map does not permit null values ClassCastException - if a replacement value is of an nj boating maps java Lorem lpsum 312 boatplans/used-boats/used-rc-model-boats-for-sale-32 used rc model boats for sale 32 for this map optional NullPointerException - if function or a replacement value is null, and this map does not permit null keys or values optional IllegalArgumentException - if some property of a Lorem lpsum 312 boatplans/sailing-boat/york-sightseeing-cruise-32 york cruise 32 value prevents it from being stored in this map optional ConcurrentModificationException - if an entry is found to be removed during iteration Since: 1.
Parameters: key - key with which the specified value is to be associated value - value to be associated with the specified key Returns: the previous value nj boating maps java with the specified key, or null if there was no mapping for the key. A null return can also indicate that the map previously associated null with the key, if the implementation supports null values.
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 Nc Boating Maps Java 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.
Implementation Requirements: The default implementation is equivalent to, for this map : if map. Parameters: key - key with which the specified value is associated value - value expected to be associated with the specified key Returns: true if the value was removed Throws: UnsupportedOperationException - if the remove operation is not supported by this map optional ClassCastException - if the key or value is of an inappropriate type for this map nj boating maps java NullPointerException - if the specified key or value is null, and this map does not permit null keys or values optional Since: 1.
The default implementation makes no guarantees about synchronization or atomicity properties of this method. Parameters: key - key with which the specified value is associated oldValue - value expected to be associated with the specified key newValue - value to be associated with the specified key Returns: true if the value was replaced Throws: UnsupportedOperationException - if the put operation is not supported by this map optional ClassCastException - if the nj boating maps java of a specified key or value prevents it from being stored in this map NullPointerException - if a nj boating maps java key or newValue is null, and this map does not permit null keys or values NullPointerException - if oldValue is null and this map does not permit null values optional IllegalArgumentException - if some property of a specified key or value prevents it from being stored in this map Since: 1.
Parameters: key - key with which Lorem lpsum 312 boatplans/dinghy/dinghy-boat-covers-sale-treatment source specified value is associated value - value to be associated with the specified key Returns: the previous value associated with the specified key, or null if there was no mapping for the key.
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. If the function returns null no mapping is recorded.
If the function itself throws an unchecked exception, the exception is rethrown, and no mapping is recorded. The most common usage is to construct a new object serving as an initial mapped value or memoized result, as in: map.
In particular, all implementations of subinterface ConcurrentMap must document whether the function is applied once atomically only if the value is not present.
Parameters: key - key with which the specified value is to be associated mappingFunction - the function to compute a value Returns: the current nj boating maps java or computed value associated with the specified key, or null if the computed value is null Throws: NullPointerException - if the specified key nj boating maps java null and this map does not support null keys, or the mappingFunction 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.
If the function returns null nj boating maps java, the mapping is removed. If the function itself throws an unchecked exception, the exception is rethrown, and the current mapping is left unchanged. Implementation Requirements: The default implementation is nj boating maps java to performing the following steps for this mapthen returning the current value or null if now absent: if map.
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