Klasse UnmodifiableListAdapter<E>
- Alle implementierten Schnittstellen:
UnmodifiableCollection<E>,UnmodifiableList<E>,Iterable<E>
- Autor:
- Mirko Klemm 2015-03-15
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Konstruktorübersicht
Konstruktoren -
Methodenübersicht
Modifizierer und TypMethodeBeschreibungbooleanReturns true if this collection contains the specified element.booleancontainsAll(Collection<?> c) Returns true if this collection contains all of the elements in the specified collection.get(int index) Returns the element at the specified position in this list.intReturns the index of the first occurrence of the specified element in this list, or -1 if this list does not contain the element.booleanisEmpty()Returns true if this collection contains no elements.iterator()Returns an iterator over the elements in this collection.intReturns the index of the last occurrence of the specified element in this list, or -1 if this list does not contain the element.intsize()Returns the number of elements in this collection.subList(int fromIndex, int toIndex) Returns a view of the portion of this list between the specified fromIndex, inclusive, and toIndex, exclusive.Object[]toArray()Returns an array containing all of the elements in this collection.<T> T[]toArray(T[] a) Returns an array containing all of the elements in this collection; the runtime type of the returned array is that of the specified array.toList()Von Klasse geerbte Methoden java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitVon Schnittstelle geerbte Methoden java.lang.Iterable
forEach, spliterator
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Konstruktordetails
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UnmodifiableListAdapter
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Methodendetails
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get
Beschreibung aus Schnittstelle kopiert:UnmodifiableListReturns the element at the specified position in this list.- Angegeben von:
getin SchnittstelleUnmodifiableList<E>- Parameter:
index- index of the element to return- Gibt zurück:
- the element at the specified position in this list
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indexOf
Beschreibung aus Schnittstelle kopiert:UnmodifiableListReturns the index of the first occurrence of the specified element in this list, or -1 if this list does not contain the element. More formally, returns the lowest index i such that (o==null ? get(i)==null : o.equals(get(i))), or -1 if there is no such index.- Angegeben von:
indexOfin SchnittstelleUnmodifiableList<E>- Parameter:
o- element to search for- Gibt zurück:
- the index of the first occurrence of the specified element in this list, or -1 if this list does not contain the element
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lastIndexOf
Beschreibung aus Schnittstelle kopiert:UnmodifiableListReturns the index of the last occurrence of the specified element in this list, or -1 if this list does not contain the element. More formally, returns the highest index i such that (o==null ? get(i)==null : o.equals(get(i))), or -1 if there is no such index.- Angegeben von:
lastIndexOfin SchnittstelleUnmodifiableList<E>- Parameter:
o- element to search for- Gibt zurück:
- the index of the last occurrence of the specified element in this list, or -1 if this list does not contain the element
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subList
Beschreibung aus Schnittstelle kopiert:UnmodifiableListReturns a view of the portion of this list between the specified fromIndex, inclusive, and toIndex, exclusive. (If fromIndex and toIndex are equal, the returned list is empty.) The returned list is backed by this list, so non-structural changes in the returned list are reflected in this list, and vice-versa. The returned list supports all of the optional list operations supported by this list.
This method eliminates the need for explicit range operations (of the sort that commonly exist for arrays). Any operation that expects a list can be used as a range operation by passing a subList view instead of a whole list. For example, the following idiom removes a range of elements from a list:list.subList(from, to).clear();Similar idioms may be constructed for indexOf and lastIndexOf, and all of the algorithms in the Collections class can be applied to a subList.
The semantics of the list returned by this method become undefined if the backing list (i.e., this list) is structurally modified in any way other than via the returned list. (Structural modifications are those that change the size of this list, or otherwise perturb it in such a fashion that iterations in progress may yield incorrect results.)- Angegeben von:
subListin SchnittstelleUnmodifiableList<E>- Parameter:
fromIndex- low endpoint (inclusive) of the subListtoIndex- high endpoint (exclusive) of the subList- Gibt zurück:
- a view of the specified range within this list
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size
public int size()Beschreibung aus Schnittstelle kopiert:UnmodifiableCollectionReturns the number of elements in this collection. If this collection contains more than Integer.MAX_VALUE elements, returns Integer.MAX_VALUE.- Angegeben von:
sizein SchnittstelleUnmodifiableCollection<E>- Gibt zurück:
- the number of elements in this collection
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isEmpty
public boolean isEmpty()Beschreibung aus Schnittstelle kopiert:UnmodifiableCollectionReturns true if this collection contains no elements.- Angegeben von:
isEmptyin SchnittstelleUnmodifiableCollection<E>- Gibt zurück:
- true if this collection contains no elements
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contains
Beschreibung aus Schnittstelle kopiert:UnmodifiableCollectionReturns true if this collection contains the specified element. More formally, returns true if and only if this collection contains at least one element e such that (o==null ? e==null : o.equals(e)).- Angegeben von:
containsin SchnittstelleUnmodifiableCollection<E>- Parameter:
o- element whose presence in this collection is to be tested- Gibt zurück:
- true if this collection contains the specified element
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iterator
Beschreibung aus Schnittstelle kopiert:UnmodifiableCollectionReturns an iterator over the elements in this collection. There are no guarantees concerning the order in which the elements are returned (unless this collection is an instance of some class that provides a guarantee). -
toArray
Beschreibung aus Schnittstelle kopiert:UnmodifiableCollectionReturns an array containing all of the elements in this collection. If this collection makes any guarantees as to what order its elements are returned by its iterator, this method must return the elements in the same order.The returned array will be "safe" in that no references to it are maintained by this collection. (In other words, this method must allocate a new array even if this collection is backed by an array). The caller is thus free to modify the returned array.
This method acts as bridge between array-based and collection-based APIs.
- Angegeben von:
toArrayin SchnittstelleUnmodifiableCollection<E>- Gibt zurück:
- an array containing all of the elements in this collection
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toArray
public <T> T[] toArray(T[] a) Beschreibung aus Schnittstelle kopiert:UnmodifiableCollectionReturns an array containing all of the elements in this collection; the runtime type of the returned array is that of the specified array. If the collection fits in the specified array, it is returned therein. Otherwise, a new array is allocated with the runtime type of the specified array and the size of this collection.If this collection fits in the specified array with room to spare (i.e., the array has more elements than this collection), the element in the array immediately following the end of the collection is set to null. (This is useful in determining the length of this collection only if the caller knows that this collection does not contain any null elements.)
If this collection makes any guarantees as to what order its elements are returned by its iterator, this method must return the elements in the same order.
Like the
UnmodifiableCollection.toArray()method, this method acts as bridge between array-based and collection-based APIs. Further, this method allows precise control over the runtime type of the output array, and may, under certain circumstances, be used to save allocation costs.Suppose x is a collection known to contain only strings. The following code can be used to dump the collection into a newly allocated array of String:
String[] y = x.toArray(new String[0]);Note that toArray(new Object[0]) is identical in function to toArray().- Angegeben von:
toArrayin SchnittstelleUnmodifiableCollection<E>- Parameter:
a- the array into which the elements of this collection are to be stored, if it is big enough; otherwise, a new array of the same runtime type is allocated for this purpose.- Gibt zurück:
- an array containing all of the elements in this collection
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containsAll
Beschreibung aus Schnittstelle kopiert:UnmodifiableCollectionReturns true if this collection contains all of the elements in the specified collection.- Angegeben von:
containsAllin SchnittstelleUnmodifiableCollection<E>- Parameter:
c- collection to be checked for containment in this collection- Gibt zurück:
- true if this collection contains all of the elements in the specified collection
- Siehe auch:
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toList
- Angegeben von:
toListin SchnittstelleUnmodifiableList<E>
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