public abstract static class DoubleCollections.EmptyCollection extends AbstractDoubleCollection
This class may be useful to implement your own in case you subclass a type-specific collection.
Modifier and Type | Method and Description |
---|---|
boolean |
add(double k) |
boolean |
addAll(DoubleCollection c)
Adds all elements of the given type-specific collection to this collection.
|
void |
clear() |
boolean |
contains(double k) |
boolean |
containsAll(DoubleCollection c)
Checks whether this collection contains all elements from the given type-specific collection.
|
boolean |
equals(Object o) |
int |
hashCode() |
DoubleBidirectionalIterator |
iterator()
Returns a type-specific iterator on the elements of this collection.
|
boolean |
rem(double k)
|
boolean |
removeAll(DoubleCollection c)
Remove from this collection all elements in the given type-specific collection.
|
boolean |
retainAll(DoubleCollection c)
Retains in this collection only elements from the given type-specific collection.
|
int |
size() |
Object[] |
toArray() |
double[] |
toDoubleArray()
Returns a primitive type array containing the items of this collection.
|
double[] |
toDoubleArray(double[] a)
Returns a primitive type array containing the items of this collection.
|
add, addAll, contains, containsAll, doubleIterator, isEmpty, rem, remove, removeAll, retainAll, toArray, toArray, toString
public boolean add(double k)
add
in interface DoubleCollection
add
in class AbstractDoubleCollection
Collection.add(Object)
public boolean contains(double k)
contains
in interface DoubleCollection
contains
in class AbstractDoubleCollection
Collection.contains(Object)
public Object[] toArray()
toArray
in interface Collection<Double>
toArray
in class AbstractDoubleCollection
public double[] toDoubleArray(double[] a)
DoubleCollection
Note that, contrarily to Collection.toArray(Object[])
, this
methods just writes all elements of this collection: no special
value will be added after the last one.
toDoubleArray
in interface DoubleCollection
toDoubleArray
in class AbstractDoubleCollection
a
- if this array is big enough, it will be used to store this collection.Collection.toArray(Object[])
public double[] toDoubleArray()
DoubleCollection
toDoubleArray
in interface DoubleCollection
toDoubleArray
in class AbstractDoubleCollection
Collection.toArray()
public boolean rem(double k)
DoubleCollection
remove()
, but the clash
with the similarly named index-based method in the List
interface
forces us to use a distinguished name. For simplicity, the set interfaces reinstates
remove()
.rem
in interface DoubleCollection
rem
in class AbstractDoubleCollection
Collection.remove(Object)
public boolean addAll(DoubleCollection c)
AbstractDoubleCollection
addAll
in interface DoubleCollection
addAll
in class AbstractDoubleCollection
c
- a type-specific collection.true
if this collection changed as a result of the call.Collection.addAll(Collection)
public boolean removeAll(DoubleCollection c)
AbstractDoubleCollection
removeAll
in interface DoubleCollection
removeAll
in class AbstractDoubleCollection
c
- a type-specific collection.true
if this collection changed as a result of the call.Collection.removeAll(Collection)
public boolean retainAll(DoubleCollection c)
AbstractDoubleCollection
retainAll
in interface DoubleCollection
retainAll
in class AbstractDoubleCollection
c
- a type-specific collection.true
if this collection changed as a result of the call.Collection.retainAll(Collection)
public boolean containsAll(DoubleCollection c)
AbstractDoubleCollection
containsAll
in interface DoubleCollection
containsAll
in class AbstractDoubleCollection
c
- a type-specific collection.true
if this collection contains all elements of the argument.Collection.containsAll(Collection)
public DoubleBidirectionalIterator iterator()
DoubleCollection
Note that this specification strengthens the one given in
Iterable.iterator()
, which was already
strengthened in the corresponding type-specific class,
but was weakened by the fact that this interface extends Collection
.
iterator
in interface DoubleCollection
iterator
in interface DoubleIterable
iterator
in interface Iterable<Double>
iterator
in interface Collection<Double>
iterator
in class AbstractDoubleCollection
public int size()
size
in interface Collection<Double>
size
in class AbstractCollection<Double>
public void clear()
clear
in interface Collection<Double>
clear
in class AbstractCollection<Double>
public int hashCode()
hashCode
in interface Collection<Double>
hashCode
in class Object