Package org.agrona.collections

Class Int2IntHashMap.KeySet

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractSet<Integer>

org.agrona.collections.Int2IntHashMap.KeySet

All Implemented Interfaces:

Iterable<Integer>, Collection<Integer>, Set<Integer>

Enclosing class:

Int2IntHashMap

public final class Int2IntHashMap.KeySet
extends AbstractSet<Integer>

Set of keys which supports optional cached iterators to avoid allocation.

Constructor Summary

Constructors

Constructor	Description
KeySet()	Create a new instance.

Method Summary

Modifier and Type	Method	Description
void	clear()
boolean	contains(int key)	Checks if key is contained in the map without boxing.
boolean	contains(Object o)
boolean	isEmpty()
Int2IntHashMap.KeyIterator	iterator()
boolean	removeIfInt(IntPredicate filter)	Removes all the elements of this collection that satisfy the given predicate.
int	size()

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

add, addAll, containsAll, remove, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface java.util.Set

add, addAll, containsAll, remove, retainAll, spliterator, toArray, toArray

Constructor Details

KeySet

public KeySet()

Create a new instance.

Method Details

iterator

public Int2IntHashMap.KeyIterator iterator()

Specified by:

iterator in interface Collection<Integer>

Specified by:

iterator in interface Iterable<Integer>

Specified by:

iterator in interface Set<Integer>

Specified by:

iterator in class AbstractCollection<Integer>

size

public int size()

Specified by:

size in interface Collection<Integer>

Specified by:

size in interface Set<Integer>

Specified by:

size in class AbstractCollection<Integer>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<Integer>

Specified by:

isEmpty in interface Set<Integer>

Overrides:

isEmpty in class AbstractCollection<Integer>

clear

public void clear()

Specified by:

clear in interface Collection<Integer>

Specified by:

clear in interface Set<Integer>

Overrides:

clear in class AbstractCollection<Integer>

contains

public boolean contains(Object o)

Specified by:

contains in interface Collection<Integer>

Specified by:

contains in interface Set<Integer>

Overrides:

contains in class AbstractCollection<Integer>

contains

public boolean contains(int key)

Checks if key is contained in the map without boxing.

Parameters:

key - to check.

Returns:

true if key is contained in this map.

removeIfInt

public boolean removeIfInt(IntPredicate filter)

Removes all the elements of this collection that satisfy the given predicate.

NB: Renamed from removeIf to avoid overloading on parameter types of lambda expression, which doesn't play well with type inference in lambda expressions.

Parameters:

filter - a predicate to apply.

Returns:

true if at least one key was removed.