Class Long2LongHashMap.KeySet

  • All Implemented Interfaces:
    java.lang.Iterable<java.lang.Long>, java.util.Collection<java.lang.Long>, java.util.Set<java.lang.Long>
    Enclosing class:
    Long2LongHashMap

    public final class Long2LongHashMap.KeySet
    extends java.util.AbstractSet<java.lang.Long>
    Set of keys which supports optional cached iterators to avoid allocation.
    • Constructor Summary

      Constructors 
      Constructor Description
      KeySet()  
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void clear()
      boolean contains​(long key)
      Checks if key is contained in the map without boxing.
      boolean contains​(java.lang.Object o)
      boolean isEmpty()
      Long2LongHashMap.KeyIterator iterator()
      boolean removeIfLong​(java.util.function.LongPredicate 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 Detail

      • KeySet

        public KeySet()
    • Method Detail

      • iterator

        public Long2LongHashMap.KeyIterator iterator()
        Specified by:
        iterator in interface java.util.Collection<java.lang.Long>
        Specified by:
        iterator in interface java.lang.Iterable<java.lang.Long>
        Specified by:
        iterator in interface java.util.Set<java.lang.Long>
        Specified by:
        iterator in class java.util.AbstractCollection<java.lang.Long>
      • size

        public int size()
        Specified by:
        size in interface java.util.Collection<java.lang.Long>
        Specified by:
        size in interface java.util.Set<java.lang.Long>
        Specified by:
        size in class java.util.AbstractCollection<java.lang.Long>
      • isEmpty

        public boolean isEmpty()
        Specified by:
        isEmpty in interface java.util.Collection<java.lang.Long>
        Specified by:
        isEmpty in interface java.util.Set<java.lang.Long>
        Overrides:
        isEmpty in class java.util.AbstractCollection<java.lang.Long>
      • clear

        public void clear()
        Specified by:
        clear in interface java.util.Collection<java.lang.Long>
        Specified by:
        clear in interface java.util.Set<java.lang.Long>
        Overrides:
        clear in class java.util.AbstractCollection<java.lang.Long>
      • contains

        public boolean contains​(java.lang.Object o)
        Specified by:
        contains in interface java.util.Collection<java.lang.Long>
        Specified by:
        contains in interface java.util.Set<java.lang.Long>
        Overrides:
        contains in class java.util.AbstractCollection<java.lang.Long>
      • contains

        public boolean contains​(long key)
        Checks if key is contained in the map without boxing.
        Parameters:
        key - to check.
        Returns:
        true if key is contained in this map.
      • removeIfLong

        public boolean removeIfLong​(java.util.function.LongPredicate 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.