Package it.unimi.dsi.fastutil.ints

Class IntArraySet

java.lang.Object
java.util.AbstractCollection<Integer>
it.unimi.dsi.fastutil.ints.AbstractIntCollection
it.unimi.dsi.fastutil.ints.AbstractIntSet
it.unimi.dsi.fastutil.ints.IntArraySet
All Implemented Interfaces:
IntCollection, IntIterable, IntSet, Serializable, Cloneable, Iterable<Integer>, Collection<Integer>, Set<Integer>
public class IntArraySet extends AbstractIntSet implements Serializable, Cloneable
A simple, brute-force implementation of a set based on a backing array.

The main purpose of this implementation is that of wrapping cleanly the brute-force approach to the storage of a very small number of items: just put them into an array and scan linearly to find an item.

See Also:

  • Constructor Details

    • IntArraySet

      public IntArraySet(int[] a)
      Creates a new array set using the given backing array. The resulting set will have as many elements as the array.

      It is the responsibility of the caller to ensure that the elements of a are distinct.

      Parameters:
      a - the backing array.

    • IntArraySet

      public IntArraySet()
      Creates a new empty array set.

    • IntArraySet

      public IntArraySet(int capacity)
      Creates a new empty array set of given initial capacity.
      Parameters:
      capacity - the initial capacity.

    • IntArraySet

      public IntArraySet(IntCollection c)
      Creates a new array set copying the contents of a given collection.
      Parameters:
      c - a collection.

    • IntArraySet

      public IntArraySet(Collection<? extends Integer> c)
      Creates a new array set copying the contents of a given set.
      Parameters:
      c - a collection.

    • IntArraySet

      public IntArraySet(IntSet c)
      Creates a new array set copying the contents of a given collection.
      Parameters:
      c - a collection.

    • IntArraySet

      public IntArraySet(Set<? extends Integer> c)
      Creates a new array set copying the contents of a given set.
      Parameters:
      c - a collection.

    • IntArraySet

      public IntArraySet(int[] a, int size)
      Creates a new array set using the given backing array and the given number of elements of the array.

      It is the responsibility of the caller to ensure that the first size elements of a are distinct.

      Parameters:
      a - the backing array.
      size - the number of valid elements in a.

  • Method Details