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SortedSet


java.util

Interface SortedSet<E>

  • All Superinterfaces:
    Collection<E>, Iterable<E>, Set<E>
    All Known Subinterfaces:
    NavigableSet<E>
    All Known Implementing Classes:
    ConcurrentSkipListSet, TreeSet


    public interface SortedSet<E>
    extends Set<E>
    SortedSet is a Set which iterates over its elements in a sorted order. The order is determined either by the elements natural ordering, or by a Comparator which is passed into a concrete implementation at construction time. All elements in this set must be mutually comparable. The ordering in this set must be consistent with equals of its elements.
    See Also:
    Comparator, Comparable
    • Method Detail

      • comparator

        Comparator<? super E> comparator()
        Returns the comparator used to compare elements in this SortedSet.
        Returns:
        a comparator or null if the natural ordering is used.
      • first

        E first()
        Returns the first element in this SortedSet. The first element is the lowest element.
        Returns:
        the first element.
        Throws:
        NoSuchElementException - when this SortedSet is empty.
      • headSet

        SortedSet<E> headSet(E end)
        Returns a SortedSet of the specified portion of this SortedSet which contains elements less than the end element. The returned SortedSet is backed by this SortedSet so changes to one set are reflected by the other.
        Parameters:
        end - the end element.
        Returns:
        a subset where the elements are less than end.
        Throws:
        ClassCastException - when the class of the end element is inappropriate for this SubSet.
        NullPointerException - when the end element is null and this SortedSet does not support null elements.
      • last

        E last()
        Returns the last element in this SortedSet. The last element is the highest element.
        Returns:
        the last element.
        Throws:
        NoSuchElementException - when this SortedSet is empty.
      • subSet

        SortedSet<E> subSet(E start,
                          E end)
        Returns a SortedSet of the specified portion of this SortedSet which contains elements greater or equal to the start element but less than the end element. The returned SortedSet is backed by this SortedMap so changes to one set are reflected by the other.
        Parameters:
        start - the start element.
        end - the end element.
        Returns:
        a subset where the elements are greater or equal to start and less than end.
        Throws:
        ClassCastException - when the class of the start or end element is inappropriate for this SubSet.
        NullPointerException - when the start or end element is null and this SortedSet does not support null elements.
        IllegalArgumentException - when the start element is greater than the end element.
      • tailSet

        SortedSet<E> tailSet(E start)
        Returns a SortedSet of the specified portion of this SortedSet which contains elements greater or equal to the start element. The returned SortedSet is backed by this SortedSet so changes to one set are reflected by the other.
        Parameters:
        start - the start element.
        Returns:
        a subset where the elements are greater or equal to start .
        Throws:
        ClassCastException - when the class of the start element is inappropriate for this SubSet.
        NullPointerException - when the start element is null and this SortedSet does not support null elements.


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