Uses of Interface
java.util.Comparator

Packages that use Comparator

Package	Description
java.util	Utilities

Uses of Comparator in java.util

Methods in java.util that return Comparator

Modifier and Type	Method and Description
Comparator<? super T>	TreeSet.comparator() Returns this Set's comparator.
Comparator<? super K>	TreeMap.comparator() Return the comparator used to sort this map, or null if it is by natural order.
Comparator<? super E>	SortedSet.comparator() Returns the comparator used in sorting this set, or null if it is the elements' natural ordering.
Comparator<? super K>	SortedMap.comparator() Returns the comparator used in sorting this map, or null if it is the keys' natural ordering.
Comparator<? super E>	PriorityQueue.comparator()
static <T> Comparator<T>	Collections.reverseOrder() Get a comparator that implements the reverse of natural ordering.
static <T> Comparator<T>	Collections.reverseOrder(Comparator<T> c) Get a comparator that implements the reverse of the ordering specified by the given Comparator.

Methods in java.util with parameters of type Comparator

Modifier and Type	Method and Description
static <T> int	Collections.binarySearch(List<? extends T> l, T key, Comparator<? super T> c) Perform a binary search of a List for a key, using a supplied Comparator.
static <T> int	Arrays.binarySearch(T[] a, int low, int hi, T key, Comparator<? super T> c) Perform a binary search of a range of an Object array for a key using a Comparator.
static <T> int	Arrays.binarySearch(T[] a, T key, Comparator<? super T> c) Perform a binary search of an Object array for a key, using a supplied Comparator.
static <T> T	Collections.max(Collection<? extends T> c, Comparator<? super T> order) Find the maximum element in a Collection, according to a specified Comparator.
static <T> T	Collections.min(Collection<? extends T> c, Comparator<? super T> order) Find the minimum element in a Collection, according to a specified Comparator.
static <T> Comparator<T>	Collections.reverseOrder(Comparator<T> c) Get a comparator that implements the reverse of the ordering specified by the given Comparator.
static <T> void	Collections.sort(List<T> l, Comparator<? super T> c) Sort a list according to a specified Comparator.
static <T> void	Arrays.sort(T[] a, Comparator<? super T> c) Sort an array of Objects according to a Comparator.
static <T> void	Arrays.sort(T[] a, int fromIndex, int toIndex, Comparator<? super T> c) Sort an array of Objects according to a Comparator.

Constructors in java.util with parameters of type Comparator

Constructor and Description
PriorityQueue(int cap, Comparator<? super E> comp)
TreeMap(Comparator<? super K> c) Instantiate a new TreeMap with no elements, using the provided comparator to sort.
TreeSet(Comparator<? super T> comparator) Construct a new TreeSet whose backing TreeMap uses the supplied Comparator.