de.hpi.fgis.dude.util
Class CollectionUtil

java.lang.Object
  de.hpi.fgis.dude.util.CollectionUtil

public class CollectionUtil
extends Object

Convenience methods for collections.

Author:

Arvid.Heise

Constructor Summary

CollectionUtil()

Method Summary

static <T> List<T>	asList(Iterator<T> iterator) Materializes the elements of the given Iterator into a List.
static <T> T	first(Iterable<T> iterable) Returns the first element of the collection.
static <T> T	first(List<T> list) Returns the first element of the collection.
static <T> T	last(Iterable<T> iterable) Returns the last element of the collection.
static <T> T	last(List<T> list) Returns the last element of the collection.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CollectionUtil

public CollectionUtil()

Method Detail

last

public static <T> T last(List<T> list)

Returns the last element of the collection.

Type Parameters:

T - the element type

Parameters:

list - the collection

Returns:

the last element or null if the list is empty

last

public static <T> T last(Iterable<T> iterable)

Returns the last element of the collection.

Type Parameters:

T - the element type

Parameters:

iterable - the collection

Returns:

the last element or null if the list is empty

first

public static <T> T first(List<T> list)

Returns the first element of the collection.

Type Parameters:

T - the element type

Parameters:

list - the collection

Returns:

the first element or null if the list is empty

first

public static <T> T first(Iterable<T> iterable)

Returns the first element of the collection.

Type Parameters:

T - the element type

Parameters:

iterable - the collection

Returns:

the first element or null if the list is empty

asList

public static <T> List<T> asList(Iterator<T> iterator)

Materializes the elements of the given Iterator into a List.

Type Parameters:

T - the element type

Parameters:

iterator - the Iterator to materialize

Returns:

the List containing the materialized elements.