de.alpharogroup.collections

Class CollectionExtensions

java.lang.Object

de.alpharogroup.collections.CollectionExtensions

public final class CollectionExtensions
extends Object

The class CollectionExtensions is an extension class for use with Collection objects.

Constructor Summary

Constructors

Constructor and Description
CollectionExtensions()

Method Summary

Modifier and Type	Method and Description
static <T> void	difference(Collection<T> collection1, Collection<T> collection2) Difference.
static <T> Collection<T>	intersection(Collection<T>... toIntersect) Intersection of the given collections.
static <T> boolean	isEmpty(Collection<T> collection) Checks if the given Collection is null or empty.
static <T> boolean	isNotEmpty(Collection<T> collection) Checks if the given Collection is not null or empty

Methods inherited from class java.lang.Object

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

Constructor Detail

CollectionExtensions

public CollectionExtensions()

Method Detail

difference

public static <T> void difference(Collection<T> collection1,
                                  Collection<T> collection2)

Difference.

Type Parameters:

T - the generic type

Parameters:

collection1 - the collection 1

collection2 - the collection 2

intersection

@SafeVarargs
public static <T> Collection<T> intersection(Collection<T>... toIntersect)

Intersection of the given collections. Internally this method uses the Collection.retainAll(Collection) for come to the result.

Type Parameters:

T - the generic type

Parameters:

toIntersect - the to intersect

Returns:

the result of the intersection. This will be the first collection that contains the result.

isNotEmpty

public static <T> boolean isNotEmpty(Collection<T> collection)

Checks if the given Collection is not null or empty

Type Parameters:

T - the generic type

Parameters:

collection - The collection to check

Returns:

true if the given Collection is null or empty otherwise false

isEmpty

public static <T> boolean isEmpty(Collection<T> collection)

Checks if the given Collection is null or empty.

Type Parameters:

T - the generic type

Parameters:

collection - The collection to check

Returns:

true if the given Collection is null or empty otherwise false.