de.unkrig.commons.util.collections

Class CollectionUtil

java.lang.Object

de.unkrig.commons.util.collections.CollectionUtil

public final class CollectionUtil
extends Object

java.util.collection-related utility methods.

Field Summary

Fields

Modifier and Type	Field and Description
static Iterator	AT_END Deprecated. Moved to IteratorUtil.AT_END
static SortedMap	EMPTY_SORTED_MAP Deprecated. Has moved to MapUtil.EMPTY_SORTED_MAP
static SortedSet	EMPTY_SORTED_SET Deprecated. Has moved to Sets.EMPTY_SORTED_SET

Method Summary

Modifier and Type	Method and Description
static <K,V> SortedMap<K,V>	emptySortedMap() Deprecated. Has moved to MapUtil.emptySortedMap()
static <T> SortedSet<T>	emptySortedSet() Deprecated. Has moved to Sets.emptySortedSet()
static <K,V> Map.Entry<K,V>	entry(K key, V initialValue) Deprecated. Has moved to MapUtil.entry(Object, Object)
static <K,V> HashMap<K,V>	hashMapOf(int initialCapacity, Map.Entry<K,V>... entries) Deprecated. Has moved to MapUtil.hashMapOf(int, java.util.Map.Entry...)
static <K,V> HashMap<K,V>	hashMapOf(Map.Entry<K,V>... entries) Deprecated. Has moved to MapUtil.hashMapOf(java.util.Map.Entry...)
static <K,V> Map<K,V>	map(K[] keys, V[] values) Deprecated. Has moved to MapUtil.map(Object[], Object[])
static <K,V> Map<K,V>	map(Object... keyValuePairs) Deprecated. Has moved to MapUtil.map(Object...)
static <K,V,M extends Map<K,V>> M	putAll(M subject, boolean allowDuplicateKeys, Map.Entry<K,V>... entries) Deprecated. Has moved to MapUtil.putAll(Map, boolean, java.util.Map.Entry...)
static <K,V,M extends Map<K,V>> M	putAll(M subject, Map.Entry<K,V>... entries) Deprecated. Has moved to MapUtil.putAll(Map, java.util.Map.Entry...)
static <T> T	removeFirstFrom(Collection<T> subject) Removes and returns the first element of the given collection.
static <T> Collection<T>	sorted(Collection<T> collection) Returns an unmodifiable collection containing the elements of the given collection, but sorted by their "natural ordering".
static char[]	toCharArray(Set<Character> charSet)
static int[]	toIntArray(Set<Integer> intSet)
static <K,V> TreeMap<K,V>	treeMapOf(Map.Entry<K,V>... entries) Deprecated. Has moved to MapUtil.treeMapOf(java.util.Map.Entry...)

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_SORTED_MAP

@Deprecated
public static final SortedMap EMPTY_SORTED_MAP

Deprecated. Has moved to MapUtil.EMPTY_SORTED_MAP

EMPTY_SORTED_SET

@Deprecated
public static final SortedSet EMPTY_SORTED_SET

Deprecated. Has moved to Sets.EMPTY_SORTED_SET

AT_END

@Deprecated
public static final Iterator AT_END

Deprecated. Moved to IteratorUtil.AT_END

Method Detail

removeFirstFrom

@Nullable
public static <T> T removeFirstFrom(Collection<T> subject)

Removes and returns the first element of the given collection. This is also known as the 'shift' operation.

Returns:

null iff the collection is empty

map

@Deprecated
public static <K,V> Map<K,V> map(Object... keyValuePairs)

Deprecated. Has moved to MapUtil.map(Object...)

map

@Deprecated
public static <K,V> Map<K,V> map(K[] keys,
                                              V[] values)

Deprecated. Has moved to MapUtil.map(Object[], Object[])

hashMapOf

@Deprecated
public static <K,V> HashMap<K,V> hashMapOf(Map.Entry<K,V>... entries)

Deprecated. Has moved to MapUtil.hashMapOf(java.util.Map.Entry...)

hashMapOf

@Deprecated
public static <K,V> HashMap<K,V> hashMapOf(int initialCapacity,
                                                        Map.Entry<K,V>... entries)

Deprecated. Has moved to MapUtil.hashMapOf(int, java.util.Map.Entry...)

treeMapOf

@Deprecated
public static <K,V> TreeMap<K,V> treeMapOf(Map.Entry<K,V>... entries)

Deprecated. Has moved to MapUtil.treeMapOf(java.util.Map.Entry...)

putAll

@Deprecated
public static <K,V,M extends Map<K,V>> M putAll(M subject,
                                                             Map.Entry<K,V>... entries)

Deprecated. Has moved to MapUtil.putAll(Map, java.util.Map.Entry...)

putAll

@Deprecated
public static <K,V,M extends Map<K,V>> M putAll(M subject,
                                                             boolean allowDuplicateKeys,
                                                             Map.Entry<K,V>... entries)

Deprecated. Has moved to MapUtil.putAll(Map, boolean, java.util.Map.Entry...)

entry

@Deprecated
public static <K,V> Map.Entry<K,V> entry(K key,
                                                      V initialValue)

Deprecated. Has moved to MapUtil.entry(Object, Object)

emptySortedMap

@Deprecated
public static <K,V> SortedMap<K,V> emptySortedMap()

Deprecated. Has moved to MapUtil.emptySortedMap()

emptySortedSet

@Deprecated
public static <T> SortedSet<T> emptySortedSet()

Deprecated. Has moved to Sets.emptySortedSet()

sorted

public static <T> Collection<T> sorted(Collection<T> collection)

Returns an unmodifiable collection containing the elements of the given collection, but sorted by their "natural ordering".

toCharArray

public static char[] toCharArray(Set<Character> charSet)

Returns:

A char[] that contains all elements of the charSet

Throws:

NullPointerException - The charSet contained a null element

toIntArray

public static int[] toIntArray(Set<Integer> intSet)

Returns:

An int[] that contains all elements of the intSet

Throws:

NullPointerException - The intSet contained a null element