public class CollectionUtils
extends java.lang.Object
| Modifier and Type | Class and Description |
|---|---|
static class |
CollectionUtils.EmptyEnumeration<E>
An empty enumeration.
|
| Modifier and Type | Field and Description |
|---|---|
static java.util.List |
EMPTY_LIST
Deprecated.
|
| Constructor and Description |
|---|
CollectionUtils() |
| Modifier and Type | Method and Description |
|---|---|
static <E> java.util.Enumeration<E> |
append(java.util.Enumeration<E> e1,
java.util.Enumeration<E> e2)
Append one enumeration to another.
|
static <T> java.util.Collection<T> |
asCollection(java.util.Iterator<? extends T> iter)
Returns a collection containing all elements of the iterator.
|
static <E> java.util.Enumeration<E> |
asEnumeration(java.util.Iterator<E> iter)
Adapt the specified Iterator to the Enumeration interface.
|
static <E> java.util.Iterator<E> |
asIterator(java.util.Enumeration<E> e)
Adapt the specified Enumeration to the Iterator interface.
|
static boolean |
equals(java.util.Dictionary<?,?> d1,
java.util.Dictionary<?,?> d2)
Deprecated.
since 1.6.x.
|
static boolean |
equals(java.util.Vector<?> v1,
java.util.Vector<?> v2)
Deprecated.
since 1.6.x.
|
static java.lang.String |
flattenToString(java.util.Collection<?> c)
Creates a comma separated list of all values held in the given
collection.
|
static int |
frequency(java.util.Collection<?> c,
java.lang.Object o)
Counts how often the given Object occurs in the given
collection using equals() for comparison.
|
static <K,V> void |
putAll(java.util.Dictionary<? super K,? super V> m1,
java.util.Dictionary<? extends K,? extends V> m2)
Deprecated.
since 1.6.x.
|
@Deprecated
public static boolean equals(java.util.Vector<?> v1,
java.util.Vector<?> v2)
v1 - the first vector.v2 - the second vector.@Deprecated
public static boolean equals(java.util.Dictionary<?,?> d1,
java.util.Dictionary<?,?> d2)
Follows the equals contract of Java 2's Map.
d1 - the first directory.d2 - the second directory.public static java.lang.String flattenToString(java.util.Collection<?> c)
c - collection to transform@Deprecated
public static <K,V> void putAll(java.util.Dictionary<? super K,? super V> m1,
java.util.Dictionary<? extends K,? extends V> m2)
K - type of the keyV - type of the valuem1 - the to directory.m2 - the from directory.public static <E> java.util.Enumeration<E> append(java.util.Enumeration<E> e1,
java.util.Enumeration<E> e2)
E - element typee1 - the first enumeration.e2 - the subsequent enumeration.public static <E> java.util.Enumeration<E> asEnumeration(java.util.Iterator<E> iter)
E - element typeiter - the Iterator to adapt.public static <E> java.util.Iterator<E> asIterator(java.util.Enumeration<E> e)
E - element typee - the Enumeration to adapt.public static <T> java.util.Collection<T> asCollection(java.util.Iterator<? extends T> iter)
T - element typeiter - the Iterator to convertpublic static int frequency(java.util.Collection<?> c,
java.lang.Object o)
c - collection in which to searcho - object to search