net.hasor.cobble

类 CollectionUtils

java.lang.Object

net.hasor.cobble.CollectionUtils

public class CollectionUtils
extends Object

版本:

: 2013-4-12

作者:

赵永春 (zyc@hasor.net)

构造器概要

构造器

构造器和说明
CollectionUtils()

方法概要

限定符和类型	方法和说明
static <T> Enumeration<T>	asEnumeration(Iterator<T> iterator) 转换为 Enumeration
static <T> Enumeration<T>	asEnumeration(List<T> list) 转换为 Enumeration
static <T> List<T>	asList(Enumeration<T> enumeration)
static <T> List<T>	asList(Iterator<T> iterator)
static boolean	containsAny(Collection<?> coll1, Collection<?> coll2) Returns true iff at least one element is in both collections.
static <T,O> Iterator<O>	convertIterator(Iterator<T> oriIterator, Function<T,O> converter) 迭代器类型转换
static boolean	isEmpty(List<?> tables)
static boolean	isEmpty(Map<?,?> maps)
static boolean	isEmpty(Object[] args)
static boolean	isNotEmpty(List<?> tables)
static boolean	isNotEmpty(Map<?,?> maps)
static <T> Enumeration<T>	mergeEnumeration(Enumeration<T> enum1, Enumeration<T> enum2) 合并两个迭代器
static <T> Iterator<T>	mergeIterator(Iterator<T> iterator1, Iterator<T> iterator2) 合并两个迭代器
static int	size(List<?> list)
static int	size(Map<?,?> map)
static <T> List<List<T>>	splitList(List<T> sourceList, int groupSize) 切分list

从类继承的方法 java.lang.Object

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

构造器详细资料

CollectionUtils

public CollectionUtils()

方法详细资料

isNotEmpty

public static boolean isNotEmpty(List<?> tables)

isEmpty

public static boolean isEmpty(List<?> tables)

isNotEmpty

public static boolean isNotEmpty(Map<?,?> maps)

isEmpty

public static boolean isEmpty(Map<?,?> maps)

size

public static int size(List<?> list)

size

public static int size(Map<?,?> map)

splitList

public static <T> List<List<T>> splitList(List<T> sourceList,
                                          int groupSize)

切分list

参数:

sourceList -

groupSize - 每组定长

convertIterator

public static <T,O> Iterator<O> convertIterator(Iterator<T> oriIterator,
                                                Function<T,O> converter)

迭代器类型转换

asEnumeration

public static <T> Enumeration<T> asEnumeration(List<T> list)

转换为 Enumeration

asEnumeration

public static <T> Enumeration<T> asEnumeration(Iterator<T> iterator)

转换为 Enumeration

asList

public static <T> List<T> asList(Enumeration<T> enumeration)

asList

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

mergeEnumeration

public static <T> Enumeration<T> mergeEnumeration(Enumeration<T> enum1,
                                                  Enumeration<T> enum2)

合并两个迭代器

mergeIterator

public static <T> Iterator<T> mergeIterator(Iterator<T> iterator1,
                                            Iterator<T> iterator2)

合并两个迭代器

isEmpty

public static boolean isEmpty(Object[] args)

containsAny

public static boolean containsAny(Collection<?> coll1,
                                  Collection<?> coll2)

Returns true iff at least one element is in both collections.

In other words, this method returns true iff the intersection of coll1 and coll2 is not empty.

参数:

coll1 - the first collection, must not be null

coll2 - the first collection, must not be null

返回:

true iff the intersection of the collections is non-empty

从以下版本开始:

2.1