程序包 net.sinodawn.framework.utils

类 CollectionUtils

java.lang.Object

net.sinodawn.framework.utils.CollectionUtils

public abstract class CollectionUtils
extends Object

构造器概要

构造器

构造器	说明
CollectionUtils()

方法概要

修饰符和类型	方法	说明
static boolean	containsIgnoreCase(Collection<String> collection, String value)
static boolean	containsKeyIgnorecase(Map<String,?> map, String key)
static <S,T> List<T>	convert(List<S> itemList, Class<T> type)
static <T> List<T>	disjunction(Collection<T> first, Collection<T> second)
static <T> List<T>	distinct(List<T> itemList)
static <T> List<T>	emptyList()
static <K,V> Map<K,V>	emptyMap()
static Object	getFirstValue(Collection<?> collection)
static Object	getFirstValue(Map<?,?> map)
static Object	getValueIgnorecase(Map<String,?> map, String key)
static <T> List<T>	intersection(Collection<T> first, Collection<T> second)
static <T> boolean	isEmpty(Collection<T> coll)
static boolean	isEmpty(Map<?,?> map)
static void	lowerCaseKey(Map<String,Object> map)
static <K,V> void	putIfNotBlank(Map<K,V> map, K key, V value)
static <T> void	sort(List<T> list, Comparator<T> comparator)
static <T> List<T>	subtract(Collection<T> first, Collection<T> second)
static <T> List<T>	union(Collection<T> first, Collection<T> second)
static void	upperCaseKey(Map<String,Object> map)

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

isEmpty

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

isEmpty

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

union

public static final <T> List<T> union(Collection<T> first,
                                      Collection<T> second)

intersection

public static final <T> List<T> intersection(Collection<T> first,
                                             Collection<T> second)

disjunction

public static final <T> List<T> disjunction(Collection<T> first,
                                            Collection<T> second)

subtract

public static final <T> List<T> subtract(Collection<T> first,
                                         Collection<T> second)

containsIgnoreCase

public static final boolean containsIgnoreCase(Collection<String> collection,
                                               String value)

getFirstValue

public static final Object getFirstValue(Map<?,?> map)

getFirstValue

public static final Object getFirstValue(Collection<?> collection)

containsKeyIgnorecase

public static final boolean containsKeyIgnorecase(Map<String,?> map,
                                                  String key)

getValueIgnorecase

public static final Object getValueIgnorecase(Map<String,?> map,
                                              String key)

convert

public static <S,T> List<T> convert(List<S> itemList,
                                          Class<T> type)

distinct

public static <T> List<T> distinct(List<T> itemList)

lowerCaseKey

public static void lowerCaseKey(Map<String,Object> map)

upperCaseKey

public static void upperCaseKey(Map<String,Object> map)

putIfNotBlank

public static final <K,V> void putIfNotBlank(Map<K,V> map,
                                                   K key,
                                                   V value)

sort

public static final <T> void sort(List<T> list,
                                  Comparator<T> comparator)

emptyList

public static final <T> List<T> emptyList()

emptyMap

public static final <K,V> Map<K,V> emptyMap()