com.yunlongn.common.core.utils.collection

类 CollectionUtils2

java.lang.Object

com.yunlongn.common.core.utils.collection.CollectionUtils2

public class CollectionUtils2
extends Object

Collection 工具类

作者:

Yun源码

构造器概要

构造器

构造器和说明
CollectionUtils2()

方法概要

限定符和类型	方法和说明
static <T> void	addIfNotNull(Collection<T> coll, T item)
static boolean	containsAny(Collection<?> source, Collection<?> candidates)
static boolean	containsAny(Object source, Object... targets)
static <T,U> List<U>	convertList(Collection<T> from, Function<T,U> func)
static <T,K> Map<K,T>	convertMap(Collection<T> from, Function<T,K> keyFunc)
static <T,K,V> Map<K,V>	convertMap(Collection<T> from, Function<T,K> keyFunc, Function<T,V> valueFunc)
static <T,K,V> Map<K,V>	convertMap(Collection<T> from, Function<T,K> keyFunc, Function<T,V> valueFunc, BinaryOperator<V> mergeFunction)
static <T,K,V> Map<K,V>	convertMap(Collection<T> from, Function<T,K> keyFunc, Function<T,V> valueFunc, BinaryOperator<V> mergeFunction, Supplier<? extends Map<K,V>> supplier)
static <T,K,V> Map<K,V>	convertMap(Collection<T> from, Function<T,K> keyFunc, Function<T,V> valueFunc, Supplier<? extends Map<K,V>> supplier)
static <T,K> Map<K,T>	convertMap(Collection<T> from, Function<T,K> keyFunc, Supplier<? extends Map<K,T>> supplier)
static <T,K> Map<K,List<T>>	convertMultiMap(Collection<T> from, Function<T,K> keyFunc)
static <T,K,V> Map<K,List<V>>	convertMultiMap(Collection<T> from, Function<T,K> keyFunc, Function<T,V> valueFunc)
static <T,K,V> Map<K,Set<V>>	convertMultiMap2(Collection<T> from, Function<T,K> keyFunc, Function<T,V> valueFunc)
static <T,U> Set<U>	convertSet(Collection<T> from, Function<T,U> func)
static <T,R> List<T>	distinct(Collection<T> from, Function<T,R> keyMapper)
static <T,R> List<T>	distinct(Collection<T> from, Function<T,R> keyMapper, BinaryOperator<T> cover)
static <T> List<T>	filterList(Collection<T> from, Predicate<T> predicate)
static <T> T	findFirst(List<T> from, Predicate<T> predicate)
static <T> T	getFirst(List<T> from)
static boolean	isAnyEmpty(Collection<?>... collections)

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

CollectionUtils2

public CollectionUtils2()

方法详细资料

containsAny

public static boolean containsAny(Object source,
                                  Object... targets)

isAnyEmpty

public static boolean isAnyEmpty(Collection<?>... collections)

filterList

public static <T> List<T> filterList(Collection<T> from,
                                     Predicate<T> predicate)

distinct

public static <T,R> List<T> distinct(Collection<T> from,
                                     Function<T,R> keyMapper)

distinct

public static <T,R> List<T> distinct(Collection<T> from,
                                     Function<T,R> keyMapper,
                                     BinaryOperator<T> cover)

convertList

public static <T,U> List<U> convertList(Collection<T> from,
                                        Function<T,U> func)

convertSet

public static <T,U> Set<U> convertSet(Collection<T> from,
                                      Function<T,U> func)

convertMap

public static <T,K> Map<K,T> convertMap(Collection<T> from,
                                        Function<T,K> keyFunc)

convertMap

public static <T,K> Map<K,T> convertMap(Collection<T> from,
                                        Function<T,K> keyFunc,
                                        Supplier<? extends Map<K,T>> supplier)

convertMap

public static <T,K,V> Map<K,V> convertMap(Collection<T> from,
                                          Function<T,K> keyFunc,
                                          Function<T,V> valueFunc)

convertMap

public static <T,K,V> Map<K,V> convertMap(Collection<T> from,
                                          Function<T,K> keyFunc,
                                          Function<T,V> valueFunc,
                                          BinaryOperator<V> mergeFunction)

convertMap

public static <T,K,V> Map<K,V> convertMap(Collection<T> from,
                                          Function<T,K> keyFunc,
                                          Function<T,V> valueFunc,
                                          Supplier<? extends Map<K,V>> supplier)

convertMap

public static <T,K,V> Map<K,V> convertMap(Collection<T> from,
                                          Function<T,K> keyFunc,
                                          Function<T,V> valueFunc,
                                          BinaryOperator<V> mergeFunction,
                                          Supplier<? extends Map<K,V>> supplier)

convertMultiMap

public static <T,K> Map<K,List<T>> convertMultiMap(Collection<T> from,
                                                   Function<T,K> keyFunc)

convertMultiMap

public static <T,K,V> Map<K,List<V>> convertMultiMap(Collection<T> from,
                                                     Function<T,K> keyFunc,
                                                     Function<T,V> valueFunc)

convertMultiMap2

public static <T,K,V> Map<K,Set<V>> convertMultiMap2(Collection<T> from,
                                                     Function<T,K> keyFunc,
                                                     Function<T,V> valueFunc)

containsAny

public static boolean containsAny(Collection<?> source,
                                  Collection<?> candidates)

getFirst

public static <T> T getFirst(List<T> from)

findFirst

public static <T> T findFirst(List<T> from,
                              Predicate<T> predicate)

addIfNotNull

public static <T> void addIfNotNull(Collection<T> coll,
                                    T item)