类名： CollectionUtil
/**
* Return {@code true} if the supplied Collection is not {@code null} or empty.
* Otherwise, return {@code false}.
*
* @param collection the Collection to check
* @return whether the given Collection is not empty
*/
CollectionUtil.isNotEmpty(Collection<?> collection);
/**
* Return {@code true} if the supplied Map is not {@code null} or empty.
* Otherwise, return {@code false}.
*
* @param map the Map to check
* @return whether the given Map is not empty
*/
CollectionUtil.isNotEmpty(Map<?,?> map);
/**
* Check whether the given Array contains the given element.
*
* @param array the Array to check
* @param element the element to look for
* @param <T> The generic tag
* @return {@code true} if found, {@code false} else
*/
CollectionUtil.contains(T[] array, T element);
/**
* Concatenates 2 arrays
*
* @param one 数组1
* @param other 数组2
* @return 新数组
*/
CollectionUtil.concat(String[] one, String[] other);
/**
* Concatenates 2 arrays
*
* @param one 数组1
* @param other 数组2
* @param clazz 数组类
* @return 新数组
*/
CollectionUtil.concat(T[] one, T[] other, Class<T> clazz);
/**
* 对象是否为数组对象
*
* @param obj 对象
* @return 是否为数组对象，如果为{@code null} 返回false
*/
CollectionUtil.isArray(Object obj);
/**
* 不可变 Set
*
* @param es 对象
* @param <E> 泛型
* @return 集合
*/
CollectionUtil.ofImmutableSet(E es);
/**
* 不可变 List
*
* @param es 对象
* @param <E> 泛型
* @return 集合
*/
CollectionUtil.ofImmutableList(E es);
/**
* Iterable 转换为List集合
*
* @param elements Iterable
* @param <E> 泛型
* @return 集合
*/
CollectionUtil.toList(Iterable<E> elements);
/**
* 将key value 数组转为 map
*
* @param keysValues key value 数组
* @param <K> key
* @param <V> value
* @return map 集合
*/
CollectionUtil.toMap(Object keysValues);
/**
* Return {@code true} if the supplied Collection is {@code null} or empty.
* Otherwise, return {@code false}.
* @param collection the Collection to check
* @return whether the given Collection is empty
*/
CollectionUtil.isEmpty(Collection<?> collection);
/**
* Return {@code true} if the supplied Map is {@code null} or empty.
* Otherwise, return {@code false}.
* @param map the Map to check
* @return whether the given Map is empty
*/
CollectionUtil.isEmpty(Map<?,?> map);
/**
* Convert the supplied array into a List. A primitive array gets converted
* into a List of the appropriate wrapper type.
* <p><b>NOTE:</b> Generally prefer the standard {@link Arrays#asList} method.
* This {@code arrayToList} method is just meant to deal with an incoming Object
* value that might be an {@code Object[]} or a primitive array at runtime.
* <p>A {@code null} source value will be converted to an empty List.
* @param source the (potentially primitive) array
* @return the converted List result
* @see ObjectUtils#toObjectArray(Object)
* @see Arrays#asList(Object[])
*/
CollectionUtil.arrayToList(Object source);
/**
* Merge the given array into the given Collection.
* @param array the array to merge (may be {@code null})
* @param collection the target Collection to merge the array into
*/
CollectionUtil.mergeArrayIntoCollection(Object array, Collection<E> collection);
/**
* Merge the given Properties instance into the given Map,
* copying all properties (key-value pairs) over.
* <p>Uses {@code Properties.propertyNames()} to even catch
* default properties linked into the original Properties instance.
* @param props the Properties instance to merge (may be {@code null})
* @param map the target Map to merge the properties into
*/
CollectionUtil.mergePropertiesIntoMap(Properties props, Map<K,V> map);
/**
* Check whether the given Iterator contains the given element.
* @param iterator the Iterator to check
* @param element the element to look for
* @return {@code true} if found, {@code false} otherwise
*/
CollectionUtil.contains(Iterator<?> iterator, Object element);
/**
* Check whether the given Enumeration contains the given element.
* @param enumeration the Enumeration to check
* @param element the element to look for
* @return {@code true} if found, {@code false} otherwise
*/
CollectionUtil.contains(Enumeration<?> enumeration, Object element);
/**
* Check whether the given Collection contains the given element instance.
* <p>Enforces the given instance to be present, rather than returning
* {@code true} for an equal element as well.
* @param collection the Collection to check
* @param element the element to look for
* @return {@code true} if found, {@code false} otherwise
*/
CollectionUtil.containsInstance(Collection<?> collection, Object element);
/**
* Return {@code true} if any element in '{@code candidates}' is
* contained in '{@code source}'; otherwise returns {@code false}.
* @param source the source Collection
* @param candidates the candidates to search for
* @return whether any of the candidates has been found
*/
CollectionUtil.containsAny(Collection<?> source, Collection<?> candidates);
/**
* Return the first element in '{@code candidates}' that is contained in
* '{@code source}'. If no element in '{@code candidates}' is present in
* '{@code source}' returns {@code null}. Iteration order is
* {@link Collection} implementation specific.
* @param source the source Collection
* @param candidates the candidates to search for
* @return the first present object, or {@code null} if not found
*/
CollectionUtil.findFirstMatch(Collection<?> source, Collection<E> candidates);
/**
* Find a single value of the given type in the given Collection.
* @param collection the Collection to search
* @param type the type to look for
* @return a value of the given type found if there is a clear match,
* or {@code null} if none or more than one such value found
*/
CollectionUtil.findValueOfType(Collection<?> collection, Class<T> type);
/**
* Find a single value of one of the given types in the given Collection:
* searching the Collection for a value of the first type, then
* searching for a value of the second type, etc.
* @param collection the collection to search
* @param types the types to look for, in prioritized order
* @return a value of one of the given types found if there is a clear match,
* or {@code null} if none or more than one such value found
*/
CollectionUtil.findValueOfType(Collection<?> collection, Class<?>[] types);
/**
* Determine whether the given Collection only contains a single unique object.
* @param collection the Collection to check
* @return {@code true} if the collection contains a single reference or
* multiple references to the same instance, {@code false} otherwise
*/
CollectionUtil.hasUniqueObject(Collection<?> collection);
/**
* Find the common element type of the given Collection, if any.
* @param collection the Collection to check
* @return the common element type, or {@code null} if no clear
* common type has been found (or the collection was empty)
*/
CollectionUtil.findCommonElementType(Collection<?> collection);
/**
* Retrieve the last element of the given Set, using {@link SortedSet#last()}
* or otherwise iterating over all elements (assuming a linked set).
* @param set the Set to check (may be {@code null} or empty)
* @return the last element, or {@code null} if none
* @since 5.0.3
* @see SortedSet
* @see LinkedHashMap#keySet()
* @see java.util.LinkedHashSet
*/
CollectionUtil.lastElement(Set<T> set);
/**
* Retrieve the last element of the given List, accessing the highest index.
* @param list the List to check (may be {@code null} or empty)
* @return the last element, or {@code null} if none
* @since 5.0.3
*/
CollectionUtil.lastElement(List<T> list);
/**
* Marshal the elements from the given enumeration into an array of the given type.
* Enumeration elements must be assignable to the type of the given array. The array
* returned will be a different instance than the array given.
*/
CollectionUtil.toArray(Enumeration<E> enumeration, A[] array);
/**
* Adapt an {@link Enumeration} to an {@link Iterator}.
* @param enumeration the original {@code Enumeration}
* @return the adapted {@code Iterator}
*/
CollectionUtil.toIterator(Enumeration<E> enumeration);
/**
* Adapt a {@code Map<K, List<V>>} to an {@code MultiValueMap<K, V>}.
* @param map the original map
* @return the multi-value map
* @since 3.1
*/
CollectionUtil.toMultiValueMap(Map<K,List<V>> map);
/**
* Return an unmodifiable view of the specified multi-value map.
* @param map the map for which an unmodifiable view is to be returned.
* @return an unmodifiable view of the specified multi-value map.
* @since 3.1
*/
CollectionUtil.unmodifiableMultiValueMap(MultiValueMap<? extends K,? extends V> map);
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.hasNext();
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.next();
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.remove();
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.getFirst(K key);
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.add(K key, V value);
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.addAll(K key, List<? extends V> values);
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.addAll(MultiValueMap<K,V> values);
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.set(K key, V value);
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.setAll(Map<K,V> values);
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.toSingleValueMap();
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.size();
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.isEmpty();
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.containsKey(Object key);
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.containsValue(Object value);
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.get(Object key);
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.put(K key, List<V> value);
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.remove(Object key);
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.putAll(Map<? extends K,? extends List<V>> map);
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.clear();
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.keySet();
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.values();
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.entrySet();
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.equals(Object other);
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.hashCode();
/**
*/
CollectionUtil collectionUtil = new CollectionUtil();
collectionUtil.toString();