public class ListUtil extends Object
org.apache.commons.collections4.ListUtils| 构造器和说明 |
|---|
ListUtil() |
| 限定符和类型 | 方法和说明 |
|---|---|
static <T> boolean |
addAll(Collection<T> collection,
Iterator<? extends T> iterator) |
static <T> T |
checkNotNull(T reference) |
static <T> List<T> |
emptyIfNull(List<T> list)
如果集合为空 则返回空list 如果不是就返回本身
|
static <T> boolean |
isEmpty(List<T> list)
判断集合是否为空 如果为空则返回true 反之为false
|
static <E> ArrayList<E> |
newArrayList()
创建一个list
|
static <E> ArrayList<E> |
newArrayList(Class<E> clazz)
创建一个并制定类型
|
static <E> ArrayList<E> |
newArrayList(E... elements) |
static <E> ArrayList<E> |
newArrayList(Iterator<? extends E> elements) |
static int |
saturatedCast(long value) |
public static <E> ArrayList<E> newArrayList()
@SafeVarargs public static <E> ArrayList<E> newArrayList(E... elements)
public static <T> boolean addAll(Collection<T> collection, Iterator<? extends T> iterator)
public static <T> T checkNotNull(T reference)
public static int saturatedCast(long value)
public static <T> List<T> emptyIfNull(List<T> list)
list - public static <T> boolean isEmpty(List<T> list)
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