public final class CollectionUtil extends Object
| 构造器和说明 |
|---|
CollectionUtil() |
| 限定符和类型 | 方法和说明 |
|---|---|
static boolean |
contains(Object[] arr,
Object target) |
static boolean |
containsAny(Collection<?> c1,
Collection<?> c2) |
static Class<?> |
getTypeFromObj(Object obj)
获取类型的class对象
如果是一个数组或者Collection,则尝试获取其中第一个元素的class
|
static int |
indexOf(Object[] arr,
Object target) |
static boolean |
isEmpty(Collection<?> collection) |
static boolean |
isEmpty(Map<?,?> map) |
static boolean |
isEmpty(Object[] arr) |
static boolean |
isNotEmpty(Collection<?> collection) |
static boolean |
isNotEmpty(Map<?,?> map) |
static boolean |
isNotEmpty(Object[] arr) |
static int |
sizeOf(Object obj) |
public static boolean isEmpty(Collection<?> collection)
public static boolean isNotEmpty(Collection<?> collection)
public static boolean isEmpty(Object[] arr)
public static boolean isNotEmpty(Object[] arr)
public static boolean isEmpty(Map<?,?> map)
public static boolean isNotEmpty(Map<?,?> map)
public static int sizeOf(Object obj)
public static boolean containsAny(Collection<?> c1, Collection<?> c2)
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