cn.crane4j.core.util

类 ObjectUtils

java.lang.Object

cn.crane4j.core.util.ObjectUtils

public class ObjectUtils
extends Object

Common object utils.

作者:

huangchengxing

构造器概要

构造器

构造器和说明
ObjectUtils()

方法概要

限定符和类型	方法和说明
static <T> T	defaultIfNull(T target, T defaultValue) Get target or default value if target is null.
static <T> T	get(Object target, int index) Get a specified index element from the target.
static @Nullable Class<?>	getElementType(Object target) Get type of element from the target.
static boolean	isEmpty(Object target) Determine whether the target is empty.
static boolean	isNotEmpty(Object target) Determine whether the target is not empty.

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

ObjectUtils

public ObjectUtils()

方法详细资料

getElementType

public static @Nullable Class<?> getElementType(Object target)

Get type of element from the target.
Support List, Collection, Map, Iterator, Iterable, Array.

参数:

target - target

返回:

element type

defaultIfNull

public static <T> T defaultIfNull(T target,
                                  T defaultValue)

Get target or default value if target is null.

类型参数:

T - element type

参数:

target - target

defaultValue - default value

返回:

element

get

public static <T> T get(Object target,
                        int index)

Get a specified index element from the target.
Support List, Collection, Map, Iterator, Iterable, Object[].

类型参数:

T - element type

参数:

target - target

返回:

element

isEmpty

public static boolean isEmpty(Object target)

Determine whether the target is empty.
Support Map, Collection, Iterator, Iterable, Array, CharSequence

参数:

target - target

返回:

boolean

isNotEmpty

public static boolean isNotEmpty(Object target)

Determine whether the target is not empty.

参数:

target - target

返回:

boolean