模块 wjybxx.base

程序包 cn.wjybxx.base

类 ObjectUtils

java.lang.Object

cn.wjybxx.base.ObjectUtils

public class ObjectUtils
extends Object

一些基础的扩展

作者:

wjybxx date - 2023/4/17

构造器概要

构造器

构造器	说明
ObjectUtils()

方法概要

修饰符和类型	方法	说明
static String	blankToDef(String str, String def)	空白字符串转默认字符串 -- 避免string泛型转换
static <T extends CharSequence> T	blankToDef(T str, T def)	空白字符串转默认字符串
static boolean	containsWhitespace(CharSequence cs)	是否包含不可见字符
static String	emptyToDef(String str, String def)	空字符串转默认字符串 -- 避免string泛型转换
static <T extends CharSequence> T	emptyToDef(T str, T def)	空字符串转默认字符串
static String	firstCharToLowerCase(String str)	首字母小写
static String	firstCharToUpperCase(String str)	首字母大写
static int	hashCode(Object first)
static int	hashCode(Object... args)
static int	hashCode(Object first, Object second)
static int	hashCode(Object first, Object second, Object third)
static boolean	isBlank(CharSequence cs)
static boolean	isEmpty(CharSequence cs)
static char	lastChar(CharSequence value)	获取字符串的尾字符
static int	length(CharSequence cs)
static <V> V	nullToDef(V obj, V def)	如果给定参数为null，则返回给定的默认值，否则返回值本身 Objects.requireNonNullElse(Object, Object)不允许def为null
static String	toString(Object object, String nullDef)
static String	toStringIfNotNull(Object object)

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

nullToDef

public static <V> V nullToDef(V obj,
 V def)

如果给定参数为null，则返回给定的默认值，否则返回值本身 Objects.requireNonNullElse(Object, Object)不允许def为null

hashCode

public static int hashCode(Object first)

hashCode

public static int hashCode(Object first,
 Object second)

hashCode

public static int hashCode(Object first,
 Object second,
 Object third)

hashCode

public static int hashCode(Object... args)

toString

public static String toString(Object object,
 String nullDef)

toStringIfNotNull

public static String toStringIfNotNull(Object object)

length

public static int length(CharSequence cs)

isEmpty

public static boolean isEmpty(CharSequence cs)

isBlank

public static boolean isBlank(CharSequence cs)

emptyToDef

public static <T extends CharSequence> T emptyToDef(T str,
 T def)

空字符串转默认字符串

blankToDef

public static <T extends CharSequence> T blankToDef(T str,
 T def)

空白字符串转默认字符串

emptyToDef

public static String emptyToDef(String str,
 String def)

空字符串转默认字符串 -- 避免string泛型转换

blankToDef

public static String blankToDef(String str,
 String def)

空白字符串转默认字符串 -- 避免string泛型转换

lastChar

public static char lastChar(CharSequence value)

获取字符串的尾字符

firstCharToUpperCase

public static String firstCharToUpperCase(String str)

首字母大写

firstCharToLowerCase

public static String firstCharToLowerCase(String str)

首字母小写

containsWhitespace

public static boolean containsWhitespace(CharSequence cs)

是否包含不可见字符