程序包 com.alibaba.nacos.common.utils

类 NumberUtils

java.lang.Object

com.alibaba.nacos.common.utils.NumberUtils

public class NumberUtils
extends Object

Number utils.

作者:

zzq

方法概要

修饰符和类型	方法	说明
static boolean	isDigits(String str)	Checks whether the String contains only digit characters.
static double	toDouble(String str, double defaultValue)	Convert a String to a double, returning a default value if the conversion fails.
static float	toFloat(String str)	Convert a String to a float, returning 0.0f if the conversion fails.
static float	toFloat(String str, float defaultValue)	Convert a String to a float, returning a default value if the conversion fails.
static int	toInt(String str)	Convert a String to an int, returning zero if the conversion fails.
static int	toInt(String str, int defaultValue)	Convert a String to an int, returning a default value if the conversion fails.
static long	toLong(String str, long defaultValue)	Convert a String to a long, returning a default value if the conversion fails.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

方法详细资料

toInt

public static int toInt(String str)

Convert a String to an int, returning zero if the conversion fails.

参数:

str - the string to convert, may be null

返回:

the int represented by the string, or zero if conversion fails

toInt

public static int toInt(String str,
 int defaultValue)

Convert a String to an int, returning a default value if the conversion fails.

参数:

str - the string to convert, may be null

defaultValue - the default value

返回:

the int represented by the string, or the default if conversion fails

toLong

public static long toLong(String str,
 long defaultValue)

Convert a String to a long, returning a default value if the conversion fails.

参数:

str - the string to convert, may be null

defaultValue - the default value

返回:

the long represented by the string, or the default if conversion fails

toDouble

public static double toDouble(String str,
 double defaultValue)

Convert a String to a double, returning a default value if the conversion fails.

参数:

str - the string to convert, may be null

defaultValue - the default value

返回:

the double represented by the string, or defaultValue if conversion fails

isDigits

public static boolean isDigits(String str)

Checks whether the String contains only digit characters.

参数:

str - the String to check

返回:

true if str contains only unicode numeric

toFloat

public static float toFloat(String str)

Convert a String to a float, returning 0.0f if the conversion fails.

参数:

str - the string to convert, may be null

返回:

the float represented by the string, or 0.0f if conversion fails

toFloat

public static float toFloat(String str,
 float defaultValue)

Convert a String to a float, returning a default value if the conversion fails.

参数:

str - the string to convert, may be null

defaultValue - the default value

返回:

the float represented by the string, or defaultValue if conversion fails