com.jn.langx.util

类 Numbers

java.lang.Object

com.jn.langx.util.Numbers

public class Numbers
extends Object

构造器概要

构造器

构造器和说明
Numbers()

方法概要

限定符和类型	方法和说明
static BigDecimal	createBigDecimal(String str) Convert a String to a BigDecimal.
static BigInteger	createBigInteger(String str) Convert a String to a BigInteger.
static Double	createDouble(String str) Convert a String to a Double.
static Float	createFloat(String str) Convert a String to a Float.
static Integer	createInteger(String str)
static Long	createLong(String str) Convert a String to a Long.
static Number	createNumber(String str)
static boolean	isDigits(String str) Checks whether the String contains only digit characters.
static boolean	isNumber(String str) Checks whether the String a valid Java number.

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

Numbers

public Numbers()

方法详细资料

createFloat

public static Float createFloat(String str)

Convert a String to a Float.

Returns null if the string is null.

参数:

str - a String to convert, may be null

返回:

converted Float

抛出:

NumberFormatException - if the value cannot be converted

createDouble

public static Double createDouble(String str)

Convert a String to a Double.

Returns null if the string is null.

参数:

str - a String to convert, may be null

返回:

converted Double

抛出:

NumberFormatException - if the value cannot be converted

createInteger

public static Integer createInteger(String str)

createLong

public static Long createLong(String str)

Convert a String to a Long.

Returns null if the string is null.

参数:

str - a String to convert, may be null

返回:

converted Long

抛出:

NumberFormatException - if the value cannot be converted

createBigInteger

public static BigInteger createBigInteger(String str)

Convert a String to a BigInteger.

Returns null if the string is null.

参数:

str - a String to convert, may be null

返回:

converted BigInteger

抛出:

NumberFormatException - if the value cannot be converted

createBigDecimal

public static BigDecimal createBigDecimal(String str)

Convert a String to a BigDecimal.

Returns null if the string is null.

参数:

str - a String to convert, may be null

返回:

converted BigDecimal

抛出:

NumberFormatException - if the value cannot be converted

isDigits

public static boolean isDigits(String str)

Checks whether the String contains only digit characters.

Null and empty String will return false.

参数:

str - the String to check

返回:

true if str contains only unicode numeric

isNumber

public static boolean isNumber(String str)

Checks whether the String a valid Java number.

Valid numbers include hexadecimal marked with the 0x qualifier, scientific notation and numbers marked with a type qualifier (e.g. 123L).

Null and empty String will return false.

参数:

str - the String to check

返回:

true if the string is a correctly formatted number

createNumber

public static Number createNumber(String str)
                           throws NumberFormatException

抛出:

NumberFormatException