org.codehaus.jackson.io

类 NumberInput

java.lang.Object

org.codehaus.jackson.io.NumberInput

public final class NumberInput
extends Object

字段概要

字段

限定符和类型	字段和说明
static String	NASTY_SMALL_DOUBLE Textual representation of a double constant that can cause nasty problems with JDK (see http://www.exploringbinary.com/java-hangs-when-converting-2-2250738585072012e-308).

构造器概要

构造器

构造器和说明
NumberInput()

方法概要

方法

限定符和类型	方法和说明
static boolean	inLongRange(char[] digitChars, int offset, int len, boolean negative) Helper method for determining if given String representation of an integral number would fit in 64-bit Java long or not.
static boolean	inLongRange(String numberStr, boolean negative) Similar to inLongRange(char[],int,int,boolean), but with String argument
static double	parseAsDouble(String input, double defaultValue)
static int	parseAsInt(String input, int defaultValue)
static long	parseAsLong(String input, long defaultValue)
static double	parseDouble(String numStr)
static int	parseInt(char[] digitChars, int offset, int len) Fast method for parsing integers that are known to fit into regular 32-bit signed int type.
static int	parseInt(String str) Helper method to (more) efficiently parse integer numbers from String values.
static long	parseLong(char[] digitChars, int offset, int len)
static long	parseLong(String str)

从类继承的方法 java.lang.Object

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

字段详细资料

NASTY_SMALL_DOUBLE

public static final String NASTY_SMALL_DOUBLE

Textual representation of a double constant that can cause nasty problems with JDK (see http://www.exploringbinary.com/java-hangs-when-converting-2-2250738585072012e-308).

另请参阅:

常量字段值

构造器详细资料

NumberInput

public NumberInput()

方法详细资料

parseInt

public static final int parseInt(char[] digitChars,
           int offset,
           int len)

Fast method for parsing integers that are known to fit into regular 32-bit signed int type. This means that length is between 1 and 9 digits (inclusive)

Note: public to let unit tests call it

parseInt

public static final int parseInt(String str)

Helper method to (more) efficiently parse integer numbers from String values.

从以下版本开始:

1.7

parseLong

public static final long parseLong(char[] digitChars,
             int offset,
             int len)

parseLong

public static final long parseLong(String str)

inLongRange

public static final boolean inLongRange(char[] digitChars,
                  int offset,
                  int len,
                  boolean negative)

Helper method for determining if given String representation of an integral number would fit in 64-bit Java long or not. Note that input String must NOT contain leading minus sign (even if 'negative' is set to true).

参数:

negative - Whether original number had a minus sign (which is NOT passed to this method) or not

inLongRange

public static final boolean inLongRange(String numberStr,
                  boolean negative)

Similar to inLongRange(char[],int,int,boolean), but with String argument

参数:

negative - Whether original number had a minus sign (which is NOT passed to this method) or not

从以下版本开始:

1.5.0

parseAsInt

public static int parseAsInt(String input,
             int defaultValue)

从以下版本开始:

1.6

parseAsLong

public static long parseAsLong(String input,
               long defaultValue)

从以下版本开始:

1.6

parseAsDouble

public static double parseAsDouble(String input,
                   double defaultValue)

从以下版本开始:

1.6

parseDouble

public static final double parseDouble(String numStr)
                                throws NumberFormatException

抛出:

NumberFormatException

从以下版本开始:

1.8