Package com.tagtraum.core.util

Class NumberParser

java.lang.Object

com.tagtraum.core.util.NumberParser

public class NumberParser
extends Object

Utility class for faster number parsing from "Performant Java programmieren", Hendrik Schreiber, Addison Wesley 2002.

Author:

Hendrik Schreiber

Field Summary

Fields

Modifier and Type	Field	Description
static int	MAX_NEGATIVE_INTEGER_CHARS
static int	MAX_NEGATIVE_LONG_CHARS
static int	MAX_POSITIVE_INTEGER_CHARS
static int	MAX_POSITIVE_LONG_CHARS

Constructor Summary

Constructors

Constructor	Description
NumberParser()

Method Summary

Modifier and Type	Method	Description
static int	parseHex(char[] cb)	Parse 4 char hex string.
static int	parseInt(char[] cb, int offset, int length)
static int	parseInt(String s)
static int	parseInt(String s, int offset, int length)
static long	parseLong(char[] cb, int offset, int length)
static long	parseLong(String s)
static long	parseLong(String s, int offset, int length)

Methods inherited from class java.lang.Object

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

Field Detail

MAX_NEGATIVE_INTEGER_CHARS

public static final int MAX_NEGATIVE_INTEGER_CHARS

MAX_POSITIVE_INTEGER_CHARS

public static final int MAX_POSITIVE_INTEGER_CHARS

MAX_NEGATIVE_LONG_CHARS

public static final int MAX_NEGATIVE_LONG_CHARS

MAX_POSITIVE_LONG_CHARS

public static final int MAX_POSITIVE_LONG_CHARS

Constructor Detail

NumberParser

public NumberParser()

Method Detail

parseInt

public static int parseInt(char[] cb,
                           int offset,
                           int length)
                    throws NumberFormatException

Throws:

NumberFormatException

parseInt

public static int parseInt(String s)
                    throws NumberFormatException

Throws:

NumberFormatException

parseInt

public static int parseInt(String s,
                           int offset,
                           int length)
                    throws NumberFormatException

Throws:

NumberFormatException

parseLong

public static long parseLong(String s)
                      throws NumberFormatException

Throws:

NumberFormatException

parseLong

public static long parseLong(String s,
                             int offset,
                             int length)
                      throws NumberFormatException

Throws:

NumberFormatException

parseLong

public static long parseLong(char[] cb,
                             int offset,
                             int length)
                      throws NumberFormatException

Throws:

NumberFormatException

parseHex

public static int parseHex(char[] cb)

Parse 4 char hex string.

Parameters:

cb - char buffer, expected to 4 chars long

Returns:

int