Package com.alibaba.fastjson2.util

Class NumberUtils

java.lang.Object

com.alibaba.fastjson2.util.NumberUtils

public final class NumberUtils
extends Object

Author: wangy

Method Summary

Modifier and Type	Method	Description
static Scientific	doubleToScientific(double doubleValue)	Conversion of ieee floating point numbers to Scientific notation
static Scientific	floatToScientific(float floatValue)
static int	writeDouble(byte[] buf, int off, double doubleValue, boolean json)
static int	writeDouble(char[] buf, int off, double doubleValue, boolean json)
static int	writeFloat(byte[] buf, int off, float floatValue, boolean json)
static int	writeFloat(char[] buf, int off, float floatValue, boolean json)

Methods inherited from class java.lang.Object

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

Method Details

doubleToScientific

public static Scientific doubleToScientific(double doubleValue)

Conversion of ieee floating point numbers to Scientific notation

Using the difference estimation method

The output may not be the shortest, but the general result is correct

Parameters:

doubleValue - > 0

writeDouble

public static int writeDouble(byte[] buf,
 int off,
 double doubleValue,
 boolean json)

writeDouble

public static int writeDouble(char[] buf,
 int off,
 double doubleValue,
 boolean json)

writeFloat

public static int writeFloat(byte[] buf,
 int off,
 float floatValue,
 boolean json)

writeFloat

public static int writeFloat(char[] buf,
 int off,
 float floatValue,
 boolean json)

floatToScientific

public static Scientific floatToScientific(float floatValue)