org.jplot2d.util

Class NumberUtils

java.lang.Object

org.jplot2d.util.NumberUtils

public class NumberUtils
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
NumberUtils()

Method Summary

Modifier and Type	Method and Description
static boolean	approximate(double a, double b, int bit)
static java.lang.String	calcDeltaFormatStr(double v, double delta) Find a proper format to show the delta digit.
static java.lang.String	calcFormatStr(double value, int digits) Find a proper format for the given significant digits limit.
static java.lang.String	toString(double v) Format the value to avoid the round error.
static java.lang.String	toString(double v, int digits) Format the value to the given significant digits limit.
static java.lang.String	toString(float v) Format the value to avoid the round error.
static java.lang.String	toString(float v, int digits) Format the value to the given significant digits limit.

Methods inherited from class java.lang.Object

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

Constructor Detail

NumberUtils

public NumberUtils()

Method Detail

approximate

public static boolean approximate(double a,
                                  double b,
                                  int bit)

Parameters:

a -

b -

bit - the number of bits that the different is tolerated.

Returns:

calcFormatStr

public static java.lang.String calcFormatStr(double value,
                                             int digits)

Find a proper format for the given significant digits limit.

Parameters:

value - the value

digits - significant digits

Returns:

the format string for java Formatter

toString

public static java.lang.String toString(float v)

Format the value to avoid the round error. The max precision is 6 significant digits.

toString

public static java.lang.String toString(float v,
                                        int digits)

Format the value to the given significant digits limit. If the limit is 0, to avoid the round error, 6 significant digits is applied.

toString

public static java.lang.String toString(double v)

Format the value to avoid the round error. The max precision is 15 significant digits.

toString

public static java.lang.String toString(double v,
                                        int digits)

Format the value to the given significant digits limit. If the limit is 0, to avoid the round error, 15 significant digits is applied.

calcDeltaFormatStr

public static java.lang.String calcDeltaFormatStr(double v,
                                                  double delta)

Find a proper format to show the delta digit.

Parameters:

v -

delta -

Returns:

the format string for java Formatter