edu.hws.jcm.data

Class NumUtils

java.lang.Object

edu.hws.jcm.data.NumUtils

public class NumUtils
extends Object

This class provides a few static functions for converting real numbers to strings and strings to real numbers. It should probalby be reimplemented to use the standard NumberFormat class for converting real to string.

Constructor Summary

Constructors

Constructor and Description
NumUtils()

Method Summary

Modifier and Type	Method and Description
static String	realToString(double x) Return a string representation of the real number x occupying, if possible, at most 10 spaces.
static String	realToString(double x, int width) Goal is to return a reasonable string representation of x, using at most width spaces.
static double	stringToReal(String s) Return the real number represented by the String s, or return Double.NaN if s does not represent a legal real number.

Methods inherited from class java.lang.Object

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

Constructor Detail

NumUtils

public NumUtils()

Method Detail

stringToReal

public static double stringToReal(String s)

Return the real number represented by the String s, or return Double.NaN if s does not represent a legal real number.

realToString

public static String realToString(double x)

Return a string representation of the real number x occupying, if possible, at most 10 spaces.

realToString

public static String realToString(double x,
                                  int width)

Goal is to return a reasonable string representation of x, using at most width spaces. (If the parameter width is unreasonably big or small, its value is adjusted to lie in the range 6 to 25.)

Parameters:

x - value to create string representation of.

width - maximum number of spaces used in string representation, if possible.

Returns:

a string representation for x. If x is Double.NaN, "undefined" is returned. If x is infinite, "INF" or "-INF" is returned.