ca.uqac.lif.labpal

Class NumberHelper

java.lang.Object

ca.uqac.lif.labpal.NumberHelper

public class NumberHelper
extends java.lang.Object

Utility methods for manipulating numbers

Constructor Summary

Constructors

Constructor and Description
NumberHelper()

Method Summary

Modifier and Type	Method and Description
static boolean	isNumeric(java.lang.String s) Checks if a given string contains a number
static double	roundToSignificantFigures(double num, int n) Rounds number num to n significant figures.
static java.lang.Number	toPrimitiveNumber(java.lang.String s) Converts a string into its "closest" primitive type.

Methods inherited from class java.lang.Object

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

Constructor Detail

NumberHelper

public NumberHelper()

Method Detail

roundToSignificantFigures

public static double roundToSignificantFigures(double num,
                                               int n)

Rounds number num to n significant figures. Found from StackOverflow

Parameters:

num - The number

n - The number of significant figures

Returns:

The resulting number

isNumeric

public static boolean isNumeric(java.lang.String s)

Checks if a given string contains a number

Parameters:

s - The string

Returns:

true if it contains a number, false otherwise

toPrimitiveNumber

public static java.lang.Number toPrimitiveNumber(java.lang.String s)

Converts a string into its "closest" primitive type. If the string parses as an integer, the number returned will be an int. Otherwise, if it parses as a float, the number returned will be a float. In all other cases, the returned value is null.

Parameters:

s - The string to convert into a number

Returns:

The number