uk.ac.ed.inf.utils
Class NumberUtils

java.lang.Object
  uk.ac.ed.inf.utils.NumberUtils

public class NumberUtils
extends java.lang.Object

Class

Version:

22 Jan 2009

Author:

Luna De Ferrari luna.deferrari-at-ed.ac.uk

Constructor Summary

NumberUtils()

Method Summary

static java.lang.String	doubleTo2DecimalsString(java.lang.Double aDouble) Get a percentage representation of a double
static java.lang.String	formatPercentOneFraction(double num) Takes a double in percent returns a String with one fraction 0.85842 -> 85.8%
static java.lang.String	getValue(java.lang.Double value) Gets a string value usable for SQL DOUBLE column.

Methods inherited from class java.lang.Object

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

Constructor Detail

NumberUtils

public NumberUtils()

Method Detail

doubleTo2DecimalsString

public static java.lang.String doubleTo2DecimalsString(java.lang.Double aDouble)

Get a percentage representation of a double

Parameters:

fraction - e.g. 0.75

Returns:

a percentage, e.g. 75% public static String getPercentage(Double fraction){ Double percent = new Double(fraction); NumberFormat percentFormatter = NumberFormat.getPercentInstance(Locale.getDefault()); return percentFormatter.format(percent); }

formatPercentOneFraction

public static java.lang.String formatPercentOneFraction(double num)

Takes a double in percent returns a String with one fraction 0.85842 -> 85.8%

getValue

public static java.lang.String getValue(java.lang.Double value)

Gets a string value usable for SQL DOUBLE column. The string must be either double precision numeric or null: NaN or +/-inf are not acceptable values.

Parameters:

the - value

Returns:

the double precision value string or null if = NaN or = +/-inf