com.lf.commons.lang

Class NumberUtils

java.lang.Object

com.lf.commons.lang.NumberUtils

public final class NumberUtils
extends java.lang.Object

Provides various methods to handle numbers safely.

Since:

1.6

Version:

$Revision: 1.7 $, $Date: 2016/01/01 15:43:02 $

Author:

Axel Schwolow

Constructor Summary

Constructors

Constructor and Description
NumberUtils() Constructor method for i18n purposes only.

Method Summary

Methods

Modifier and Type	Method and Description
static java.lang.String	formatNumber(java.lang.Object value, java.util.Locale locale, java.lang.String pattern, java.lang.String fallback) Gets a locale specific number text from a (database) object (Double, Float, BigDecimal, Integer, Long, Short).
static double	parseDouble(java.lang.Object value, double fallback) Gets a double value from a (database) object (Double, BigDecimal, String, ...).
static double	parseDouble(java.lang.String value, java.util.Locale locale, java.lang.String pattern, double fallback) Gets a locale specific double value from a text.
static float	parseFloat(java.lang.String value, java.util.Locale locale, java.lang.String pattern, float fallback) Gets a locale specific float value from a text.
static int	parseInt(java.lang.Object value, int fallback) Gets an integer value from a (database) object (Integer, String, ...).
static int	parseInt(java.lang.String value, java.util.Locale locale, java.lang.String pattern, int fallback) Gets a locale specific integer value from a text.

Methods inherited from class java.lang.Object

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

Constructor Detail

NumberUtils

public NumberUtils()
            throws java.lang.InstantiationException

Constructor method for i18n purposes only.

Can only be used if beans design time is set (e.g. by external tools like the I18NExtractor).

Throws:

java.lang.InstantiationException - Error indication

Since:

1.6

Method Detail

parseInt

public static int parseInt(java.lang.Object value,
           int fallback)

Gets an integer value from a (database) object (Integer, String, ...).

Parameters:

value - Numeric value

fallback - Returned if an error occurs

Returns:

The numeric value, fallback otherwise

Since:

1.6

parseDouble

public static double parseDouble(java.lang.Object value,
                 double fallback)

Gets a double value from a (database) object (Double, BigDecimal, String, ...).

Parameters:

value - Numeric value

fallback - Returned if an error occurs

Returns:

The numeric value, fallback otherwise

Since:

1.6

formatNumber

public static java.lang.String formatNumber(java.lang.Object value,
                            java.util.Locale locale,
                            java.lang.String pattern,
                            java.lang.String fallback)

Gets a locale specific number text from a (database) object (Double, Float, BigDecimal, Integer, Long, Short).

For Germany it's "250,0 mAh", for England it's "250.0 mAh" etc.

Parameters:

value - Textual value

locale - The locale

pattern - The formatting pattern, see DecimalFormat class

fallback - Returned if an error occurs

Returns:

The numeric value, fallback otherwise

Since:

1.6

parseInt

public static int parseInt(java.lang.String value,
           java.util.Locale locale,
           java.lang.String pattern,
           int fallback)

Gets a locale specific integer value from a text.

For Germany it's "2.500 mAh", for England it's "2,500 mAh" etc.

Parameters:

value - Textual value

locale - The locale

pattern - The formatting pattern, see DecimalFormat class

fallback - Returned if an error occurs

Returns:

The numeric value, fallback otherwise

Since:

1.6

parseDouble

public static double parseDouble(java.lang.String value,
                 java.util.Locale locale,
                 java.lang.String pattern,
                 double fallback)

Gets a locale specific double value from a text.

For Germany it's "1,50 EUR", for England it's "1.50 EUR" etc.

Parameters:

value - Textual value

locale - The locale

pattern - The formatting pattern, see DecimalFormat class

fallback - Returned if an error occurs

Returns:

The numeric value, fallback otherwise

Since:

1.6

parseFloat

public static float parseFloat(java.lang.String value,
               java.util.Locale locale,
               java.lang.String pattern,
               float fallback)

Gets a locale specific float value from a text.

For Germany it's "1,50 EUR", for England it's "1.50 EUR" etc.

Parameters:

value - Textual value

locale - The locale

pattern - The formatting pattern, see DecimalFormat class

fallback - Returned if an error occurs

Returns:

The numeric value, fallback otherwise

Since:

1.6