com.rapidminer.tools
Class NumberParser

java.lang.Object
  com.rapidminer.tools.NumberParser

public class NumberParser
extends java.lang.Object

A heuristic number parser. That tries to analyze a given String in a more flexible way than the traditional Java number parse: 1. All "," are replaced by "." 2. ¼,½,¾ are replaced by 0.25, 0.5, 0.75 respectively 3. Ranges ([number]-[number])are matched and the arithmetic average is used as result 4. All Prefixes and suffices are ignored Example: "Weight: 8,5 - 10,5 g" would result in 9.5

Author:

Michael Wurst

Constructor Summary

NumberParser()

Method Summary

static double	parse(java.lang.String s) Parse a number possibly surrounded by other information.
static double	parseDouble(java.lang.String s) This method parses the given string as double value.

Methods inherited from class java.lang.Object

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

Constructor Detail

NumberParser

public NumberParser()

Method Detail

parse

public static double parse(java.lang.String s)

Parse a number possibly surrounded by other information.

Parameters:

s - the string

Returns:

a double representation or NaN if it cannot be parsed

parseDouble

public static double parseDouble(java.lang.String s)
                          throws java.lang.NumberFormatException

This method parses the given string as double value. It first tries the normal parse method, then tests if it is the ? and would return NaN in this case. Otherwise a NumberFormatExceptin is thrown.

Throws:

java.lang.NumberFormatException