org.shiftone.bigcalc.math.function
Class BigPiCalculator

java.lang.Object
  org.shiftone.bigcalc.core.function.AbstractNoArgumentFunction
      org.shiftone.bigcalc.math.function.BigPiCalculator

All Implemented Interfaces:

Function, Functor, MathConstants

public class BigPiCalculator

extends AbstractNoArgumentFunction

implements Function, MathConstants

Pi = 16 * arctan(1/5) + 4 * arctan(1/239) arctan(x) = x - x^3/3 + x^5/5 - x^7/7 + x^9/9 - x^11/11 ...

Version:

$Revision: 1.11 $

Author:

$Author: jeffdrost $

Field Summary

Fields inherited from interface org.shiftone.bigcalc.math.MathConstants

BD_239, FIVE, FOUR, I_TWO, ONE, TWO, ZERO

Constructor Summary

BigPiCalculator()

Method Summary

java.lang.Object	evaluate(Context context)
static java.math.BigDecimal	pi(int scale) pi/4 = 4*arctan(1/5) - arctan(1/239)
void	print(java.lang.StringBuffer sb, Context context)

Methods inherited from class org.shiftone.bigcalc.core.function.AbstractNoArgumentFunction

setArguments

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.shiftone.bigcalc.Function

setArguments

Constructor Detail

BigPiCalculator

public BigPiCalculator()

Method Detail

evaluate

public java.lang.Object evaluate(Context context)
                          throws java.lang.Exception

Specified by:

evaluate in interface Functor

Throws:

java.lang.Exception

pi

public static java.math.BigDecimal pi(int scale)

pi/4 = 4*arctan(1/5) - arctan(1/239)

Parameters:

scale -

Returns:

print

public void print(java.lang.StringBuffer sb,
                  Context context)
           throws java.lang.Exception

Specified by:

print in interface Functor

Throws:

java.lang.Exception