Package org.apfloat.samples

Class Pi

java.lang.Object

org.apfloat.samples.Pi

Direct Known Subclasses:

PiParallel

public class Pi
extends java.lang.Object

Calculates pi using four different algorithms.

Version:

1.14.0

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	Pi.AbstractBinarySplittingSeries	Abstract base class for the binary splitting series.
protected static class	Pi.BinarySplittingPiCalculator	Class for implementing the binary splitting algorithm.
static class	Pi.BinarySplittingProgressIndicator	Indicates progress of the pi calculation using the binary splitting algorithm.
protected static interface	Pi.BinarySplittingSeries	Terms for the binary splitting series.
static class	Pi.BorweinPiCalculator	Calculates pi using the Borweins' quartic algorithm.
protected static class	Pi.ChudnovskyBinarySplittingSeries	Chudnovskys' algorithm terms for the binary splitting series.
static class	Pi.ChudnovskyPiCalculator	Basic class for calculating pi using the Chudnovskys' binary splitting algorithm.
static class	Pi.GaussLegendrePiCalculator	Calculates pi using the Gauss-Legendre algorithm.
protected static class	Pi.RamanujanBinarySplittingSeries	Ramanujan's algorithm terms for the binary splitting series.
static class	Pi.RamanujanPiCalculator	Basic class for calculating pi using the Ramanujan binary splitting algorithm.

Field Summary

Fields

Modifier and Type	Field	Description
protected static java.io.PrintWriter	err	Output stream for status messages printout.
protected static java.io.PrintWriter	out	Output stream for the result printout.

Constructor Summary

Constructors

Constructor	Description
Pi()

Method Summary

Modifier and Type	Method	Description
private static void	dump()
static java.io.PrintWriter	getErr()	Get the output stream for status messages printout.
protected static int	getInt(java.lang.String arg, java.lang.String name, int minValue, int maxValue)	Parse an integer from an argument.
protected static long	getLong(java.lang.String arg, java.lang.String name, long minValue, long maxValue)	Parse a long from an argument.
static java.io.PrintWriter	getOut()	Get the output stream for the result printout.
protected static long	getPrecision(java.lang.String arg)	Parse the precision from an argument.
protected static int	getRadix(java.lang.String arg)	Parse the radix from an argument.
static void	main(java.lang.String[] args)	Command-line entry point.
static void	run(long precision, int radix, Operation<Apfloat> operation)	Execute an operation and display some additional information.
static void	setErr(java.io.PrintWriter err)	Set the output stream for status messages printout.
static void	setOut(java.io.PrintWriter out)	Set the output stream for the result printout.

Methods inherited from class java.lang.Object

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

Field Detail

out

protected static java.io.PrintWriter out

Output stream for the result printout.

err

protected static java.io.PrintWriter err

Output stream for status messages printout.

Constructor Detail

Pi

Pi()

Method Detail

getLong

protected static long getLong(java.lang.String arg,
                              java.lang.String name,
                              long minValue,
                              long maxValue)

Parse a long from an argument.

Parameters:

arg - The string to be parsed.

name - Description of the argument.

minValue - Minimum allowed value.

maxValue - Maximum allowed value.

Returns:

Valid long.

getInt

protected static int getInt(java.lang.String arg,
                            java.lang.String name,
                            int minValue,
                            int maxValue)

Parse an integer from an argument.

Parameters:

arg - The string to be parsed.

name - Description of the argument.

minValue - Minimum allowed value.

maxValue - Maximum allowed value.

Returns:

Valid integer.

getPrecision

protected static long getPrecision(java.lang.String arg)

Parse the precision from an argument.

Parameters:

arg - The string to be parsed.

Returns:

Valid precision.

getRadix

protected static int getRadix(java.lang.String arg)

Parse the radix from an argument.

Parameters:

arg - The string to be parsed.

Returns:

Valid radix.

dump

private static void dump()

run

public static void run(long precision,
                       int radix,
                       Operation<Apfloat> operation)
                throws java.io.IOException,
                       ApfloatRuntimeException

Execute an operation and display some additional information. The return value of the operation is written to out.

Parameters:

precision - The precision to be used.

radix - The radix to be used.

operation - The operation to execute.

Throws:

java.io.IOException - In case writing the output fails.

ApfloatRuntimeException

setOut

public static void setOut(java.io.PrintWriter out)

Set the output stream for the result printout.

Parameters:

out - The output stream.

getOut

public static java.io.PrintWriter getOut()

Get the output stream for the result printout.

Returns:

The output stream.

setErr

public static void setErr(java.io.PrintWriter err)

Set the output stream for status messages printout.

Parameters:

err - The output stream.

getErr

public static java.io.PrintWriter getErr()

Get the output stream for status messages printout.

Returns:

The output stream.

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException,
                        ApfloatRuntimeException

Command-line entry point.

Parameters:

args - Command-line parameters.

Throws:

java.io.IOException - In case writing the output fails.

ApfloatRuntimeException