math
Class MathToken

java.lang.Object
  math.MathToken

public class MathToken
extends java.lang.Object

Parsing token representation

This class describes a single object that may be encountered in a mathematical equations, which may be a constant, a variable, a function, or an operation on teo numbers. This class contains static methods that convert a user inputted Equation into an instance of Equation, a special binary tree of MathTokens that allws the computer to evaluate custom equations. The conversion methods are not efficient, but they are not used excessivly either. This class also contains methods for performing any possible opertaion stored in a MathToken, with reasonable efficiency.

Created by Michael Rule on Mon Aug 09 2004.

Field Summary

static java.lang.String[][]

masterTokens

Constructor Summary

MathToken(char Char)

MathToken(float num)

MathToken(int num)

MathToken(MathToken token)

MathToken(MathToken[] otherTokens)

MathToken(java.lang.String data)

Method Summary

boolean	equals(int num)
boolean	equals(MathToken otherToken)
static MathToken	extractToken(java.lang.String data)
static java.lang.String	functions() Remaining methods are associated with the main block, which tests the functionality of this class *
static int	getEndParenthesis(MathToken[] token, int start)
MathToken[]	getEquation()
float	getNumber()
int	getOperationTypeId()
int	getToken()
char	getVar()
static boolean	isFirst(java.lang.String data, java.lang.String token)
boolean	isFunction()
boolean	isOperator()
boolean	isVariable()
static void	main(java.lang.String[] args)
static MathToken[]	remove(MathToken[] data, int start, int end)
static java.lang.String	removeWhiteSpace(java.lang.String data)
static MathToken[]	replace(MathToken[] data, int start, int end, MathToken replacement)
static MathToken[]	replace(MathToken[] data, int start, int end, MathToken[] replacement)
static MathToken[]	substring(MathToken[] data, int start, int end)
static Equation	toEquation(java.lang.String data) Calls the methods that convert a String into an Equation
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

masterTokens

public static final java.lang.String[][] masterTokens

Constructor Detail

MathToken

public MathToken(char Char)

Parameters:

Char -

MathToken

public MathToken(int num)

Parameters:

num -

MathToken

public MathToken(float num)

Parameters:

num -

MathToken

public MathToken(MathToken token)

Parameters:

token -

MathToken

public MathToken(MathToken[] otherTokens)

Parameters:

otherTokens -

MathToken

public MathToken(java.lang.String data)

Parameters:

data -

Method Detail

getToken

public int getToken()

Returns:

isVariable

public boolean isVariable()

Returns:

getOperationTypeId

public int getOperationTypeId()

Returns:

getVar

public char getVar()

Returns:

getNumber

public float getNumber()

Returns:

getEquation

public MathToken[] getEquation()

Returns:

equals

public boolean equals(MathToken otherToken)

Parameters:

otherToken -

Returns:

equals

public boolean equals(int num)

Parameters:

num -

Returns:

isOperator

public boolean isOperator()

Returns:

isFunction

public boolean isFunction()

Returns:

extractToken

public static MathToken extractToken(java.lang.String data)

Parameters:

data -

Returns:

isFirst

public static boolean isFirst(java.lang.String data,
                              java.lang.String token)

Parameters:

data -

token -

Returns:

removeWhiteSpace

public static java.lang.String removeWhiteSpace(java.lang.String data)

Parameters:

data -

Returns:

toEquation

public static Equation toEquation(java.lang.String data)

Calls the methods that convert a String into an Equation

Parameters:

data -

Returns:

replace

public static MathToken[] replace(MathToken[] data,
                                  int start,
                                  int end,
                                  MathToken[] replacement)

Parameters:

data -

start -

end -

replacement -

Returns:

replace

public static MathToken[] replace(MathToken[] data,
                                  int start,
                                  int end,
                                  MathToken replacement)

Parameters:

data -

start -

end -

replacement -

Returns:

remove

public static MathToken[] remove(MathToken[] data,
                                 int start,
                                 int end)

Parameters:

data -

start -

end -

Returns:

substring

public static MathToken[] substring(MathToken[] data,
                                    int start,
                                    int end)

Parameters:

data -

start -

end -

Returns:

getEndParenthesis

public static int getEndParenthesis(MathToken[] token,
                                    int start)

Parameters:

token -

start -

Returns:

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

Returns:

functions

public static java.lang.String functions()

Remaining methods are associated with the main block, which tests the functionality of this class *

Returns:

main

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

Parameters:

args -

Throws:

java.io.IOException