Class TartagliaExpressionParser

java.lang.Object
math.tartaglia.TartagliaExpressionParser
public class TartagliaExpressionParser extends Object

  • Field Details

  • Constructor Details

    • TartagliaExpressionParser

      public TartagliaExpressionParser(String expression)

  • Method Details

    • getCoefficients

      public ArrayList<Double> getCoefficients()
      Returns:
      the coefficients ArrayList object.

    • freeWhiteSpaces

      public void freeWhiteSpaces()
      removes white space from the ArrayList

    • setValid

      public void setValid(boolean valid)

    • isValid

      public boolean isValid()

    • setScanner

      public void setScanner(ArrayList<String> scanner)

    • getScanner

      public ArrayList<String> getScanner()

    • setExpression

      public void setExpression(String expression)

    • getExpression

      public String getExpression()

    • plusAndMinusStringHandler

      private void plusAndMinusStringHandler()
      Handles consecutive strings of plus and minus operators and simplifies them, replacing them with their single equivalent in plus and minus terms.e.g +++---+ is equivalent to a - and --++-- is equivalent to a +.

    • indexOfLetter

      private int indexOfLetter(String input)
      Parameters:
      input - The word to search.
      Returns:
      the first index of occurrence of a letter, and -1 if no letter of the English alphabet is present.

    • startsWithDigitOrPoint

      private boolean startsWithDigitOrPoint(String input)
      Parameters:
      input - The word to search.
      Returns:
      true if the input begins with a digit or a point.

    • startsWithLetter

      private boolean startsWithLetter(String input)
      Parameters:
      input - The word to search.
      Returns:
      true if the input begins with a letter.

    • scan

      private void scan()
      Scan the system.

    • appendOneToStartOfFreeVariables

      public void appendOneToStartOfFreeVariables()
      When the situation x+2y+z=9; is met, this method will convert it into 1.0x+2y+z=9;

    • validateEqualsSymbol

      public void validateEqualsSymbol()

    • validateChars

      public void validateChars()
      Checks the character set of this parser.

    • validateVars

      public void validateVars()
      Checks if the variables are properly arranged wrt other tokens.

    • validateNumbers

      public void validateNumbers()
      Checks the left and right of a number to see if the appropriate items are the ones there. It is a syntax error if an invalid item is found there

    • validateAll

      private void validateAll()
      The validator of the expression.

    • recognizeNegativesAndPositives

      public void recognizeNegativesAndPositives()

    • recognizeCompoundVariables

      public void recognizeCompoundVariables()
      turns the Xsquare into a single variable.

    • getUnknown

      public String getUnknown()
      Returns:
      the name of the unknown.

    • doArithmetic

      public void doArithmetic()
      This method initializes the coefficients field with the coefficient of Xsquared at index 0 the coefficient of X at index 1 the coefficient of the constant term at index 2

    • interpretedSystem

      public String interpretedSystem()
      Returns:
      the reduced form of the system in the form Ax³+Bx+C=0;

    • main

      public static void main(String[] args)