Class Solvers


  • public final class Solvers
    extends java.lang.Object
    • Constructor Summary

      Constructors 
      Constructor Description
      Solvers()  
    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      private static double solveCubicForQuartic​(double p, double q, double r)
      Return only one root for the specified cubic equation.
      static double[] solveQuadric​(double a, double b, double c)
      Solves the equation ax^2+bx+c=0.
      static double[] solveQuartic​(double a, double b, double c, double d, double e)
      Solve a quartic equation of the form ax^4+bx^3+cx^2+cx^1+d=0.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • Solvers

        public Solvers()
    • Method Detail

      • solveQuadric

        public static final double[] solveQuadric​(double a,
                                                  double b,
                                                  double c)
        Solves the equation ax^2+bx+c=0. Solutions are returned in a sorted array if they exist.
        Parameters:
        a - coefficient of x^2
        b - coefficient of x^1
        c - coefficient of x^0
        Returns:
        an array containing the two real roots, or null if no real solutions exist
      • solveQuartic

        public static double[] solveQuartic​(double a,
                                            double b,
                                            double c,
                                            double d,
                                            double e)
        Solve a quartic equation of the form ax^4+bx^3+cx^2+cx^1+d=0. The roots are returned in a sorted array of doubles in increasing order.
        Parameters:
        a - coefficient of x^4
        b - coefficient of x^3
        c - coefficient of x^2
        d - coefficient of x^1
        e - coefficient of x^0
        Returns:
        a sorted array of roots, or null if no solutions exist
      • solveCubicForQuartic

        private static final double solveCubicForQuartic​(double p,
                                                         double q,
                                                         double r)
        Return only one root for the specified cubic equation. This routine is only meant to be called by the quartic solver. It assumes the cubic is of the form: x^3+px^2+qx+r.
        Parameters:
        p -
        q -
        r -
        Returns: