public class RacineExc {
  private double precision;
  
  public RacineExc(double precision) {
      this.precision = precision;
    }

  public double racine(double operande) throws ExceptionValeurNegative {
      double solution, carre, a, b;

      if (operande < 0) throw new ExceptionValeurNegative(operande);
      a = 0;
      b = operande;
      solution = (a + b)/2;
      while(b - a > precision)
	{
	  carre = solution * solution;
	  if (carre > operande) b = solution;
	  else a = solution;
	  solution = (a + b) / 2;
	}
      return solution;
    }

      public double getPrecision() {
	  return precision;
	}

      public void setPrecision(double precision) {
	  this.precision = precision;
	}
}