How to use

org.matheclipse.parser.client.eval.DoubleEvaluator

constructor

/**
 * Parse the given <code>expression String</code> and return the resulting ASTNode
 * 
 * @param expression
 * @return
 * @throws SyntaxError
 */
public static ASTNode parseNode(String expression, boolean relaxedSyntax) {
  DoubleEvaluator doubleEvaluator = new DoubleEvaluator(relaxedSyntax);
  return doubleEvaluator.parse(expression);
}

/**
 * Parse the given <code>expression String</code> and return the resulting
 * ASTNode.
 * 
 * @param expression the expression
 * @return the AST node
 * @throws SyntaxError the syntax error
 */
public static ASTNode parseNode( String expression ) {
  DoubleEvaluator doubleEvaluator = new DoubleEvaluator();
  return doubleEvaluator.parse( expression );
}

/**
 * Parse the given <code>expression String</code> and return the resulting
 * ASTNode
 * 
 * @param expression
 * @return
 * @throws SyntaxError
 */
public static ASTNode parseNode(String expression) {
 DoubleEvaluator doubleEvaluator = new DoubleEvaluator();
 return doubleEvaluator.parse(expression);
}

  return ComplexEvaluator.toString(c);
} else {
  DoubleEvaluator engine = new DoubleEvaluator();
  double d = engine.evaluate(strEval);
  return Double.toString(d);

DoubleEvaluator engine = new DoubleEvaluator();
double d = engine.evaluate( strEval );
return Double.toString( d );