Question

I am new to the jexcel api and have not yet successfully added a formula.

Whenever I try to compile a formula I get the compile error:

Exception in thread "main" java.util.EmptyStackException
　　　　　at java.util.Stack.peek(Stack.java:102)
　　　　　at java.util.Stack.pop(Stack.java:84)
　　　　　at jxl.biff.formula.BinaryOperator.getOperands(BinaryOperator.java:61)
　　　　　at jxl.biff.formula.StringFormulaParser.parseCurrent(StringFormulaParser.java:240)
　　　　　at jxl.biff.formula.StringFormulaParser.parse(StringFormulaParser.java:113)
　　　　　at jxl.biff.formula.FormulaParser.parse(FormulaParser.java:161)
　　　　　at jxl.write.biff.FormulaRecord.initialize(FormulaRecord.java:160)
　　　　　at jxl.write.biff.FormulaRecord.setCellDetails(FormulaRecord.java:243)
　　　　　at jxl.write.biff.WritableSheetImpl.addCell(WritableSheetImpl.java:1199)

With addCell being called from

Formula formula;
formula = new Formula(column, row, string, arial);
sheet.addCell(formula);

Please let me know if I’m making some obvious mistake and what steps I can take in order to properly add a formula to my spreadsheet.

Answer 1

/**
 * Looks at the object at the top of this stack without removing it
 * from the stack.
 *
 * @return     the object at the top of this stack (the last item
 *             of the <tt>Vector</tt> object).
 * @exception  EmptyStackException  if this stack is empty.
 */
public synchronized E peek() {
int len = size();

if (len == 0)
    throw new EmptyStackException();
return elementAt(len - 1);
}

so the error you got is similar to NullPointerException, with the difference, that your stack is empty, so you can’t peek anything from it.

That can suggest that there’s something wrong with your string

Here is a tutorial http://www.java-tips.org/other-api-tips/jexcel/how-to-create-an-excel-file.html talking also about creating Formulas.

And here is anouther one: http://r4r.co.in/java/apis/jexcel/basic/example/jexcel_basic_examples.php?id=774&option=Jexcel%20Example