Java return line of the error

Hi all,

Iam trieing to print an error with a linenumber where the error is at.

Here is a part of my code.

Code:

---

        if (turns.isEmpty())
                  {
                        throw new FileException("\r\nTurn <" + turns + "> contains zero darts" , i , file, turns);
                  }

---

What i would like to show at i is the linenumber where the error is.
turns is filled by inserting a file

Code:

---

while((turns = reader.readLine()) != null)

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I think there is a way to get the contents of the stack trace into a variable.
Then you would have to scan the contents of that variable to find the line number you are interested in.