Re: Beginner question referring to an object in a class from within method in that class

It looks like you've defined the setFont() function in the main method itself and not the class .. Move the 2nd last brace ( } ) to just after the System.exit   ..  Also the FontDetail is defined only within the main method  .. it can't be accessed from outside of this method ..  

On Thursday, 27 July 2023 at 23:56:32 BST, Peter Dow <petercdow@xxxxxxxxx> wrote:

I'm very much a beginner with Java and I'm having a problem
understanding how scope works.

In MyPgm below, I get an error saying that fontDetail in the setFont()
method is undefined.

From what I've read in the documentation, a reference within the
setFont() method to a field within the same class but outside the method
is allowed.

Is fontDetail a field or a variable? Is it only visible within the
main() method, but not within any methods defined in main()?


public class MyPgm {

  public static void main (String[] parameters) {

    if (parameters.length == 2) {
      String FONTtype    = parameters[0];
      String fontDetailSize = parameters[1];

        wb = new SXSSFWorkbook();
        Font fontDetail = wb.getFontAt((short)0);
        setFont();

    } else {
        System.out.println("Wrong number of parameters.");
        System.exit(1);
    }
    System.exit(0);

    public static void setFont() {
        fontDetail.setFontName(FONTtype); <<=====fontDetail undefined
    }
  }
}

--
*Peter Dow* /
Dow Software Services, Inc.
909 793-9050
petercdow@xxxxxxxxx
pdow@xxxxxxxxxxxxxx /