[Overachiever]

This is my first post asking for help, so please, if there's something I should do differently, let me know.

I am getting 7 compiler errors with the following method:

  private String getNumbersAverage(ArrayList list) {
    double numbersAverage = 0;
    for (i=0, i < (list.size()), i++) {
      numbersAverage += (list.get(i));
    }
    numbersAverage = (numbersAverage / (list.size()));
    String s = Double.toString(numbersAverage);
    return s;
  }

The errors are after each of the following:

i < (list.size()) not a statement
i++ ';' expected
i++) ';' expected
(list.size()) ')' expected

numbersAverage = (numbersAverage / (list.size()));
<indentifier> expected (right after the first numbersAverage)

return ';' expected

Also, right before return, it has the error "illegal start of type"

Could anyone please explain to me why I am getting all of these errors for this simple method? I'm sure there's something that my newbish mind is missing.

If you need all the code to find the reason, please tell me.

[Fuzzyness]

well, you need to declare i and int
for (i=0, i < (list.size()), i++) { int i = 0 that should take care of that. And btw, you can use just i<list.size() dont need to put it in parenthese.

Change the return type to a double, and just return numbersAverage?
Dont see why is has to be a string, and if it does will this work yes?
String s = String.valueOf(numbersAverage);


Hope this helps!

[Overachiever]

Ok, so I changed it to this:

  private String getNumbersAverage(ArrayList list) {
    double numbersAverage = 0;
    for (int i=0, i < list.size(), i++) {
      numbersAverage += (list.get(i));
    }
    numbersAverage = (numbersAverage / (list.size()));
    String s = String.valueOf(numbersAverage);
    return s;
  }

...that helped a bit, but I'm still getting weird errors.

i < list.size() ';' expected ...right after i and after size(
i < list.size() > expected ...right after size
i < list.size() illegal start of expression ...right after size()
i < list.size(), ')' expected ...right after the comma
i++ illegal start of expression ...right after the second +

Also, I put the return type as a String because I'm using it to display the average in a JTextField.

This post has been edited by Overachiever: 09 September 2009 - 05:57 PM

[pbl]

And in the for statement, it is ";" not ","

And assuming your ArrayList contains double, you will have to cast them

   	for (int i = 0; i < list.size(); i++) {	  
			numbersAverage += (Double) list.get(i);	
		}	
 

[Overachiever]

It's working now. Thanks for helping out.

[Fuzzyness]

gah, held shift key when I hit the semi colon my bad. See! Learn lesson not to copy and paste!
yeah, I meant to do that

Glad its working now

[LynnL]

pbl, on 9 Sep, 2009 - 04:59 PM, said:

And in the for statement, it is ";" not ","

And assuming your ArrayList contains double, you will have to cast them

   	for (int i = 0; i < list.size(); i++) {	  
			numbersAverage += (Double) list.get(i);	
		}	
 

You always have a final touch up