Java: Windows terminal isn't updating classes?

Okay, so I have a method that writes the content of an integer array to a file, one per line. This is part of a bigger class, but I can confirm that everything works except for this last method.

The exception that Java throws is a NullPointerException, so.. y'know. Null pointer.

Here's the relevant code:

Code:

import java.io.FileWriter;
import java.io.IOException;
...
    private static void printArray(int[] arr, String outFile){
        try {
            [U]FileWriter outputFile = new FileWriter(outFile);[/U]
            for(int i = 0; i < arr.length; i++){
                String intWriter = Integer.toString(arr[i]);
                outputFile.write(intWriter + "\n");
            }
            outputFile.close();
            System.out.println("Successsfully written " + outFile + "\n");
        }
        catch(IOException ex){
            ex.printStackTrace();
        }
    }

I honestly don't know what's wrong here and it's pissing me off.

EDIT: The exact line that gives the exception is underlined now.

outFile is a string. Of course.
Fixed it: string wasn't being initialized correctly and was returning a null value.

See post 1 for new problem.