[roots]

Code:

		try {
			output = new BufferedWriter(new FileWriter(file));
			//output.write(anAL);
			
			for (Iterator elementsInList = anAL.iterator(); elementsInList.hasNext();) {
				<WHAT IS IN THE LIST> element = (<WHAT IS IN THE LIST>) elementsInList.next();
				output.write(<GET/MAKE String thing from your element>);
			}
			
			
		} finally {
			if (output != null)
				output.close();
		}

Take care of exceptions in the code above as well ..