I have a program for my college final that I am having issues with, I have so far that on a key press, it should begin to read from a txt file for location information about birds and where to place them in the world, however when I press the key, I get a null error and a seperate error window pops up and simply repeats some method returns I have that state the birds health and infection count. if anybody knows what I have wrong please let me know. Below are the image of the error window and code I have that I believe to be in question.
public void act() { if(Greenfoot.isKeyDown("l")){ FileDialog gui = null; gui = new FileDialog(gui, "select a bird file", FileDialog.LOAD); gui.setVisible(true); String fname = gui.getDirectory() + gui.getFile(); File f = new File(fname); Scanner fread; try{ fread = new Scanner(f); } catch(FileNotFoundException e){ System.out.print("Error: " + fname); gui.dispose(); return; } while(fread.hasNext()) { String word = fread.next(); if(word.equalsIgnoreCase("bird")) { addObject(new Bird(fread.nextInt()), fread.nextInt(), fread.nextInt()); } else if(word.equalsIgnoreCase("distance")) { Bird.setSocialDistance(fread.nextInt()); } else if(word.charAt(0) == '*') { fread.nextLine(); } else { System.out.println("error, unknown token: " + word); } } }