Why can't Java resolve the variable in this for each loop? -

in following each loop, "bird cannot resolved" error @ lines marked !. have setup interface bird implemented abstract class birdtype of cardinal, hummingbird, bluebird, , vulture children. getcolor() , getposition() methods defined in abstract class while fly() unique each of child classes. client code provided professor test interface/inheritance relations have setup. note have tested interface, abstract class , child classes , seem work. think issue for-each loop can provide code other classes if needs be. advice?

import java.awt.*; public class aviary {     public static final int size = 20;     public static final int pixels = 10;      public static void main(string[] args){         //create drawing panel         drawingpanel panel = new drawingpanel(size*pixels,size*pixels);         //create pen         graphics g = panel.getgraphics();          //create birds         bird[] birds = {new cardinal(7,4), new cardinal(3,8),             new hummingbird(2,9), new hummingbird(16,11),             new bluebird(4,15), new bluebird(8,1),             new vulture(3,2), new vulture(18,14)};          while (true){             //clear screen             g.setcolor(color.white);             g.fillrect(0, 0, size*pixels, size*pixels);              //tell birds fly , redraw birds             (bird bird : birds)                  bird.fly(); !               g.setcolor(bird.getcolor()); !               point pos = bird.getposition();                 g.filloval((int)pos.getx()*pixels, (int)pos.gety()*pixels,                     pixels, pixels);                 panel.sleep(500);         }     } } 

you need wrap body want executed in for loop in braces

for (bird bird : birds) {     bird.fly();     g.setcolor(bird.getcolor());     point pos = bird.getposition();     g.filloval((int)pos.getx()*pixels, (int)pos.gety()*pixels,     pixels, pixels);     panel.sleep(500); } 

otherwise, body of for loop next statement following ). equivalent to

for (bird bird : birds)      bird.fly();  // bird not in scope anymore g.setcolor(bird.getcolor()); point pos = bird.getposition(); g.filloval((int)pos.getx()*pixels, (int)pos.gety()*pixels, pixels, pixels); panel.sleep(500); 

as darien has said in comments, indentation not part of java language, has no bearing on syntax. should use make code easier read, expressed in java code style conventions.