private int testForCollision(Sprite testSprite) {
// Check for collision with other
// sprites
Sprite sprite;
for (int cnt = 0; cnt < size(); cnt++) {
sprite = (Sprite) elementAt(cnt);
if (sprite == testSprite)
// don't check self
continue;
// Invoke testCollision method
// of Sprite class to perform
// the actual test.
if (testSprite.testCollision(sprite))
// Return index of colliding
// sprite
return cnt;
} // end for loop
return -1; // No collision detected
} // end testForCollision()
