我創造和小行星射擊遊戲,只在某些情況下它崩潰刪除對象,我得到這個錯誤時:IllegalStateException異常使用ArrayList和迭代器
07-16 19:35:05.071: ERROR/AndroidRuntime(3553): FATAL EXCEPTION: Thread-11
07-16 19:35:05.071: ERROR/AndroidRuntime(3553): java.lang.IllegalStateException
07-16 19:35:05.071: ERROR/AndroidRuntime(3553): at java.util.AbstractList$SimpleListIterator.remove(AbstractList.java:69)
這是測試對於鏡頭之間碰撞的代碼和小行星:
public void shotAstrCollision(){
asterItr = asteroids.listIterator();
while(asterItr.hasNext()){
aster = asterItr.next();
shotItr = shots.listIterator();
while(shotItr.hasNext()){
shot = shotItr.next();
float shotToAst = (float) Math.sqrt((aster.x + astW/2 - shot.x)*(aster.x + astW/2 - shot.x) + (aster.y + astH/2 - shot.y)*(aster.y + astH/2 - shot.y));
if (shotToAst < astW/2){
//asteroid is shot
aster.power -= shot.power;
shotItr.remove();
shotCount--;
createExplosion(aster.x + astW/2, aster.y + astH/2);
SoundManager.playSound(1, 1);
if (aster.power <= 0) {
asterItr.remove();
astCount--;
}else{
aster.shotColor = ASTEROID_SHOT_PAINT_FRAMES;
}
}
}
}
}
你知道在哪裏尋找這個錯誤的可能原因嗎?
您正在調用'remove()'到兩個不同的迭代器上:'shotItr'和後來的'asterItr'。哪一行會拋出'IllegalStateException'? –