Java破砖游戏-“需要数组，但找到Java.util.List”

Question

public void createGameObjects()
{
 synchronized( Model.class )
 {
   ball   = new GameObj(W/2, H/2, BALL_SIZE, BALL_SIZE, Colour.RED );
   bat    = new GameObj(W/2, H - BRICK_HEIGHT*1.5f, BRICK_WIDTH*3, 
                                   BRICK_HEIGHT/4, Colour.GRAY);
   bricks = new ArrayList<>();
   bricks[0] = new GameObj(0,0, BRICK_HEIGHT, BRICK_WIDTH, Colour.BLUE);
 }
}

错误发生在底线：

bricks[0] = new GameObj(0,0, BRICK_HEIGHT, BRICK_WIDTH, Colour.BLUE);

谢谢。

Answer 1

您正在将bricks作为ArrayList删除，并试图以Array的方式访问元素，因此出现了错误。尝试更改以下内容：

bricks = new ArrayList<>();
bricks[0] = new GameObj(0,0, BRICK_HEIGHT, BRICK_WIDTH, Colour.BLUE);

到

bricks = new ArrayList<>();
bricks.add(new GameObj(0,0, BRICK_HEIGHT, BRICK_WIDTH, Colour.BLUE));

这将在ArrayList中添加元素。