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我正在制作一个小程序，它根据 10 个随机整数显示 10 张卡片的随机集合。

我的想法是制作一个包含 52 张可显示卡片（不包括小丑）的数组，并根据这样的随机整数显示数组中的每张卡片（对不起，我不知道如何使用代码块）：

for (int i = 0; i<cards.length; i++) { //cards being my image array
     //code that displays each image
}

但是我在尝试将图像添加到数组中时遇到了麻烦，我也不知道如何显示数组中的图像。

我应该像这样添加它们：

Image[] cards = new Image[52];
cards[0] = c1;   //name of the Ace of Clubs, I had used getImage() to already get it

前面的语句抛出错误，说这是一个非法的开始。

合并图像后，我还需要帮助来显示图像，因为我不认为：

System.out.println(cards[x]);

将使用图像。

在此先感谢并抱歉看起来如此复杂，我已尝试尽可能地淡化它！

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1 回答 1

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所以，这是我的愚蠢看法......

在此处输入图像描述

public class RandomCards {
    public static void main(String[] args) {
        new RandomCards();
    }

    public RandomCards() {

        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {

                try {
                    JFrame frame = new JFrame();
                    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                    frame.setLayout(new BorderLayout());
                    frame.add(new RandomCardsPane());
                    frame.pack();
                    frame.setLocationRelativeTo(null);
                    frame.setVisible(true);
                } catch (Exception exp) {
                    exp.printStackTrace();
                }

            }

        });

    }

    public class RandomCardsPane extends JPanel {

        // A list is a collection of Image objects...
        private List<Image> cardList;
        private Image card = null;

        public RandomCardsPane() throws IOException {

            // My cards are stored in the default execution location of the program
            // and are named "Card_1.png" through "Card_51.png"...
            // You image loading process will be different, replace it here..

            // ArrayList is a dynamic list (meaning it can grow and shrink
            // over the life time of the list) and is backed by an array
            // which shouldn't concern you, the only thing you really need to
            // know is that it has excellent random access...
            cardList = new ArrayList<Image>(51);
            for (int index = 0; index < 51; index++) {
                cardList.add(ImageIO.read(new File("Card_" + index + ".png")));
            }

            addMouseListener(new MouseAdapter() {
                @Override
                public void mouseClicked(MouseEvent e) {
                    card = cardList.get(Math.min((int)Math.round(Math.random() * cardList.size()), 51));
                    repaint();
                }
            });
        }

        @Override
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);

            if (card != null) {
                int x = (getWidth() - card.getWidth(this)) / 2;
                int y = (getHeight() - card.getHeight(this)) / 2;
                g.drawImage(card, x, y, this);
            }
        }

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(225, 315);
        }
    }
}

我也更喜欢ImageIO甚至Toolkit.getImage，ImageIcon除了它保证在方法返回之前加载图像数据这一事实之外，它还支持更多的图像格式并且可以通过插件扩展......

于 2012-10-07T23:44:10.963 回答