java - 在结束方法之前等到单击 JButton

Question

我正在编写一个井字游戏，该游戏在玩家（用户点击按钮）和计算机玩家之间轮流。

我有一个调用的方法playersTurn()，它需要等到JButton在方法结束之前单击 a 并且计算机播放器轮到它。我已阅读有关使用线程和wait - notify方法的信息，但我是 Java 新手，不知道如何实现这一点。

我想知道是否有更简单的方法来克服这个问题，或者这是唯一的方法，如果是这样，有人可以指导我找到一个好的教程吗？

谢谢

Answer 1

正如@HFOE 所说（对他+1），您不想将Threads 与notify一起使用并等待，这确实使事情变得过于复杂您的游戏逻辑在 IMO 上是有偏差的。

在开始游戏之前先制定一些框架：

• 9JButton秒（阵列将按住按钮）
• JPanel用 aGridLayout(3,3)创建井字游戏网格

现在是重要的部分：

• 玩家开始游戏，然后计算机继续运行，依此类推

考虑到上述内容，请参阅我的示例，我所做的基础是在播放器离开后（单击按钮并设置播放ActionListener器符号）后用于每个按钮的内部，我们调用cpu播放的方法：

import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Random;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;

public class Test {
    //declare variables for player and cpu symbol

    private String playerSymbol = "X";
    private String cpuSymbol = "O";
    //used for cpu to select random block
    private Random r = new Random();
    //create arraylist to hold buttons
    ArrayList<JButton> blocks = new ArrayList<>();
    //this is the action listner that will be added to each block and will allow player the first turn then cpu goes
    private ActionListener al = new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent ae) {

            //players turn
            playerTurn(ae);

            //check for win after player gone
            checkForWin();

            //cpu turn
            cpuTurn();

            //check for a win after cpu goes
            checkForWin();
        }

        private void cpuTurn() {
            System.out.println("CPU goes");
            while (true) {
                int blockNumber = r.nextInt(9);

                System.out.println(blockNumber + "");
                String tmp = blocks.get(blockNumber).getText();

                if (tmp.equals("")) {
                    blocks.get(blockNumber).setText(cpuSymbol);
                    break;
                }
            }
        }

        private void checkForWin() {
            System.out.println("Checking for a win...");
        }

        private void playerTurn(ActionEvent ae) {
            System.out.println("Player goes");
            JButton block = (JButton) ae.getSource();
            block.setText(playerSymbol);
        }
    };

    public Test() {
        initComponents();
    }

    private void initComponents() {
        JFrame frame = new JFrame("Test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel board = new JPanel(new GridLayout(3, 3));//create gridlayput to hold buttons

        //create blocks/Jbuttons to hold X and Y
        createBlocks(blocks);
        //add buttons/blocks to the board
        fillBoard(blocks, board);
        //add board to JFrame content pane
        frame.add(board);

        frame.pack();
        frame.setVisible(true);
    }

    private void fillBoard(ArrayList<JButton> blocks, JPanel board) {
        for (JButton block : blocks) {
            board.add(block);
        }
    }

    private void createBlocks(ArrayList<JButton> blocks) {
        for (int i = 0; i < 9; i++) {

            //create new button with a size of 50,50
            JButton block = new JButton() {
                @Override
                public Dimension getPreferredSize() {
                    return new Dimension(50, 50);
                }
            };
            block.addActionListener(al);//add the actionlistner to the button
            blocks.add(block);
        }
    }

    public static void main(String[] args) {
        //set L&F and create UI on EDT
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {

                try {//set L&F
                    for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
                        if ("Nimbus".equals(info.getName())) {
                            UIManager.setLookAndFeel(info.getClassName());
                            break;
                        }
                    }
                } catch (Exception e) {
                    // If Nimbus is not available, you can set the GUI to another look and feel.
                }

                //create UI
                new Test();
            }
        });
    }
}

Answer 2

你不应该等待并测试发生了什么，正确的方法是将监听器设置为按钮，例如在按钮单击后更改活动播放器。但是一切都取决于您的代码实施。