Question

我正在尝试创建一个刽子手游戏，到目前为止，它正在走向伟大，但布局设计似乎并没有到位！字母应该在Hangman图片顶部以FlowLayout顺序结束，底部有“重启”，“帮助”，“添加新单词”和“退出”按钮！我做错了什么？

hangman

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;

public class Hangman extends JFrame
{
    int i = 0;
    static JPanel panel;
    static JPanel panel2;
    static JPanel panel3;

    public Hangman()
    {
        JButton[] buttons = new JButton[26];

        panel = new JPanel(new FlowLayout());
        panel2 = new JPanel();
        panel3 = new JPanel();

        JButton btnRestart = new JButton("Restart");
        btnRestart.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e)
            {

            }
        });

        JButton btnNewWord = new JButton("Add New Word");
        btnNewWord.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e)
            {
                try
                {
                    FileWriter fw = new FileWriter("Words.txt", true);
                    PrintWriter pw = new PrintWriter(fw, true);

                    String word = JOptionPane.showInputDialog("Please enter a word: ");

                    pw.println(word);
                    pw.close();
                }
                catch(IOException ie)
                {
                    System.out.println("Error Thrown" + ie.getMessage());
                }
            }
        });

        JButton btnHelp = new JButton("Help");
        btnHelp.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e)
            {
                String message = "The word to guess is represented by a row "
                   + "of dashes, giving the number of letters and category of "
                   + "the word. \nIf the guessing player suggests a letter "
                   + "which occurs in the word, the other player writes it "
                   + "in all its correct positions. \nIf the suggested "
                   + "letter does not occur in the word, the other player "
                   + "draws one element of the hangman diagram as a tally mark."
                   + "\n"
                   + "\nThe game is over when:"
                   + "\nThe guessing player completes the word, or guesses "
                   + "the whole word correctly"
                   + "\nThe other player completes the diagram";
               JOptionPane.showMessageDialog(null,message, "Help",JOptionPane.INFORMATION_MESSAGE);
            }
        });

        JButton btnExit = new JButton("Exit");
        btnExit.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e)
            {
                System.exit(0);
            }
        });

        ImageIcon icon = new ImageIcon("D:\\Varsity College\\Prog212Assign1_10-013803\\images\\Hangman1.jpg");
        JLabel label = new JLabel();
        label.setIcon(icon);
        String  b[]=  {"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"};
        for(i = 0; i < buttons.length; i++)
        {
            buttons[i] = new JButton(b[i]);

            panel.add(buttons[i]);
        }
        panel2.add(label);

        panel3.add(btnRestart);
        panel3.add(btnNewWord);
        panel3.add(btnHelp);
        panel3.add(btnExit);
    }

    public static void main(String[] args) 
    {
        Hangman frame = new Hangman();
        frame.add(panel, BorderLayout.NORTH);
        frame.add(panel2, BorderLayout.CENTER);
        frame.add(panel3, BorderLayout.SOUTH);
        frame.pack();
        frame.setVisible(true);
    }
}

Answer 1

以下是一些建议：

enter image description here

使用GridLayout作为顶部面板;在这种情况下，零表示行数由指定的列数和布局中的组件总数确定：
```
JPanel north = new JPanel(new GridLayout(0, 9));
```

以下是如何使中心面板具有合理的初始尺寸的概述;请注意如何相对于当前大小绘制：

JPanel center = new JPanel() {

    private static final int N = 256;
    private static final String S = "Todo...";

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        int dx = (getWidth() - g.getFontMetrics().stringWidth(S)) / 2;
        int dy = getHeight() / 2;
        g.drawString(S, dx, dy);
    }

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

您可以构建如下按钮名称：

for (int i = 0; i < 26; i++) {
    String letter = String.valueOf((char) (i + 'A'));
    buttons[i] = new JButton(letter);
    north.add(buttons[i]);
}

制作小组instance variables，然后从event dispatch thread开始：

EventQueue.invokeLater(new Runnable() {

    @Override
    public void run() {
        Hangman frame = new Hangman();
        frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
        frame.add(frame.north, BorderLayout.NORTH);
        frame.add(frame.center, BorderLayout.CENTER);
        frame.add(frame.south, BorderLayout.SOUTH);
        frame.pack();
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
    }
});

Answer 2

如果你进行一些研究，这个问题就会被很好地记录下来 - 似乎所有面板（除了CENTER之外）在调整大小时都不会重新计算。请参阅How do I make this FlowLayout wrap within its JSplitPane?和http://www.velocityreviews.com/forums/t608472-wrap-flowlayout.html

但是要快速修复，请尝试将main方法更改为此...（基本上使用BoxLayout作为主要容器）

public static void main(String[] args) 
{
    TempProject frame = new TempProject();
    Box mainPanel = Box.createVerticalBox();
    frame.setContentPane(mainPanel);
    mainPanel.add(panel);
    mainPanel.add(panel2);
    mainPanel.add(panel3);
    frame.pack();
    frame.setVisible(true);
}

GridLayout上的FlowLayout无法正常工作

2 个答案: