为什么我的Swing JButton奇数尺寸？

Question

我正在尝试为类似于"谁想要成为百万富翁"的游戏创建一个界面,但我对布局没有运气.

我最近尝试的代码:

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


public class GameGUI extends JFrame //implements ActionListener
{
    Container contentPane = getContentPane();
    JPanel pnl = new JPanel(new GridBagLayout());
    GridBagConstraints c = new GridBagConstraints();

    JButton btnQuestion = new JButton();
    JButton btnAnsA = new JButton();
    JButton btnAnsB = new JButton();
    JButton btnAnsC = new JButton();
    JButton btnAnsD = new JButton();

    Color customDarkGrey = new Color(20, 20, 20);

    public GameGUI()
    {
        super("Game");
        setExtendedState(JFrame.MAXIMIZED_BOTH);
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        contentPane.setBackground(customDarkGrey);
        contentPane.add(pnl); pnl.setOpaque(false);

        c.fill = GridBagConstraints.HORIZONTAL;
        c.weightx = 0.5;
        c.gridx = 0;
        c.gridy = 0;
        pnl.add(btnQuestion, c);

        c.fill = GridBagConstraints.HORIZONTAL;
        c.weightx = 0.5;
        c.weighty = 0.5;
        c.ipadx = 40;
        c.gridx = 1;
        c.gridy = 0;
        pnl.add(btnAnsA, c);

        c.fill = GridBagConstraints.HORIZONTAL;
        c.weightx = 0.0;
        c.gridx = 0;
        c.gridy = 1;
        pnl.add(btnAnsA, c);

        setVisible(true);
    }
}

显示这个:

中间和顶部的条带都是按钮

我尝试过使用其他布局,但每次按钮看起来太小而无法按预期使用.

任何人都可以建议布局的组合,以实现所需的布局(中心的问题和2x2网格中的4个答案选择)？

注意:我对stackoverflow完全不熟悉(不像我说的那么明显或任何东西).我无法对帖子或其他评论发表评论,因为我没有任何声誉,所以我尽力与你沟通-user1803551-这是我能看到如何通过编辑的唯一方式.建议别的东西,我会坚持这一点,但在那之前,如果你停止恢复这个帖子,我会很感激.

Answer 1

在你的代码只添加btnQuestion和btnAnsA,所以难怪被不起作用.

无论如何,我用你最初的GridBagLayout方法.

• 问题按钮的宽度为2,因此它将适当地跨越.
• 我添加了任意插图,但这取决于你自己.
• 你没有指定明确的调整大小行为,我给了一个任意的.

public class GameGUI extends JFrame {

    JButton btnQuestion = new JButton("This is the Question");
    JButton btnAnsA = new JButton("This is answer A");
    JButton btnAnsB = new JButton("This is answer B");
    JButton btnAnsC = new JButton("This is answer C");
    JButton btnAnsD = new JButton("This is answer D");

    public GameGUI() {

        super("Game");

        JPanel pnl = new JPanel(new GridBagLayout());
        GridBagConstraints c = new GridBagConstraints();
        getContentPane().add(pnl);

        c.weightx = 0.5;
        c.weighty = 0.5;
        c.insets = new Insets(5, 5, 5, 5);
        c.fill = GridBagConstraints.HORIZONTAL;

        c.gridx = 0;
        c.gridy = 0;
        c.gridwidth = 2;
        pnl.add(btnQuestion, c);

        c.gridwidth = 1;
        c.gridx = 0;
        c.gridy = 1;
        pnl.add(btnAnsA, c);

        c.gridx = 1;
        c.gridy = 1;
        pnl.add(btnAnsB, c);

        c.gridx = 0;
        c.gridy = 2;
        pnl.add(btnAnsC, c);

        c.gridx = 1;
        c.gridy = 2;
        pnl.add(btnAnsD, c);

        setDefaultCloseOperation(EXIT_ON_CLOSE);
        pack();
        setVisible(true);
    }

    public static void main(String[] args) {

        SwingUtilities.invokeLater(() -> new GameGUI());
    }
}

如果你不想搞乱GBL,复合布局方法将非常简单(可以根据要求进行演示).