BoxLayout 中的 JLabel 和 JButton 居中

Question

我是 Java 编程的新手，无法处理我的 Swing 问题。我无法让 JButtons 和 JLabels 在 JPanels(BoxLayout) 中居中。

这是一些照片：

代码：

        PlayerLabel.setHorizontalTextPosition(JLabel.CENTER);
        PlayerLabel.setVerticalTextPosition(JLabel.BOTTOM);
        PlayerLabel.setText("Player Level: " + CarMain.main[5]);

    AccessoriesLVL1Label.setHorizontalTextPosition(JLabel.CENTER);
    AccessoriesLVL1Label.setVerticalTextPosition(JLabel.BOTTOM);
    AccessoriesLVL1Label.setText("<html>Accessories LVL 1<br>" + "Count: " + Part.parts[1]);

JButton jbtnSellAccessoriesLv1 = new JButton("Sell");
jbtnSellAccessoriesLv1.addActionListener(this);

这就是我制作 Jlabel 的地方：

//升级面板

GridLayout UpgradesLayout = new GridLayout(3,3);
        JPanel UpgradesPanel = new JPanel();
        UpgradesPanel.setLayout(UpgradesLayout);

        JPanel UpgradesPanelSub = new JPanel();
        UpgradesPanelSub.setLayout(new BoxLayout(UpgradesPanelSub, BoxLayout.PAGE_AXIS));
        UpgradesPanelSub.setBorder(BorderFactory.createCompoundBorder(raisedbevel, loweredbevel));

        JPanel UpgradesPanelSub2 = new JPanel();
        UpgradesPanelSub2.setLayout(new BoxLayout(UpgradesPanelSub2, BoxLayout.PAGE_AXIS));
        UpgradesPanelSub2.setBorder(BorderFactory.createCompoundBorder(raisedbevel, loweredbevel));

        JPanel UpgradesPanelSub3 = new JPanel();
        UpgradesPanelSub3.setLayout(new BoxLayout(UpgradesPanelSub3, BoxLayout.PAGE_AXIS));
        UpgradesPanelSub3.setBorder(BorderFactory.createCompoundBorder(raisedbevel, loweredbevel));

        UpgradesPanelSub.add(Labels.PlayerLabel);
        UpgradesPanelSub.add(jbtnUpgradeLevel);
        UpgradesPanelSub2.add(Labels.GarageLabel);
        UpgradesPanelSub2.add(jbtnUpgradeGarageLevel);
        UpgradesPanelSub3.add(Labels.BoxesLVLLabel);
        UpgradesPanelSub3.add(jbtnUpgradeBoxesLevel);

        UpgradesPanel.add(new JLabel(""));
        UpgradesPanel.add(new JLabel(""));
        UpgradesPanel.add(new JLabel(""));
        UpgradesPanel.add(UpgradesPanelSub);
        UpgradesPanel.add(UpgradesPanelSub2);
        UpgradesPanel.add(UpgradesPanelSub3);
        UpgradesPanel.add(new JLabel(""));
        UpgradesPanel.add(new JLabel(""));
        UpgradesPanel.add(new JLabel(""));

Answer 1

关于布局问题：有一个关于如何使用盒子布局的教程（寻找组件的对齐方式以使它们居中）：docs.oracle.com/javase/tutorial/uiswing/layout/box.html。

或者，您可以使用一种外部布局管理器，例如 MigLayout，IMO 更易于使用。

BoxLayout 中的 JLabel 和 JButton 居中

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