java - 如何将 Netbeans Java 应用程序对象更改为 "right to left"

Question

我需要在框架上从“右到左”显示对象吗？

C# 中的相同程序
这就是我想要的对象的样子

请帮助我:)
谢谢

Answer 1

尝试通过为每个要在其中使用阿拉伯语的组件调用 setComponentOrientation() 方法来更改组件方向，对于组合框，您应该覆盖其单元格渲染器以支持从右到左显示，请尝试以下操作代码:

public class Test extends JFrame
{
    public static void main(String[] args)
    {
        SwingUtilities.invokeLater(new Runnable(){
            public void run()
            {
                try
                {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                }
                catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException e)
                {
                    e.printStackTrace();
                }
                new Test();
            }
        });
    }

    public Test()
    {
        setBounds(100,100,380,400);
        setTitle("بوابة العالم");
        getContentPane().setLayout(new FlowLayout(FlowLayout.RIGHT));
        JComboBox<String> comboBox = new JComboBox<String>(new String[]{"التاريخ","الفلسفة","الفلك"});
        comboBox.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        comboBox.setPreferredSize(new Dimension(300,comboBox.getPreferredSize().height));
        comboBox.setRenderer(new CellRenderer());
        add(comboBox);

        JTextPane textPane = new JTextPane();
        textPane.setPreferredSize(new Dimension(300, 300));
        textPane.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        JScrollPane scroll = new JScrollPane(textPane);
        scroll.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        add(scroll);

        setVisible(true);
    }

}

class CellRenderer implements ListCellRenderer<String>
{
    @Override
    public Component getListCellRendererComponent(JList<? extends String> list, String value, int index, boolean isSelected, boolean cellHasFocus)
    {
        JLabel label = new JLabel(value);
        label.setOpaque(true);
        label.setFocusable(true);
        label.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        if (isSelected) {
            label.setBackground(list.getSelectionBackground());
            label.setForeground(list.getSelectionForeground());
        } else {
            label.setBackground(list.getBackground());
            label.setForeground(list.getForeground());
        }
        return label;
    }
}

结果:

对于标题栏方向，如果您使用标题栏的主机外观，它对您不起作用，但如果您调用 JFrame.setDefaultLookAndFeelDecorated(true) 则它会起作用，然后您的应用程序将使用提供的外观而不是主机外观，接下来您应该在框架上调用 setComponentOrientation() 方法来指定所需的方向，尝试使用此代码激活标题栏的从右到左:

public class Test extends JFrame
{
    public static void main(String[] args)
    {
        SwingUtilities.invokeLater(new Runnable(){
            public void run()
            {
                JFrame.setDefaultLookAndFeelDecorated(true);  
                new Test();
            }
        });
    }

    public Test()
    {
        setBounds(100,100,380,400);
        setTitle("بوابة العالم");
        setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        getContentPane().setLayout(new FlowLayout(FlowLayout.RIGHT));
        JComboBox<String> comboBox = new JComboBox<String>(new String[]{"التاريخ","الفلسفة","الفلك"});
        comboBox.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        comboBox.setPreferredSize(new Dimension(300,comboBox.getPreferredSize().height));
        comboBox.setRenderer(new CellRenderer());
        add(comboBox);

        JTextPane textPane = new JTextPane();
        textPane.setPreferredSize(new Dimension(300, 300));
        textPane.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        JScrollPane scroll = new JScrollPane(textPane);
        scroll.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        add(scroll);

        setVisible(true);
    }

}

class CellRenderer implements ListCellRenderer<String>
{
    @Override
    public Component getListCellRendererComponent(JList<? extends String> list, String value, int index, boolean isSelected, boolean cellHasFocus)
    {
        JLabel label = new JLabel(value);
        label.setOpaque(true);
        label.setFocusable(true);
        label.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        if (isSelected) {
            label.setBackground(list.getSelectionBackground());
            label.setForeground(list.getSelectionForeground());
        } else {
            label.setBackground(list.getBackground());
            label.setForeground(list.getForeground());
        }
        return label;
    }
}

结果:

注意:

• 不要忘记使用 UTF-8 编码保存源文件以支持阿拉伯字符。
• JFrame.setDefaultLookAndFeelDecorated(true) 必须在创建任何框架实例之前调用。