问添加到JLabel时，无法在JPanel中左对齐BorderLayout

EN

public static void addComponentsToPane(Container pane) 
    {
        JLabel jlabel = new JLabel("I want to left align this inside a JPanel");
        // Doesn't work: jlabel.setAlignmentX(Component.LEFT_ALIGNMENT);
        JPanel jpanel = new JPanel();
        //Doesn't work: jlabel.setAlignmentX(Component.LEFT_ALIGNMENT);
        jpanel.add(jlabel);
        pane.add(jpanel, BorderLayout.PAGE_START);

        // Other parts of the BoxLayout (works fine)
        JButton button = new JButton("Button 2 (CENTER)");
        button.setPreferredSize(new Dimension(200, 100));
        pane.add(button, BorderLayout.CENTER);

        button = new JButton("Button 3 (LINE_START)");
        pane.add(button, BorderLayout.LINE_START);

        button = new JButton("Long-Named Button 4 (PAGE_END)");
        pane.add(button, BorderLayout.PAGE_END);

        button = new JButton("5 (LINE_END)");
        pane.add(button, BorderLayout.LINE_END);
    }