Question

我有一个指定了FlowLayout的面板，其中包含标签，文本字段和文本区域。框架不是那么宽，但由于里面的所有组件，面板变得很高。我想将面板添加到JScrollPane，因此我可以在面板中垂直滚动。但是，当我将面板添加到滚动窗格并将滚动窗格添加到框架时，所有组件都是彼此相邻的，并且它会水平滚动通过它们。这是代码：

public class Form {

    JTextField jtfName = new JTextField(15);
    JTextField jtfTitle = new JTextField(15);
    JTextField jtfAuthor = new JTextField(15);

    JTextArea jtaSetting = new JTextArea(5, 15);
    JTextArea jtaMainChars = new JTextArea(5, 15);
    JTextArea jtaConflict = new JTextArea(5, 15);
    JTextArea jtaQuote = new JTextArea(5, 15);
    JTextArea jtaMainCharShows = new JTextArea(5, 15);

    JPanel jpnlName = new JPanel();
    JPanel jpnlTitle = new JPanel();
    JPanel jpnlAuthor = new JPanel();

    Form() {

        // Create a new JFrame container.
        JFrame jfrm = new JFrame("Organizer");

        jfrm.setLayout(new GridLayout(0,1));

        // Give the frame an initial size.
        jfrm.setSize(300, 300);

        // Terminate the program when the user closes the application.
        jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // Create a panel.
        JPanel jpnl = new JPanel();

        // Create labels.
        JLabel jlabName = new JLabel("Student Name:");
        JLabel jlabTitle = new JLabel("Title:");
        JLabel jlabAuthor = new JLabel("Author:");

        JLabel jlabSetting = new JLabel("Setting (Time and Place):");
        jlabSetting.setHorizontalAlignment(SwingUtilities.CENTER);

        JLabel jlabMainChars = new JLabel("Main Characters:");
        jlabMainChars.setHorizontalAlignment(SwingUtilities.CENTER);

        JLabel jlabConflict = new JLabel("<html>Describe the major conflict of the<br>story in one well-written sentence:");
        jlabConflict.setHorizontalAlignment(SwingUtilities.CENTER);

        JLabel jlabQuote = new JLabel("<html>Find and write down a passage (quote<br>from the book that reveals a significant<br>personality trait of one of the main characters<br>and GIVE THE PAGE #:");
        jlabQuote.setHorizontalAlignment(SwingUtilities.CENTER);

        JLabel jlabMainCharShows = new JLabel("<html>Explain in your own words what the<br>passage (quote) shows about the main character.");
        jlabMainCharShows.setHorizontalAlignment(SwingUtilities.CENTER);

        // Add text fields to panel.
        jpnlName.add(jlabName);
        jpnlName.add(jtfName);

        jpnlTitle.add(jlabTitle);
        jpnlTitle.add(jtfTitle);

        jpnlAuthor.add(jlabAuthor);
        jpnlAuthor.add(jtfAuthor);

        // Add components to main panel.
        jpnl.add(jpnlName);
        jpnl.add(jpnlTitle);
        jpnl.add(jpnlAuthor);
        jpnl.add(jlabSetting);
        jpnl.add(jtaSetting);
        jpnl.add(jlabMainChars);
        jpnl.add(jtaMainChars);
        jpnl.add(jlabConflict);
        jpnl.add(jtaConflict);
        jpnl.add(jlabQuote);
        jpnl.add(jtaQuote);
        jpnl.add(jlabMainCharShows);
        jpnl.add(jtaMainCharShows);

        // Add the panel to a scroll pane.
        JScrollPane jspPanel = new JScrollPane(jpnl);

        // Add the scroll pane to the frame.
        jfrm.getContentPane().add(jspPanel);

        // Display the frame.
        jfrm.setVisible(true);
    }
}

Answer 1

如果不确切知道您想要的布局，我建议的最佳解决方案是尝试WrapLayout

它解决了FlowLayout的主要问题，它没有包装。

Answer 2

你为什么不试试BoxLayout：

jpnl.setLayout(new BoxLayout(jpnl, BoxLayout.PAGE_AXIS));

JScrollPane在应该垂直滚动时水平滚动

2 个答案: