java - 在 Java GUI 中为每个字段插入一个新行

Question

我正在用 Java 开发 GUI。我不知道如何为每个字段插入新行。有人能帮我解决这个问题吗？这是我的代码:

public class InsertPanel extends JPanel{
    public InsertPanel() {
        setBackground(Color.yellow);
        setPreferredSize(new Dimension(540, 500));

        JLabel isbnLabel = new JLabel("ISBN: ");
        JTextField isbnTextFld = new JTextField(10);

        JLabel authorLabel = new JLabel("Author: ");
        JTextField authorTextFld = new JTextField(10);  

        JLabel titleLabel = new JLabel("Title: ");
        JTextField titleTextFld = new JTextField(10);

        JLabel priceLabel = new JLabel("Price: ");
        JTextField priceTextFld = new JTextField(10);

        JButton submitBtn = new JButton("Submit");

        JTextArea textArea = new JTextArea(10, 30);

        add(isbnLabel);
        add(isbnTextFld);
        add(authorLabel);
        add(authorTextFld);
        add(titleLabel);
        add(titleTextFld);
        add(priceLabel);
        add(priceTextFld);
        add(submitBtn);
        add(textArea, BorderLayout.CENTER);
    }
}

输出中的这些字段位于同一行。我希望他们看起来像

国际标准书号:

作者:

标题:

价格:

提交

文本区域:

非常感谢!

Answer 1

考虑使用GridBagLayout

也许像...

public class InsertPanel extends JPanel {

    public InsertPanel() {
        setBackground(Color.yellow);

        setLayout(new GridBagLayout());

        JLabel isbnLabel = new JLabel("ISBN: ");
        JTextField isbnTextFld = new JTextField(10);

        JLabel authorLabel = new JLabel("Author: ");
        JTextField authorTextFld = new JTextField(10);

        JLabel titleLabel = new JLabel("Title: ");
        JTextField titleTextFld = new JTextField(10);

        JLabel priceLabel = new JLabel("Price: ");
        JTextField priceTextFld = new JTextField(10);

        JButton submitBtn = new JButton("Submit");

        JTextArea textArea = new JTextArea(10, 30);

        GridBagConstraints gbc = new GridBagConstraints();
        gbc.gridx = 0;
        gbc.gridy = 0;

        add(isbnLabel, gbc);
        gbc.gridy++;
        add(authorLabel, gbc);
        gbc.gridy++;
        add(titleLabel, gbc);
        gbc.gridy++;
        add(priceLabel, gbc);

        gbc.gridx++;
        gbc.gridy = 0;
        add(isbnTextFld, gbc);
        gbc.gridy++;
        add(authorTextFld, gbc);
        gbc.gridy++;
        add(titleTextFld, gbc);
        gbc.gridy++;
        add(priceTextFld, gbc);
        gbc.gridy++;
        add(submitBtn, gbc);

        gbc.gridx++;
        gbc.gridy = 0;
        gbc.gridheight = gbc.REMAINDER;
        add(new JScrollPane(textArea), gbc);
    }

}

参见How to Use GridBagLayout了解更多详情