java - Spring布局中组件之间的空间太大

Question

我想手动创建一个 JFrame 并使用 spring 布局来执行此操作。但是，我的最终输出并不好。我的行与单选按钮之间的空间太大了:

我的代码:

public final class NewUserFrame1 extends JFrame {

public NewUserFrame1() {
    add(rowComponent(), BorderLayout.CENTER);
    setLocation(200, 40);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setResizable(false);
    setVisible(true);
    pack();
}

public JPanel rowComponent() {

    JPanel panel = new JPanel();
    JLabel fnamelbl = new JLabel("First name");
    JLabel lnamelbl = new JLabel("Last Name");
    JLabel fntemp = new JLabel();
    JLabel lntemp = new JLabel();
    JTextField fntf = new JTextField(10);
    JTextField lntf = new JTextField(10);
    JLabel gndlnl = new JLabel("Gender");
    JRadioButton malerb = new JRadioButton("Male");
    JRadioButton femalerb = new JRadioButton("Female");
    ButtonGroup bgroup = new ButtonGroup();
    bgroup.add(malerb);
    bgroup.add(femalerb);
    JLabel registnm = new JLabel("Registration ID is:");
    JLabel showreglbl = new JLabel();
    JLabel regtemp = new JLabel();

    panel.add(fnamelbl);
    panel.add(fntf);
    panel.add(fntemp);
    panel.add(lnamelbl);
    panel.add(lntf);
    panel.add(lntemp);
    panel.add(gndlnl);
    panel.add(malerb);
    panel.add(femalerb);
    panel.add(registnm);
    panel.add(showreglbl);
    panel.add(regtemp);

    panel.setLayout(new SpringLayout());
    SpringUtilities.makeCompactGrid(panel, 4, 3, 50, 15, 3, 4);
    return panel;
}

public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run() {
            NewUserFrame1 newUserFrame1 = new NewUserFrame1();
        }
    });
}
}

现在:

Answer 1

不是在 NewUserFrame1 构造函数中调用 setSize，而是调用 JFrame 上的 pack。

public NewUserFrame1() {
    add(rowComponent(), BorderLayout.CENTER);
    setLocation(200, 40);
    //setSize(800, 500);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setResizable(false);
    setVisible(true);
    pack();
}

同时更改 SpringUtilities.makeCompactGrid 方法的参数如下:

SpringUtilities.makeCompactGrid(panel, 4, 3, 50, 15, 3, 4);//change yPad to 4 instead of 100. It sets the vertical height between two rows