Component size in SpringLayout

Question

I use SpringLayout on my form, But as you see, its look isn't good (large and bad size)!

public class t8 extends JFrame {

JButton okButton, cancellButton;
JTextField idTF, nameTf;
JLabel idlbl, namelbl;

public t8() {
    add(createPanel(), BorderLayout.CENTER);

    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(400, 500);
    setLocation(400, 100);
    setVisible(true);
}

public static void main(String[] args) {
    new t8();
}

public JPanel createPanel() {
    JPanel panel = new JPanel();
    okButton = new JButton("Ok");
    cancellButton = new JButton("Cancel");
    idTF = new JTextField(10);
    nameTf = new JTextField(10);
    idlbl = new JLabel("ID");
    namelbl = new JLabel("Name");
    panel.add(idlbl);
    panel.add(idTF);
    panel.add(namelbl);
    panel.add(nameTf);
    panel.add(okButton);
    panel.add(cancellButton);

    panel.setLayout(new SpringLayout());
    SpringUtilities.makeCompactGrid(panel, 3, 2, 20, 50, 50, 100);
    return panel;
}
}

I change makeCompactGrid numbers, But was not success!

(The width of JTextFields are large, and my button's size are different)

Answer 1

If you don't care about the layout manager, but only care about the layout, then you should use a GridLayout, or if you don't want all component to be the same size, a GridBagLayout. Here's how with a grid layout (only the modified method is shown):

public JPanel createPanel() {
    JPanel panel = new JPanel();
    panel.setLayout(new GridLayout());
    okButton = new JButton("Ok");
    cancellButton = new JButton("Cancel");
    idTF = new JTextField(10);
    nameTf = new JTextField(10);
    idlbl = new JLabel("ID");
    namelbl = new JLabel("Name");
    panel.add(idlbl);
    panel.add(idTF);
    panel.add(namelbl);
    panel.add(nameTf);
    panel.add(okButton);
    panel.add(cancellButton);
    return panel;
}

And with a GridBagLayout:

public JPanel createPanel() {
    JPanel panel = new JPanel();
    GridBagLayout gb = new GridBagLayout();
    GridBagConstraints gbc = new GridBagConstraints();
    panel.setLayout(gb);
    okButton = new JButton("Ok");
    cancellButton = new JButton("Cancel");
    idTF = new JTextField(10);
    nameTf = new JTextField(10);
    idlbl = new JLabel("ID");
    namelbl = new JLabel("Name");
    add(panel, idlbl, 0, 0, 1, 1, gb, gbc, false);
    add(panel, idTF, 0, 1, 1, 1, gb, gbc, true);
    add(panel, namelbl, 1, 0, 1, 1, gb, gbc, false);
    add(panel, nameTf, 1, 1, 1, 1, gb, gbc, true);
    add(panel, okButton, 2, 0, 1, 1, gb, gbc, false);
    add(panel, cancellButton, 2, 1, 1, 1, gb, gbc, true);
    return panel;
}

private void add(Container outer, Component c, int x, int y, int w, int h, GridBagLayout gb, GridBagConstraints gbc, boolean wide) {
    gbc.gridx = x;
    gbc.gridy = y;
    gbc.gridwidth = w;
    gbc.gridheight = h;
    if (wide) {
        gbc.weightx = 100;
    } else {
        gbc.weightx = 0;
    }
    gb.setConstraints(c, gbc);
    outer.add(c);
}

I believe that the extra GridBagLayout complexity just might be worth it.