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)

 
     
     
    