JFormattedTextField

public class MyForm extends JFrame {

    public MyForm() {

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        setBounds(100, 100, 362, 249);

        setTitle("Kittisay Java");

        setLayout(null);

        // Format

        MaskFormatter mask = null;

        try {

            mask = new MaskFormatter("###-####-###");

        } catch (ParseException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        // Formatted TextField

        JFormattedTextField fmField = new JFormattedTextField(mask);

        fmField.setBounds(125, 87, 90, 20);

        add(fmField);

    }

    public static void main(String[] args) {

      MyForm frm = new MyForm();

      frm.setVisible(true);

    }