import java.awt.BorderLayout;
import java.text.ParseException;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.TitledBorder;
import javax.swing.text.DefaultFormatterFactory;
import javax.swing.text.MaskFormatter;
public class MainClass {
public static JPanel demo1() {
JPanel pan = new JPanel(new BorderLayout());
pan.setBorder(new TitledBorder("Demo 1: format toggles with focus"));
MaskFormatter withFocus = null, withoutFocus = null;
try {
withFocus = new MaskFormatter("LLLL");
withoutFocus = new MaskFormatter("UUUU");
} catch (ParseException pe) {
}
DefaultFormatterFactory factory = new DefaultFormatterFactory(withoutFocus, null, withFocus);
JFormattedTextField field = new JFormattedTextField(factory);
field.setValue("Four");
pan.add(field, BorderLayout.CENTER);
return pan;
}
public static void main(String argv[]) {
JFrame f = new JFrame("FactoryDemo");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(demo1(), BorderLayout.NORTH);
f.getContentPane().add(new JTextField(), BorderLayout.SOUTH);
f.setSize(240, 160);
f.setVisible(true);
}
}