FactoryDemo.java Source code

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Here is the source code for FactoryDemo.java

Source

/*
Java Swing, 2nd Edition
By Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole
ISBN: 0-596-00408-7
Publisher: O'Reilly 
*/
// FactoryDemo.java
//Demo 1: field with different formats with focus and without.<br>
//Demo 2: Change the format of a field when the user presses a button.
//

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.ParseException;

import javax.swing.JButton;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.TitledBorder;
import javax.swing.text.DefaultFormatterFactory;
import javax.swing.text.MaskFormatter;

public class FactoryDemo {

    public static JPanel demo1() {
        // Demo 1: field with different formats with focus and without

        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 JPanel demo2() {
        // Demo 2: Change the format of a field when the user presses a button.
        // We can't call field.setFormatter() because that's a protected method.
        // (Plus it wouldn't work anyway. The old factory would replace our new
        // formatter with an "old" one next time the field gains or loses
        // focus.)
        // The thing to do is send a new factory to field.setFormatterFactory().

        JPanel pan = new JPanel(new BorderLayout());
        pan.setBorder(new TitledBorder("Demo 2: change format midstream"));

        MaskFormatter lowercase = null;
        try {
            lowercase = new MaskFormatter("LLLL");
        } catch (ParseException pe) {
        }
        final JFormattedTextField field = new JFormattedTextField(lowercase);
        field.setValue("Fore");
        pan.add(field, BorderLayout.CENTER);

        final JButton change = new JButton("change format");
        JPanel changePanel = new JPanel();
        changePanel.add(change);
        pan.add(changePanel, BorderLayout.SOUTH);

        change.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent ae) {
                try {
                    field.commitEdit(); // commit current edit (if any)
                    MaskFormatter uppercase = new MaskFormatter("UUUU");
                    DefaultFormatterFactory factory = new DefaultFormatterFactory(uppercase);
                    field.setFormatterFactory(factory);
                    change.setEnabled(false);
                } catch (ParseException pe) {
                }
            }
        });

        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(demo2(), BorderLayout.SOUTH);
        f.setSize(240, 160);
        f.setVisible(true);
    }
}