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/*
Java Swing, 2nd Edition
By Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole
ISBN: 0-596-00408-7
Publisher: O'Reilly
*/
// FtfInputVerifier.java
//An example of using an InputVerifier with a formatted textfield.
//
import javax.swing.BorderFactory;
import javax.swing.InputVerifier;
import javax.swing.JComponent;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class FtfInputVerifier {
public static void main(String argv[]) {
java.net.URL u = null;
try {
u = new java.net.URL("http://www.ora.com/");
} catch (java.net.MalformedURLException ignored) {
}
// create two identical JFormattedTextFields
JFormattedTextField ftf1 = new JFormattedTextField(u);
JFormattedTextField ftf2 = new JFormattedTextField(u);
// and set an InputVerifier on one of them
ftf2.setInputVerifier(new InputVerifier() {
public boolean verify(JComponent input) {
if (!(input instanceof JFormattedTextField))
return true; // give up focus
return ((JFormattedTextField) input).isEditValid();
}
});
JPanel p = new JPanel(new java.awt.GridLayout(0, 2, 3, 8));
p.add(new JLabel("plain JFormattedTextField:", JLabel.RIGHT));
p.add(ftf1);
p.add(new JLabel("FTF with InputVerifier:", JLabel.RIGHT));
p.add(ftf2);
p.add(new JLabel("plain JTextField:", JLabel.RIGHT));
p.add(new JTextField(u.toString()));
p.setBorder(BorderFactory.createEmptyBorder(8, 8, 8, 8));
JFrame f = new JFrame("FtfInputVerifier");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(
new JLabel("Try to delete the colon in each field.",
JLabel.CENTER), java.awt.BorderLayout.NORTH);
f.getContentPane().add(p, java.awt.BorderLayout.CENTER);
f.pack();
f.setVisible(true);
}
}
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