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import java.awt.*;
import java.util.*;
import java.awt.event.*;
import javax.swing.*;
// This program demonstrates the use of the Swing InputVerifier class.
// It creates two text fields; the first of the text fields expects the
// string "pass" as input, and will allow focus to advance out of it
// only after that string is typed in by the user.
// Author: SUN Microsystems, API-Doc: Java 2 Platform SE v1.4.2 (2003)
// modified by R. Mayer
public class VerifierTest extends JFrame {
public VerifierTest() {
JTextField tf1 = new JTextField ("Gib hier \"FHD-FbI\" ein");
getContentPane().add (tf1, BorderLayout.NORTH);
tf1.setInputVerifier(new PassVerifier());
JTextField tf2 = new JTextField ("... hier weitere Eingabe");
getContentPane().add (tf2, BorderLayout.SOUTH);
WindowListener l = new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
};
addWindowListener(l);
}
class PassVerifier extends InputVerifier {
public boolean verify(JComponent input) {
JTextField tf = (JTextField) input;
boolean test = "FHD-FbI".equals(tf.getText());
if (!test)
Toolkit.getDefaultToolkit().beep();
return test;
}
}
public static void main(String[] args) {
Frame f = new VerifierTest();
f.pack();
f.setVisible(true);
}
}
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