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import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JFrame;
import javax.swing.JTextField;
class MyKeyListener implements KeyListener {
public void keyTyped(KeyEvent e) {
char c = e.getKeyChar();
System.out.println("Key Typed: " + c);
}
public void keyPressed(KeyEvent e) {
char c = e.getKeyChar();
System.out.println("Key Pressed: " + c);
}
public void keyReleased(KeyEvent e) {
char c = e.getKeyChar();
System.out.println("Key Released: " + c);
}
}
public class KeyListenerDemo {
public static void main(String[] a) {
JFrame frame = new JFrame("Popup JComboBox");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTextField textField = new JTextField();
textField.addKeyListener(new MyKeyListener());
frame.add(textField);
frame.setSize(300, 200);
frame.setVisible(true);
}
}
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