Demonstrates key events : KeyListener « Swing Event « Java Tutorial

1. Java Tutorial
2. Swing Event
3. KeyListener

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);
  }

}

15.21.KeyListener
	15.21.1.	The KeyListener Interface
	15.21.2.	The event IDs that the KeyEvent class defines
	15.21.3.	How to Write a Key Listener
	15.21.4.	Demonstrates key events
	15.21.5.	KeyListener and KeyEvent
	15.21.6.	Handling Key Presses
	15.21.7.	Get key pressed as a key character (which is a Unicode character)
	15.21.8.	Get key pressed as a key code
	15.21.9.	Setting Focus Traversal Keys in a Component
	15.21.10.	Listing the Key Bindings in a Component
	15.21.11.	Make the ENTER key act like the TAB key
	15.21.12.	Overriding Many Default Typed Key Bindings in a JTextComponent