Add Key Listener to JFrame - Java Swing

Java examples for Swing:Key Event

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Description

Add Key Listener to JFrame

Demo Code

import java.awt.FlowLayout;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

import javax.swing.JFrame;
import javax.swing.JLabel;

public class Main extends JFrame {
  JLabel keyLabel = new JLabel("Hit any key");

  public Main() {
    super("Hit a Key");
    setSize(300, 200);//from   w ww  . j  a v a2s . c  o  m
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setLayout(new FlowLayout(FlowLayout.CENTER));
    KeyAdapter monitor = new KeyAdapter() {
      public void keyTyped(KeyEvent event) {
        keyLabel.setText("" + event.getKeyChar());
        repaint();
      }
    };
    setFocusable(true);
    addKeyListener(monitor);
    add(keyLabel);
    setVisible(true);
  }

  public static void main(String[] arguments) {

    new Main();
  }
}

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