Java tutorial
import java.awt.Color; import java.awt.Dimension; import java.awt.Font; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.Timer; public class Main extends JFrame { JFrame frame = new JFrame(); public Main() { frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(new Panel()); frame.pack(); frame.setVisible(true); } public static void main(String[] args) { new Main(); } } class Panel extends JPanel { Timer timer; Panel() { setBackground(Color.BLACK); setForeground(Color.WHITE); refreshScreen(); } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); g.setFont(new Font("arial", Font.PLAIN, 24)); g.drawString("java2s.com", 200, 200); } public void refreshScreen() { timer = new Timer(0, new ActionListener() { @Override public void actionPerformed(ActionEvent e) { repaint(); } }); timer.setRepeats(true); // Aprox. 60 FPS timer.setDelay(17); timer.start(); } @Override public Dimension getPreferredSize() { return new Dimension(650, 480); } }