Two buttons pressing

Question

I know some Java and I have to make a program that will press two buttons like this:
If i press the button START it will
1. Wait 5000 milliseconds
2. Press F5
3. Wait 100 milliseconds
4. Press Enter
5. Wait 2000 milliseconds
and then over and over again from step 2, until i press the button STOP
I don't think that it will work in applet, because when you minimize applet, it stops working. Am I right?
So I will have to use the standard Java. Right?
And by the way. What is the function for automatic press of some king of button?

Answer 1

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class RobotDemo {
    private final JButton startButton = new JButton("Start");
    private final JButton stopButton = new JButton("Stop");
    private final ButtonActionListener listener = new ButtonActionListener();
    private final JTextArea display = new JTextArea(10, 40);
    private final String newline = System.getProperty("line.separator");
    private PhantomKeyPresser phantom;
    public RobotDemo() {
        initGui();
    public static void main(String[] args) {
        new RobotDemo();
    private void initGui() {
        JFrame frame = new JFrame("RobotDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        display.setEditable(false);
        frame.getContentPane().add(new JScrollPane(display), BorderLayout.CENTER);
        startButton.addActionListener(listener);
        stopButton.addActionListener(listener);
        stopButton.setEnabled(false);
        JPanel buttonPanel = new JPanel();
        buttonPanel.add(startButton);
        buttonPanel.add(stopButton);
        frame.getContentPane().add(buttonPanel, BorderLayout.SOUTH);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
        display.addKeyListener(new KeyAdapter() {
            public void keyPressed(KeyEvent e) {
                display("Somebody pressed: " + KeyEvent.getKeyText(e.getKeyCode()));
        display.requestFocus();
    private void display(final String message) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                display.append(message);
                display.append(newline);
    private class ButtonActionListener implements ActionListener {
        public void actionPerformed(ActionEvent evt) {
            if (evt.getSource() == startButton) {
                startButton.setEnabled(false);
                stopButton.setEnabled(true);
                startPhantom();
            } else if (evt.getSource() == stopButton) {
                startButton.setEnabled(true);
                stopButton.setEnabled(false);
                stopPhantom();
    private void startPhantom() {
        phantom = new PhantomKeyPresser();
        Thread t = new Thread(phantom);
        t.start();
    private void stopPhantom() {
        phantom.stop();
    private class PhantomKeyPresser implements Runnable {
        private boolean iShouldKeepRunning = true;
        private Robot robot;
        public void run(){
            display("The phantom has been started!");
            try {
                robot = new Robot();
            } catch (Exception e) {
                throw new RuntimeException(e);
            display("The phantom waits for 5 seconds...");
            sleep(5000);
            while (iShouldKeepRunning) {
                display("The phantom presses the F5 key...");
                robot.keyPress(KeyEvent.VK_F5);
                sleep(100);
                display("The phantom presses the Enter key...");
                robot.keyPress(KeyEvent.VK_ENTER);
                sleep(2000);
        public void stop() {
            iShouldKeepRunning = false;
            display("The phantom has been stopped!");
        private void sleep(long millis) {
            try {
                Thread.sleep(millis);
            } catch (InterruptedException e) {
                e.printStackTrace();
}