Amount of key presses a user makes over time - BPM

Question

Hi,
Im working on a small program that needs to get the amount of keypresses a user makes over time.
Basically its for calcuating the BPM a user is inputting. So a uers taps a beat for 5 seconds and the amount of tap is saved and multiplied by 12 to get the Users BPM.
So far i have this:
package Version1;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.*;
public class muTap extends JFrame implements KeyListener, ActionListener {
    JTextArea display;
     * main - the main method
    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                theGUI();
     * muTap constructor
    public muTap(String name) {
        super(name);
     * theGUI - creates the gui for muTap
    public static void theGUI() {
        muTap frame = new muTap("muTap");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //Set up the content pane.
        frame.addComponents();
        //Display the window.
        frame.pack();
        frame.setVisible(true);
     * adComponents - adds gui components to muTap
    public void addComponents() {
        JButton button = new JButton("Start");
        button.addActionListener(this);
        display = new JTextArea();
        display.setEditable(false);
        display.addKeyListener(this);
        JScrollPane scrollPane = new JScrollPane(display);
        scrollPane.setPreferredSize(new Dimension(375, 125));
        getContentPane().add(scrollPane, BorderLayout.PAGE_START);
        getContentPane().add(button, BorderLayout.PAGE_END);
    public void keyTyped(KeyEvent e) {
        //Do Nothing
    /** Handle the key pressed event from the text field. */
    public void keyPressed(KeyEvent e) {
        //TODO call the getBPMfromKboard() method
        taps++;
        System.out.println("Tap: " + taps);
    /** Handle the key released event from the text field. */
    public void keyReleased(KeyEvent e) {
        //Do Nothing
    /** Handle the button click. */
    public void actionPerformed(ActionEvent e) {
        //Do Nothing
        //initialCountdown(3, "Start Tapping Fool");
        countDown(3);
     * countDown - a simple countdown timer for use when getting users input.
     * @param time amount of time to count down from
     * @return      true when timer ends.
    public static int taps;
    public void countDown(final int time) {
        taps = 0;
        final Timer timer = new Timer();
        timer.scheduleAtFixedRate(new TimerTask()
            int i = time;
            public void run()  {
                i--;
                String s = Integer.parseInt(i); // error because of this i.
                display.setText(s);
                if (i < 0) {
                    timer.cancel();
                    if(time == 3)
                        display.setText("Start Tapping");
                        countDown(5);
                    else if(time == 5)
                        display.setText("Number of taps: " + taps);
                        //System.out.print("Number of taps" +taps);
        }, 0, 1000);
}But i get errors when i try running it:
"Exception in thread "Timer-1" java.lang.RuntimeException: Uncompilable source code"
It doesnt seem to like me parsing int to string here:
String s = Integer.parseInt(i); Any ideas? or if youve got suggestions on another way to do it it'd be much appreiated.
Thanks!

Answer 1

Korvanica wrote:
It doesnt seem to like me parsing int to string here:
String s = Integer.parseInt(i);
Yikes, you've got that bit of code backward, there partner.
You use Integer.parseInt to parse a String into an int, not the other way around.
If you want to change an int to a String, do
String s = String.valueOf(i)or you can use the various formatters out there.