Invalid method declaration; return type required

Question

The code:
          public Reminder(int seconds) {
        timer = new Timer();
        timer.schedule(new RemindTask(), seconds*1000);
    class RemindTask extends TimerTask {
        public void run() {
            System.out.format("Time's up!%n");
            timer.cancel(); //Terminate the timer thread
public static void main(String[] args)
          JFrame.setDefaultLookAndFeelDecorated(true);
          JDialog.setDefaultLookAndFeelDecorated(true);
          try
               UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
          catch (Exception ex)
               System.out.println("Failed loading L&F: ");
               System.out.println(ex);
       new superball();
                new Reminder(5);
        System.out.format("Task scheduled.%n");
//= End of Testing =
    }Gives:
"invalid method declaration; return type required"
If i add void to public Reminder(int seconds) {It prints:
cannot find symbol
symbol : class Reminder
location: class superball
new Reminder(5);
Is it because of the public class?
public class superball extends JFrameHere is the FULL code:
/*                      superball                                 */
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.regex.Pattern;
import java.util.Timer;
import java.util.TimerTask;
import java.util.*;
import java.io.*;
* Summary description for superball
public class superball extends JFrame
     // Variables declaration
     int ballx;
  int bally;
     int jumpstop;
     int stopper;
     int coin;
     int coinx;
     int coiny;
     int coinvaluex;
     int coinvaluey;
  Timer timer;
  private int value = 0;
     private static Random r = new Random();
     private JLabel jLabel1;
     private JLabel jLabel2;
     private JLabel jLabel4;
     private JLabel jLabel5;
     private JLabel jLabel7;
     private JLabel jLabel9;
     private JLabel jLabel10;
     private JPanel contentPane;
     private JPanel jPanel1;
     // End of variables declaration
     public superball()
          super();
          initializeComponent();
          // TODO: Add any constructor code after initializeComponent call
          this.setVisible(true);
      * This method is called from within the constructor to initialize the form.
      * WARNING: Do NOT modify this code. The content of this method is always regenerated
      * by the Windows Form Designer. Otherwise, retrieving design might not work properly.
      * Tip: If you must revise this method, please backup this GUI file for JFrameBuilder
      * to retrieve your design properly in future, before revising this method.
     private void initializeComponent()
          jLabel1 = new JLabel();
          jLabel2 = new JLabel();
          jLabel4 = new JLabel();
          jLabel5 = new JLabel();
          jLabel7 = new JLabel();
          jLabel9 = new JLabel();
          jLabel10 = new JLabel();
          coin = 1;
          coinx = Math.abs(r.nextInt()) % 460 + 100;
          coiny = Math.abs(r.nextInt()) % 200 + 100;
          ballx = 342;
          bally = 338;
          jumpstop = 0;
          stopper = 13;
          contentPane = (JPanel)this.getContentPane();
          jPanel1 = new JPanel();
          // jLabel1
          jLabel1.setIcon(new ImageIcon("IMG\\coin.gif"));
          jLabel1.setText("0");
          // jLabel2
          jLabel2.setIcon(new ImageIcon("IMG\\logo.PNG"));
          // jLabel4
          jLabel4.setIcon(new ImageIcon("IMG\\black.GIF"));
          // jLabel5
          jLabel5.setIcon(new ImageIcon("IMG\\ballstanding2.gif"));
          // jLabel7
          jLabel7.setIcon(new ImageIcon("IMG\\star-heart.gif"));
          jLabel7.setText(" 100");
          // jLabel9
          jLabel9.setIcon(new ImageIcon("IMG\\coin.gif"));
          // jLabel10
          jLabel10.setIcon(new ImageIcon("IMG\\stage1.GIF"));
          // contentPane
          contentPane.setLayout(null);
          contentPane.setBackground(new Color(255, 254, 254));
          addComponent(contentPane, jLabel5, 342,338,60,18);
          addComponent(contentPane, jLabel1, 561,4,100,18);
          addComponent(contentPane, jLabel2, 2,3,208,24);
          addComponent(contentPane, jLabel7, 495,4,60,18);
          addComponent(contentPane, jLabel9, coinx,coiny,19,18);
          addComponent(contentPane, jLabel2, 2,3,208,24);
          addComponent(contentPane, jLabel10, -2,29,738,412);
          addComponent(contentPane, jPanel1, 79,209,200,100);
          // jPanel1
          jPanel1.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));
          jPanel1.setFocusable(true);
          jPanel1.addKeyListener(new KeyAdapter() {
               public void keyPressed(KeyEvent e)
                    jPanel1_keyPressed(e);
               public void keyReleased(KeyEvent e)
                    jPanel1_keyReleased(e);
               public void keyTyped(KeyEvent e)
                    jPanel1_keyTyped(e);
          // superball
          this.setTitle("Superball created by Hannes Karlsson");
          this.setLocation(new Point(0, 0));
          this.setSize(new Dimension(617, 450));
          this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
          this.setResizable(false);
     /** Add Component Without a Layout Manager (Absolute Positioning) */
     private void addComponent(Container container,Component c,int x,int y,int width,int height)
          c.setBounds(x,y,width,height);
          container.add(c);
     // TODO: Add any appropriate code in the following Event Handling Methods
     private void jPanel1_keyPressed(KeyEvent e)
          System.out.println("\njPanel1_keyPressed(KeyEvent e) called.");
          // TODO: Add any handling code here
          if(e.getKeyCode()==e.VK_LEFT) // when the user enters left
              jLabel5.setLocation(new Point(ballx--, bally));
                    jLabel5.setLocation(new Point(ballx--, bally));
                    jLabel5.setLocation(new Point(ballx--, bally));
                    jLabel5.setLocation(new Point(ballx--, bally));
                    jLabel5.setIcon(new ImageIcon("IMG\\ballroll.gif"));
                    } // equalling PLAIN_SPEED
                                        if(e.getKeyCode()==e.VK_RIGHT) // when the user enters right
              jLabel5.setLocation(new Point(ballx++, bally));
                    jLabel5.setLocation(new Point(ballx++, bally));
                    jLabel5.setLocation(new Point(ballx++, bally));
                    jLabel5.setLocation(new Point(ballx++, bally));
                    jLabel5.setIcon(new ImageIcon("IMG\\ballroll.gif"));
                    } // equalling PLAIN_SPEED
                                                            if(e.getKeyCode()==e.VK_UP) // when the user enters up
              jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setIcon(new ImageIcon("IMG\\balljetpack.gif"));
                    } // equalling PLAIN_SPEED
                                                                                if(e.getKeyCode()==e.VK_DOWN) // when the user enters up
              jLabel5.setLocation(new Point(ballx, bally++));
                    jLabel5.setLocation(new Point(ballx, bally++));
                    jLabel5.setLocation(new Point(ballx, bally++));
                    jLabel5.setLocation(new Point(ballx, bally++));
                    jLabel5.setIcon(new ImageIcon("IMG\\ballroll.gif"));
                    } // equalling PLAIN_SPEED     
                    if(bally>=340)
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                              System.out.println("LOW!!!");
                    if(bally<=-2)
                    jLabel5.setLocation(new Point(ballx, bally++));
                    jLabel5.setLocation(new Point(ballx, bally++));
                    jLabel5.setLocation(new Point(ballx, bally++));
                    jLabel5.setLocation(new Point(ballx, bally++));
                              System.out.println("HIGH!!!");
                                        if(ballx>=594)
                    jLabel5.setLocation(new Point(ballx--, bally));
                    jLabel5.setLocation(new Point(ballx--, bally));
                    jLabel5.setLocation(new Point(ballx--, bally));
                    jLabel5.setLocation(new Point(ballx--, bally));
                              System.out.println("RIGHT!!!");
                                                            if(ballx<=-3)
                    jLabel5.setLocation(new Point(ballx++, bally));
                    jLabel5.setLocation(new Point(ballx++, bally));
                    jLabel5.setLocation(new Point(ballx++, bally));
                    jLabel5.setLocation(new Point(ballx++, bally));
                              System.out.println("LEFT!!!");
                                                                       if (bally==294 && (ballx > 218 && ballx < 274))
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                                                                       if (bally==262 && (ballx > 246 && ballx < 306))
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                                                   if (bally==230 && (ballx > 486 && ballx < 562))
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                                    if (bally==310 && (ballx > 486 && ballx < 594))
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                     if (bally==262 && (ballx > 442 && ballx < 514))
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
      if (bally==294 && (ballx > 378 && ballx < 466))
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
                    jLabel5.setLocation(new Point(ballx, bally--));
               // COIN
                     if ((bally > coiny-10 && bally < coiny+10) && (ballx > coinx-10 && ballx < coinx+10))
            coinx = Math.abs(r.nextInt()) % 617 + 1;
            coiny = Math.abs(r.nextInt()) % 300 + 1;
               jLabel9.setLocation(new Point(coinx, coiny));
                    System.out.println("Coinx:"+coinx+"");
                    System.out.println("Coiny:"+coiny+"");
                    jLabel1.setText(""+ coin++ +"");
                    System.out.println("Ballx:"+ballx+"");
                    System.out.println("Bally:"+bally+"");
     private void jPanel1_keyReleased(KeyEvent e)
          System.out.println("\njPanel1_keyReleased(KeyEvent e) called.");
          // TODO: Add any handling code here
          jLabel5.setIcon(new ImageIcon("IMG\\ballstanding2.gif"));
     private void jPanel1_keyTyped(KeyEvent e)
          System.out.println("\njPanel1_keyTyped(KeyEvent e) called.");
          // TODO: Add any handling code here
     // TODO: Add any method code to meet your needs in the following area
//============================= Testing ================================//
//=                                                                    =//
//= The following main method is just for testing this class you built.=//
//= After testing,you may simply delete it.                            =//
//======================================================================//
          public void Reminder(int seconds) {
        timer = new Timer();
        timer.schedule(new RemindTask(), seconds*1000);
    class RemindTask extends TimerTask {
        public void run() {
            System.out.format("Time's up!%n");
            timer.cancel(); //Terminate the timer thread
     public static void main(String[] args)
          JFrame.setDefaultLookAndFeelDecorated(true);
          JDialog.setDefaultLookAndFeelDecorated(true);
          try
               UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
          catch (Exception ex)
               System.out.println("Failed loading L&F: ");
               System.out.println(ex);
       new superball();
                new Reminder(5);
        System.out.format("Task scheduled.%n");
//= End of Testing =
}

Answer 1

No, it's because you can't have a constructor called Reminder if you don't have a class named Reminder.