A constructor cannot specify a return type.

I have a shuffleList.as file with this code...
package {
import flash.display.MovieClip;
public class shuffleList extends MovieClip{
function shuffleList(arr:Array):Array{
var shuffled:Array = arr.slice();
for (var i:int=0; i<arr.length; i++) {
var element:Object = shuffled
var rnd:int = Math.floor(arr.length * Math.random());
shuffled = shuffled[rnd];
shuffled[rnd] = element;
return shuffled;
In the first frame i put this code...
import shuffleList
var numA:Array = [0,1,2,3,4,5,6,7,8,9,10]
var numB:Array = shuffleList(numB);
var myText:String = numB.pop()
fieldA.text = myText
With this code I want to put in random order the numbers from
0 to 10 in the fieldA.
When run this file the compiler report this error: "A
constructor cannot specify a return type."
Where I'm wrong;
I'm new in actionscript..
Please help...

Hey Petros,
I had a similar problem and the response I got was:
1) the constructor is used to set up the class but it doesn't
really exist until it is instantiated and therefore cannot include
any 'interaction' including a return.
2) Therefore, you might try replacing
function.shuffleList ... with
function.shuffleList() { // to enable instantiation
public function doit(arr:Array):Array { // to enable
interaction
The rest of the code follows this then the call in the first
frame replaces
var numB:Array ... with
new shuffleList(); // instantiate the class
var numB:Array = shuffleList.doit(numB) // interact with the
class
Let me know how it goes...Daniel

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  • Why constructor do not have return type

    Why constructor do not have return type

    enter_name wrote:
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    Well, constructors may actually return something but if they do it's a secret between them and new. Constructors cannot be called by the programmer like methods. They don't even belong to the class. They're only used during object construction and then by new.

  • Throw userDefinedException cannot work with return type

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  • Why constructors doesn't have a return type ??

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  • Why Constructor has not return type ?

    Please tell me why constructor has not return type ?

    Constructor is a method which basically called for creating instances of an object. 
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  • Asking for return type with constructor

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    radiorx wrote:
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  • Why return type required on a constructor?

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  • What is the default return type for a constructor

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  • Invalid method declaration; return type required

    The code:
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    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
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         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.
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              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);
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              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);
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         private void addComponent(Container container,Component c,int x,int y,int width,int height)
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         private void jPanel1_keyPressed(KeyEvent e)
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              if(e.getKeyCode()==e.VK_LEFT) // when the user enters left
                  jLabel5.setLocation(new Point(ballx--, bally));
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                        jLabel5.setLocation(new Point(ballx--, bally));
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                        jLabel5.setLocation(new Point(ballx++, bally));
                        jLabel5.setLocation(new Point(ballx++, bally));
                        jLabel5.setIcon(new ImageIcon("IMG\\ballroll.gif"));
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                        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"));
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                  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"));
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                        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;
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                        System.out.println("Coinx:"+coinx+"");
                        System.out.println("Coiny:"+coiny+"");
                        jLabel1.setText(""+ coin++ +"");
                        System.out.println("Ballx:"+ballx+"");
                        System.out.println("Bally:"+bally+"");
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              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.                            =//
    //======================================================================//
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            timer = new Timer();
            timer.schedule(new RemindTask(), seconds*1000);
        class RemindTask extends TimerTask {
            public void run() {
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              JDialog.setDefaultLookAndFeelDecorated(true);
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                   System.out.println(ex);
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                    new Reminder(5);
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