Mouse shift event coding - to trigger a predetermined sequence of images to a GUI

[Simon Evans]

Dear Programmers

I was hoping if anybody out there might know of a program or tutorial concerning mouse shift event listener gui programs, that would present a predetermined sequence of images to an area of the gui upon the mouse being shifted over that specific area of the gui.

At present I have code that will change an area's color if the mouse is shifted over it, but I was hoping to code something a bit more spectacular, ie: for it to activate not just the appearance of an image, but as said - a sequence of images, which will keep on sequencing until mouse cursor is shifted off.

If any of you know of such code, or where it may be found, I would be glad, having followed several red herrings (spinnners, html) in pursuit of this objective already.

Thanks for reading.

PS: Dear Joanne, and Ritchie,

Indeed, There is'nt much difference between this topic and the previous one.

The reason I rewrote it was because by the first (and so far only) response I got, it evidently had been interpreted as a Game programming design request, 'cause of my reference to a pack of cards, whereas it could have referred to any predetermined sequence of any images - the alphabet, roadsigns, sephamore, heiroglyphs - you name it.

The fact is that it isn't a program requiring game programming design, therefore I hope you appreciate I got the impression my first letter was giving the wrong impression of what I was looking for. I wrote a letter to the sender to that effect, explaining more concisely what I was seeking - something less advanced than game coding.

It was because of this I rewrote my post, also because of this I am reposting this request on the site, whether or not anyone can offer help.

If you, Joanne and Richie, as you've thus already evidenced, have a clear understanding of what I seek, perhaps you could help me out here, or suggest any extant coding that would manage this effect?

For which I would be eternally greatful.

Yours (again)

Simon

[marc weber]

What have you tried? And where are you stuck?

I'm guessing you will have an array of images, and then cycle through the array with calls to Thread.sleep in between each image presentation (so they don't race by in a blur).

[Campbell Ritchie]

Any Swing Component can have a MouseListener and MouseMotionListener added to it. You have already worked out how to get it to change colours, presumably with the mouseEntered method.

Suggest:

Your mouseEntered method starts off a new Thread (possibly with the SwingWorker class if using Java6)

Make the continuation of that thread dependent on a boolean "mouseInside" variable, maybe in a while loop.

Your thread executes the animation or sequence of images or whatever.

Your mouseExited method sets the mouseInside variable to false.

Marc has already told you to use Thread.sleep() (which declares InterruptedException) between successive images.

[Michael Dunn]

put your slideshow in a Swing.timer
mouseEntered starts the timer
mouseExited stops the timer (and removes last image if req'd)

[Joanne Neal]

I'm not having a go at you here, but there is some etiquette that needs to be pointed out, so please look on this as constructive criticism that will save you and other people a lot of time in future.

Consider the case where you ask the same question in two separate threads. Someone comes along and answers in one of the threads. A bit later, someone else comes along and sees the unanswered thread first. They put a very similar answer in that thread. That second person has wasted their time because you already have the answer.
If you get an answer that is not relevant to your question, by all means say so. Other people will then come along, see you still have a problem and maybe try and give a different answer. Rephrasing your question may even help here. But please do this in the same thread.
If you really feel you need to start a new thread, put a note in the first thread that you no longer need answers there. Maybe even change the title to say the thread is closed. That is what I was doing when I posted a link in your second thread back to your first thread. I was just indicating to other people that a conversation had already started and that posting in that thread would be better than starting a new (possibly duplicate) conversation here.

This is now the third thread on this topic so it's probably a good idea if you go back to the other one that is still open and let everyone else know it is closed (assuming a moderator doesn't beat you to it).

[Campbell Ritchie]

I think Joanne is right; I shall find the 1st of the three threads and close it

[Simon Evans]

Dear Marc weber,Campbell Ritchie, Michael Dunn, Joanne Neal,

Thank you for your respective advice, which I have taken on board.

When I've finished the program I will post it to this thread, as I think when done the result will be fascinating.

Speak to you later,

Yours

Simon

[Simon Evans]

Dear Programmers,

I was wondering if any of you that have already

helped with this subject, might give me your e-mail

address/es then I could send you the gifs that

comprise my program's gui, and when you run my

code, you will get a better idea of what I am

attempting to make ?

Re: Mark Webers entry:-

My program is still at an early stage, and
I haven't got to the level of putting gifs into an

array which'd be slowed by Thread's sleep method -

though using an array did occur to me - or even

using the Math random number method - for display

of gifs from a list to be spontaneous, than

predetermined.

is there any code out there which illustrates

either (or combined) approach ?

In fact I have tried populating an Array with my

gifs, but compiler doesn't approve - so I suppose

I'm doing it wrong - but I don't have a text upon

such an initialisation - they all deal with

standard data type initialisations to arrays, okay

that puts me somewhere in the stone age, but we've

all got to start somewhere.

If I could (all the same) accomplish putting the

gifs into an array, I could then try Michael Dunns

advice to use a swing timer and Mouse Entered

action Listener, and Campbell Ritchie's advice to

subclass program of Thread, using a boolean

expressioned while statement for the array,

contingent on the mouseActionListener.

Anyway, here is the program, at present. If you

could give me an E -mail-able address, I can send

the gifs, and then it would make a bit more sense.

Thank you for your advice,

Hoping to hear,

Yours
Simon

 
class MainMethod
{
public static void main (String args[])
{
myGui Gui = new myGui();
}
}

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import javax.swing.JFrame;
 
class TarotGui extends JFrame
{
 
ImageIcon icon1 = new ImageIcon("0.gif");
JButton b1 = new JButton(icon1);
ImageIcon icon2 = new ImageIcon("1.gif");
JButton b2  = new JButton(icon2);
ImageIcon icon3  = new ImageIcon("2.gif" );
JButton b3  = new JButton(icon3);
ImageIcon icon4  = new ImageIcon("3.gif" );
JButton b4  = new JButton(icon4);
ImageIcon icon5  = new ImageIcon( "4.gif");
JButton b5  = new JButton(icon5);
ImageIcon icon6  = new ImageIcon("5.gif" );
JButton b6 = new JButton(icon6);
ImageIcon icon7  = new ImageIcon( "6.gif");
JButton b7  = new JButton(icon7);
ImageIcon icon8  = new ImageIcon( "7.gif");
JButton b8  = new JButton(icon8);
ImageIcon icon9  = new ImageIcon("8.gif" );
JButton b9  = new JButton(icon9);
ImageIcon icon10 = new ImageIcon( "9.gif");
JButton b10  = new JButton(icon10);
ImageIcon icon11 = new ImageIcon( "10.gif");
JButton b11  = new JButton(icon11);
ImageIcon icon12 = new ImageIcon( "11.gif");
JButton b12  = new JButton(icon12);
ImageIcon icon13 = new ImageIcon( "12.gif");
JButton b13  = new JButton(icon13);
ImageIcon icon14 = new ImageIcon("13.gif" );
JButton b14  = new JButton(icon14);
ImageIcon icon15 = new ImageIcon( "14.gif");
JButton b15  = new JButton(icon15);
ImageIcon icon16 = new ImageIcon("15.gif" );
JButton b16  = new JButton(icon16);
ImageIcon icon17 = new ImageIcon("16.gif" );
JButton b17  = new JButton(icon17);
ImageIcon icon18 = new ImageIcon( "17.gif");
JButton b18 = new JButton(icon18);
ImageIcon icon19 = new ImageIcon( "18.gif");
JButton b19  = new JButton(icon19);
ImageIcon icon20 = new ImageIcon( "19.gif");
JButton b20  = new JButton(icon20);
ImageIcon icon21 = new ImageIcon( "20.gif");
JButton b21  = new JButton(icon21);
ImageIcon icon22 = new ImageIcon("21.gif" );
JButton b22  = new JButton(icon22);
ImageIcon icon23 = new ImageIcon( "22.gif");
JButton b23  = new JButton(icon23);
ImageIcon icon24 = new ImageIcon("23.gif" );
JButton b24  = new JButton(icon24);
ImageIcon icon25 = new ImageIcon("24.gif" );
JButton b25  = new JButton(icon25);
ImageIcon icon26 = new ImageIcon("25.gif" );
JButton b26  = new JButton(icon26);
ImageIcon icon27 = new ImageIcon("26.gif" );
JButton b27 = new JButton(icon27);
ImageIcon icon28 = new ImageIcon( "27.gif");
JButton b28  = new JButton(icon28);
ImageIcon icon29 = new ImageIcon( "28.gif");
JButton b29 = new JButton(icon29);
ImageIcon icon30 = new ImageIcon("29.gif" );
JButton b30  = new JButton(icon30);
ImageIcon icon31 = new ImageIcon("30.gif" );
JButton b31  = new JButton(icon31);
ImageIcon icon32 = new ImageIcon( "31.gif");
JButton b32  = new JButton(icon32);
ImageIcon icon33 = new ImageIcon( "32.gif");
JButton b33  = new JButton(icon33);
ImageIcon icon34 = new ImageIcon( "33.gif");
JButton b34  = new JButton(icon34);
ImageIcon icon35 = new ImageIcon( "34.gif");
JButton b35  = new JButton(icon35);
ImageIcon icon36 = new ImageIcon( "35.gif");
JButton b36  = new JButton(icon36);
ImageIcon icon37 = new ImageIcon( "36.gif");
JButton b37  = new JButton(icon37);
ImageIcon icon38 = new ImageIcon( "37.gif");
JButton b38  = new JButton(icon38);
ImageIcon icon39 = new ImageIcon( "38.gif");
JButton b39  = new JButton(icon39);
ImageIcon icon40 = new ImageIcon("39.gif" );
JButton b40  = new JButton(icon40);
ImageIcon icon41 = new ImageIcon( "40.gif");
JButton b41  = new JButton(icon41);
ImageIcon icon42 = new ImageIcon("41.gif");
JButton b42 = new JButton(icon42);
ImageIcon icon43 = new ImageIcon("42.gif");
JButton b43  = new JButton(icon43);
ImageIcon icon44  = new ImageIcon("43.gif" );
JButton b44  = new JButton(icon44);
ImageIcon icon45  = new ImageIcon("44.gif" );
JButton b45  = new JButton(icon45);
ImageIcon icon46  = new ImageIcon( "45.gif");
JButton b46  = new JButton(icon46);
ImageIcon icon47  = new ImageIcon("46.gif" );
JButton b47 = new JButton(icon47);
ImageIcon icon48  = new ImageIcon( "47.gif");
JButton b48  = new JButton(icon48);
ImageIcon icon49  = new ImageIcon( "48.gif");
JButton b49  = new JButton(icon49);
ImageIcon icon50  = new ImageIcon("49.gif" );
JButton b50  = new JButton(icon50);
ImageIcon icon51 = new ImageIcon( "50.gif");
JButton b51  = new JButton(icon51);
ImageIcon icon52 = new ImageIcon( "51.gif");
JButton b52  = new JButton(icon52);
ImageIcon icon53 = new ImageIcon( "52.gif");
JButton b53  = new JButton(icon53);
ImageIcon icon54 = new ImageIcon( "53.gif");
JButton b54  = new JButton(icon54);
ImageIcon icon55 = new ImageIcon("54.gif" );
JButton b55  = new JButton(icon55);
ImageIcon icon56 = new ImageIcon( "55.gif");
JButton b56  = new JButton(icon56);
ImageIcon icon57 = new ImageIcon("56.gif" );
JButton b57  = new JButton(icon57);
ImageIcon icon58 = new ImageIcon("57.gif" );
JButton b58  = new JButton(icon58);
ImageIcon icon59 = new ImageIcon( "58.gif");
JButton b59 = new JButton(icon59);
ImageIcon icon60 = new ImageIcon( "59.gif");
JButton b60  = new JButton(icon60);
ImageIcon icon61 = new ImageIcon( "60.gif");
JButton b61  = new JButton(icon61);
ImageIcon icon62 = new ImageIcon( "61.gif");
JButton b62  = new JButton(icon62);
ImageIcon icon63 = new ImageIcon("62.gif" );
JButton b63  = new JButton(icon63);
ImageIcon icon64 = new ImageIcon( "63.gif");
JButton b64  = new JButton(icon64);
ImageIcon icon65 = new ImageIcon("64.gif" );
JButton b65  = new JButton(icon65);
ImageIcon icon66 = new ImageIcon("65.gif" );
JButton b66  = new JButton(icon66);
ImageIcon icon67 = new ImageIcon("66.gif" );
JButton b67  = new JButton(icon67);
ImageIcon icon68 = new ImageIcon("67.gif" );
JButton b68 = new JButton(icon68);
ImageIcon icon69 = new ImageIcon( "68.gif");
JButton b69  = new JButton(icon69);
ImageIcon icon70 = new ImageIcon( "69.gif");
JButton b70 = new JButton(icon70);
ImageIcon icon71 = new ImageIcon("70.gif" );
JButton b71  = new JButton(icon71);
ImageIcon icon72 = new ImageIcon("71.gif" );
JButton b72  = new JButton(icon72);
ImageIcon icon73 = new ImageIcon( "72.gif");
JButton b73  = new JButton(icon73);
ImageIcon icon74 = new ImageIcon( "73.gif");
JButton b74  = new JButton(icon74);
ImageIcon icon75 = new ImageIcon( "74.gif");
JButton b75  = new JButton(icon75);
ImageIcon icon76 = new ImageIcon( "75.gif");
JButton b76  = new JButton(icon76);
ImageIcon icon77 = new ImageIcon( "76.gif");
JButton b77  = new JButton(icon77);
ImageIcon icon78 = new ImageIcon("77.gif");
 

MyWindowHandler myWindowHandler ;
myGui()
{
setupGUI();
}
 
private void setupGUI()
{
Container c = getContentPane();
c.setLayout(new GridLayout(6,7));
c.add(b1);
c.add(b2);
c.add(b3);
c.add(b4);
c.add(b5);
c.add(b6);
c.add(b7);
c.add(b8);
c.add(b9);
c.add(b10);
c.add(b11);
c.add(b12);
c.add(b13);
c.add(b14);
c.add(b15);
c.add(b16);
c.add(b17);
c.add(b18);
c.add(b19);
c.add(b20);
c.add(b21);
c.add(b22);
c.add(b23);
c.add(b24);
c.add(b25);
c.add(b26);
c.add(b27);
c.add(b28);
c.add(b29);
c.add(b30);
c.add(b31);
c.add(b32);
c.add(b33);
c.add(b34);
c.add(b35);
c.add(b36);
c.add(b37);
c.add(b38);
c.add(b39);
c.add(b40);
c.add(b41);
c.add(b42);
c.add(b43);
c.add(b44);
c.add(b45);
c.add(b46);
c.add(b47);
c.add(b48);
c.add(b49);
c.add(b50);
c.add(b51);
c.add(b52);
c.add(b53);
c.add(b54);
c.add(b55);
c.add(b56);
c.add(b57);
c.add(b58);
c.add(b59);
c.add(b60);
c.add(b61);
c.add(b62);
c.add(b63);
c.add(b64);
c.add(b65);
c.add(b66);
c.add(b67);
c.add(b68);
c.add(b69);
c.add(b70);
c.add(b71);
c.add(b72);
c.add(b73);
c.add(b74);
c.add(b75);
c.add(b76);
c.add(b77);
 

 

myWindowHandler = new MyWindowHandler();
addWindowListener(myWindowHandler);
 
setSize(520,600);
setVisible(true);
}

}import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.JFrame;
 
public class MyWindowHandler implements WindowListener
{
JPanel center;
 
public void windowClosing(WindowEvent e)
{
Window source = e.getWindow( );
source.setVisible(false);
source.dispose();
System.exit(0);
}
 
public void windowClosed(WindowEvent e)
{
}
public void windowOpened(WindowEvent e)
{
}
public void windowIconified(WindowEvent e)
{
 
}
public void windowDeiconified(WindowEvent e)
{
center = new JPanel();
center.setBackground(Color.green);
}
public void windowActivated(WindowEvent e)
{
 
}
public void windowDeactivated(WindowEvent e)
{
}
 
} 

[Simon Evans]

oh 'ell, upon checking my post, I realise I got the first program 'MainMethod' down wrong, it should've read:

 
class MainMethod
{
public static void main (String args[])
{
TarotGui Gui = new TarotGui();
}
}

Sorry 'bout that.

Yours

Simon.

[Campbell Ritchie]

No, please don't go e-mailing anything. Read this FAQ.

And adding all those cards individually rather than using a for-loop looks a really awkward bit of programming. Do you actually want a 6*7 GridLayout? Shouldn't it be 11*7 or 7*11?

[Simon Evans]

Dear Campbell Ritchie,

I understand your (or anyone else's) reservations about giving out their E-mail addresses, in these times of computer viral infections and the like, so I won't belabour the issue, though I know there is nothing amiss with the gifs I was considering sending, I don't expect you to take what I say as gospel.

I have tried changing the layout's axi from (6,7) to the more appropriate (11,7) or (7,11) but gui gives none of these instead obdurately sticking to an output of 13 across by 6 down.

I realise the code I used could be reduced, but as stated I don't know how to populate an array with gifs, and haven't found any code on the net to this effect.

I found some code, called "Animate.java" which runs with "Animate.asp", which I thought might be of use, though having changed the "Animate.asp" to take a few of my gifs, and having put them in the same file, and tried compiling "Animate.java" on both jdk1.4 and 1.6, I get :-

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Administrator>cd c:\Java\Java Six

C:\Java\Java Six>set PATH=C:\Sun\AppServer\jdk1.6.0_05\bin;%PATH%

C:\Java\Java Six>javac Animate.java
Note: Animate.java uses or overrides a deprecated API.
Note: Recompile with -deprecation for details.

C:\Java\Java Six>

Is there a way I can fix this?

I enclose the code to "Animate.java" and "Animate.asp" below. If it could be made to run, it'd be a start.
Thank you for your help.

Yours
Simon.

 <applet code="Animate.class" width=230 height=166>
<param name="image0" value="s0.gif">
<param name="image1" value="1.gif">
<param name="image2" value="2.gif">
<param name="image3" value="3.gif">
<param name="pause" value="400">
</applet> 
 

 

 import java.awt.*;
 
 public class Animate extends java.applet.Applet implements Runnable {
 
     Image[] picture = new Image[6];
     int totalPictures = 0;
     int current = 0;
     Thread runner;
     int pause = 500;
 
     public void init() {
         for (int i = 0; i < 6; i++) {
            String imageText = null;
            imageText = getParameter("image"+i);
             if (imageText != null) {
                 totalPictures++;
                 picture[i] = getImage(getCodeBase(), imageText);
             } else
                 break;
        }
        String pauseText = null;
        pauseText = getParameter("pause");
         if (pauseText != null) {
             pause = Integer.parseInt(pauseText);
         }
     }
 
     public void paint(Graphics screen) {
         screen.drawImage(picture[current],0,0,this);
     }
 
     public void start() {
         if (runner == null) {
             runner = new Thread(this);
             runner.start();
         }
     }
 
     public void run() {
         while (true) {
             repaint();
             current++;
            if (current >= totalPictures)
                 current = 0;
             try { Thread.sleep(pause); }
             catch (InterruptedException e) { }
         }
     }
 
     public void stop() {
         if (runner != null) {
             runner.stop();
             runner = null;
         }
     }
 
     public void update(Graphics screen) {
         paint(screen);
     }
 } 
 

[Joanne Neal]

Originally posted by Simon Evans:
C:\Java\Java Six>javac Animate.java
Note: Animate.java uses or overrides a deprecated API.
Note: Recompile with -deprecation for details.

C:\Java\Java Six>

Is there a way I can fix this?

This is only a warning. The code should still have compiled.

Just for reference - when you do get this warning, you should recompile with the -deprecation option. This will tell you which deprecated APIs are being used. The Javadoc should then tell you what to use in their place.
[ August 19, 2008: Message edited by: Joanne Neal ]

[Campbell Ritchie]

You are using Thread.stop(); which is not just deprecated, but dangerously deprecated. Not quite sure what you use instead, it's such a long time since I had to Thread like that. But Java Tutorials to the rescue! Try there first. You might get away with simply setting the Thread to null.

To set up an array of Images, is just like setting up any other array . . .

ImageIcon[] icons = new ImageIcon[78];
for (int i = 0; i < icons.length; i++)
{
   icons[i] = new ImageIcon(String.format("%d.gif", i));
   // You have the same number for the picture as for the array index.
   c.add(new JButton(icons[i]);
}

You may need an array of Buttons too.
I thought you had 77 images; you have in fact got 78, hence 11*7. Sorry. That would be 6*13. Check the constructor parameters for GridLayout to see which is rows and which columns. Also whether you can actually get 13 into the space available.

The reason for not giving advice by e-mail is that all discussion ought to take place on the boards, in public, where everybody can take part and help.

[Joanne Neal]

Originally posted by Campbell Ritchie:
You are using Thread.stop(); which is not just deprecated, but dangerously deprecated.

Must get my eyes tested. I did do a quick check for that, knowing that it was one of the few times when a deprecated API definitely should be replaced, but I guess I missed it.

[Campbell Ritchie]

Think nothing of it, Joanne; after all I missed that he was using 78 cards, not 77.

Thread.stop()? Can you remember what you use instead? Or do you simply put a while loop inside the run() method?

[Joanne Neal]

Originally posted by Campbell Ritchie:
Think nothing of it, Joanne; after all I missed that he was using 78 cards, not 77.

Thread.stop()? Can you remember what you use instead? Or do you simply put a while loop inside the run() method?

The thread will normally stop as soon as you exit the run method. However, the OP has an infinite loop in the run method, so at the moment it will never exit.
The normal way to stop this sort of thread is to have a boolean variable in your Runnable class which you check the value of as part of the while loop. You then need another thread to change the value of this variable.

[Simon Evans]

Dear Campbell Ritchie Joanne Neal,

I think the program 'Animate04' at //http://www.developer.com/java/other/article.php/1587091#Preface
by Robert Baldwin, is close to what I am seeking, ie: worth nicking.
Speak to you later.
Yours
Simon.

[Simon Evans]

Dear Campbell Ritchie and Joanne Neal, and other programmers,

I have requisitioned R.G.Baldwins code for program Animate04 (now

Animate06) so that - for a start, it'll present two Jlabels to the

ContentPane, that will go through the array of gifs when the mouse is

within the ContentPane.

The next appropriate step I had considered would be that, in order to get

the Image to change when the mouse was only on the pertinent image (rather

than both when the Pane area is broached, as it does now)I ought change

the line :

getContentPane().addMouseListener

with code that'd replace the contentPane with the JLabel objects, label

and labeltwo, but that presents a difficulty - first it appears a Jlabel

object's area is not recognisable by the addMouseListener() method - or so

the compiler says.

Also would it not be true to reckon that the whole of the addMouseListener

method -all sixteen lines down to the

setDefaultCloseOperation(EXIT_ON_CLOSE);

line - would have to be added to each object that ought have a

MouseListener added to it - or might there be a more efficient way of

coding it?

As I was hoping for an eventual gridLayout of say 7 * 11 - or 6 * 13 (the

1*2 is just to keep it brief) - that'd entail a lot of (hopefully)

extraneous code (ie: 16 * 77 = 462, or so, lines).

You can use any gifs in this program - so long as they are named 0.gif up

to 4, to get an idea of what it does, and what it is intended to do.

I hope you can offer me any advice regarding where take it from here.

Thank you for your help,

Yours Simon

Code follows:-

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
public class Animate06 extends JFrame
{
Thread animate;
ImageIcon images[] =
{
new ImageIcon("0.gif"),
new ImageIcon("1.gif"),
new ImageIcon("2.gif"),
new ImageIcon("3.gif"),
new ImageIcon("4.gif"),
 

};
JLabel label = new JLabel(images[0]);
JLabel labeltwo = new JLabel(images[0]);
  
public Animate06()
{
Container c = getContentPane();
c.setLayout(new GridLayout(2,1));
c.add(label);
c.add(labeltwo);
 
    
getContentPane().addMouseListener(
new MouseAdapter()
{
public void mouseEntered(MouseEvent e)
{         
animate = new Animate();
animate.start();
}
 
public void mouseExited(MouseEvent e)
{
animate.interrupt();
          
while (animate.isAlive())
{}
animate = null;
//label.setIcon(images[0]);
//label.repaint();
}
}
);
    
setDefaultCloseOperation(EXIT_ON_CLOSE);    
setTitle("Copyright 2003, R.G.Baldwin");
setSize(250,200);
setVisible(true);
}
 
public static void main(String[] args)
{
new Animate06();
}
 
class Animate extends Thread
{
public void run()
{
try
{
while(true)
{       
display(1,500);
display(2,500);
display(3,500);
display(4,500);
 
}
}catch(Exception ex)
{
if(ex instanceof InterruptedException)
{        
}
else
{
System.out.println(ex);
System.exit(1);
}
}
}
    
void display(int image,int delay) 
throws InterruptedException
{
label.setIcon(images[image]);
label.repaint();
labeltwo.setIcon(images[image]);
labeltwo.repaint();
if(Thread.currentThread().interrupted())
throw(new InterruptedException());
Thread.currentThread().sleep(delay);
}   
}
}
 

[Michael Dunn]

just so you can compare to another way, here's a timer version.
also should not require too many more lines of code to expand to your 78 images

    
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Testing
{
  JLabel animationLabel;
  public void buildGUI()
  {
    final ImageIcon images[] =
    {
      new ImageIcon("Test5.gif"),
      new ImageIcon("Test1.gif"),
      new ImageIcon("Test2.gif"),
      new ImageIcon("Test3.gif"),
      new ImageIcon("Test4.gif"),
    };
    JPanel p = new JPanel(new GridLayout(0,1));
    JLabel label = new JLabel(images[0]);
    JLabel labeltwo = new JLabel(images[0]);
    p.add(label);
    p.add(labeltwo);
 
    JFrame f = new JFrame();
    f.getContentPane().add(p);
    f.setSize(100,100);
    f.setLocationRelativeTo(null);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setVisible(true);
 
    final javax.swing.Timer timer = new javax.swing.Timer(500,new ActionListener(){
      public void actionPerformed(ActionEvent ae){
        animationLabel.setIcon(images[(int)(Math.random()*images.length)]);
      }
    });
    MouseListener mousie = new MouseAdapter(){
      public void mouseEntered(MouseEvent me){
        animationLabel = (JLabel)me.getSource();
        timer.start();
      }
      public void mouseExited(MouseEvent me){
        if(timer.isRunning()) timer.stop();
      }
    };
    label.addMouseListener(mousie);
    labeltwo.addMouseListener(mousie);
  }
  public static void main(String[] args)
  {
    SwingUtilities.invokeLater(new Runnable(){
      public void run(){
        new Testing().buildGUI();
      }
    });
  }
}

[Simon Evans]

Dear Programmers,
I am writing to you separately, regarding previous correspondence,

Dear Michael Dunn,
Thank you for 'Testing' it's very close to what I was looking for, if I have any criticism it is that you've done most of my work for me, as the next step I was going to take, after changing the GUI layout, was to randomize the gif sequences - but 'Testing' has already accomplished that for me - Much Thanks.

Dear Campbell Ritchie, I have been trying to incorporate the coding you suggested I use in initialising the ImageIcon array 'images' with a for do loop, into the program 'Testing' as provided by Michael Dunn (see above) as I wanted to use all 78 images for each array, (thus using 78 arrays of 78 images each in total) but it seems the compiler doesn't accept the line:

images[i] = new ImageIcon(String.format("%d.gif",i));

pointing to the String.format part of the line. It isn't due to the jdk's grading, as I ran it on jdk 1.6 and got the same response.

The code I am compiling is as follows (it is practically as Michael Dunn's 'Testing' program, at present) :-

 
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Tarot
{  
JLabel animationLabel;
 
public void buildGUI()  
{ 
 
final ImageIcon images[] =    new ImageIcon[78];
for (int i;i<images.length;i++)
{
images[i] = new ImageIcon(String.format("%d.gif",i)); 
} ;  
 
JLabel labeltwo = new JLabel(images[0]); 
JLabel label = new JLabel(images[0]);        
JPanel p = new JPanel(new GridLayout(2,0));
JFrame f = new JFrame();    
f.getContentPane().add(p);          
 
f.setSize(100,100);    
f.setLocationRelativeTo(null);    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    
f.setVisible(true);
 
     
final javax.swing.Timer timer = new javax.swing.Timer(500,new ActionListener()
{      
public void actionPerformed(ActionEvent ae)
{        
animationLabel.setIcon(images[(int)(Math.random()*images.length)]);
}    
}); 
   
MouseListener mousie = new MouseAdapter()
{      
public void mouseEntered(MouseEvent me)
{        animationLabel = (JLabel)me.getSource();        
timer.start();      
}  
    
public void mouseExited(MouseEvent me)
{        
if(timer.isRunning()) timer.stop();      
}    
};    
label.addMouseListener(mousie);    
labeltwo.addMouseListener(mousie);  
}  
public static void main(String[] args)  
{    
SwingUtilities.invokeLater(new Runnable()
{      
public void run()
{        
new Testing().buildGUI();      
}    
});  
}
}
 
//To set up an array of Images, is just like setting up any other array . . .
//code:
//--------------------------------------------------------------------------------
 
//ImageIcon[] icons = new ImageIcon[78];
//for (int i = 0; i < icons.length; i++)
//{   
//icons[i] = new 
//ImageIcon(String.format("%d.gif", i));   
// You have the same 
//number for the picture as for the array index.   
//c.add(new JButton(icons[i]);
//}

Thank you for your help thus far.

Speak to you later,

Yours
Simon.

[Campbell Ritchie]

Is it working? That is the important thing. I am surprised you can get new ImageIcon("20.gif") and not the String.format bit.
Try a few little programs with String.format like this, and see what happens:

for (int i = 0; i < 78; i++)
{
   System.out.println(String.format("%d.gif", i));
}

Try changing to

String pictureName = String.format("%d.gif", i));
. . . new ImageIcon(pictureName);

[Simon Evans]

Dear Campbell Ritchie,

I am not sure if the program 'Tarot' is working, as it isn't compiling.

If I put code to program Tarot as writ above to the compiler (jdk 1.4 or 1.6) it returns the below:-

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\simon.BLUECHIP-KDOCDA>cd c:\backup\Project Tarot Two

C:\backup\Project Tarot Two>set PATH=C:\Sun\AppServer\jdk\bin;%PATH%


C:\backup\Project Tarot Two>javac Tarot.java
Tarot.java:14: cannot resolve symbol
symbol : method format (java.lang.String,int)
location: class java.lang.String
images[i] = new ImageIcon(String.format("%d.gif",i));
^
1 error

C:\backup\Project Tarot Two>


Anyway I tried recoding it using:

String pictureName = String.format("%d.gif", i));
. . . new ImageIcon(pictureName);

but I am not sure what you mean by pictureName - I tried

newImageIcon([i].gif);

but the compiler didn't accept that either.
Is there a tutorial out there on String formatting ? - so's I could get the hang of it.

Thank you for your help.

Yours,

Simon.

[Campbell Ritchie]

No, I can't think of a String.format tutorial offhand. The method is here and it takes (String, Object ...) as its parameters. There is a little about "formatting numerical output" in the Java� Tutorials, and there is a bit in the Formatter class about what the tags mean.

The format method was introduced in Java5, so it won't work in Java 1.4, but ought to work in Java 6. I copied and pasted your class and the only error I got was "cannot find class Testing," but the compiler was happy with the bit about String.format. Are you sure about your PATH that you aren't using Java 1.4 inadvertently?

[Simon Evans]

Dear Campbell Ritchie,

The compiler return you mentioned was due to my oversight re: the last method, which should've read:-

public void run()
{
new Tarot().buildGUI();
}

Okay, upon changing that, and putting program 'Tarot' to the jdk 1.6, again I got:-


Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Administrator>set PATH=C:\ProgramFiles\Java\jdk1.6.0_0
5\bin;%PATH%

C:\Documents and Settings\Administrator>cd c:\Java\Java Six

C:\Java\Java Six>javac Tarot.java
Tarot.java:14: cannot resolve symbol
symbol : method format (java.lang.String,int)
location: class java.lang.String
images[i] = new ImageIcon(String.format("%d.gif",i));
^
1 error

C:\Java\Java Six>


- to my disappointment.

I seem to remember being told with a previous program ('HorseTraderOrder') that it may've been the jdk - but if the path given didn't point to a javac file, the compiler would say so, but it doesn't,
and the only path offered it was (see above) to the 1.6 version.

Is there an alternative means of doing it?

How did programmers manage such programs before jdk1.6?

The only alternative would seem to be to write pages & pages of repetititious code, which as you said, looks bad.

Hoping to hear.

Thank you for your help.

Yours,

Simon

[Joanne Neal]

It looks like auto boxing doesn't work in this case.
Try

images[i] = new ImageIcon(String.format("%d.gif", new Integer(i)));

[Campbell Ritchie]

I don't think boxing is the answer:

public class FormatTest
{
    public static void main(String[] args)
    {
        for (int i = 0; i < 78; i++)
        {
            System.out.println(String.format("%d.gif", i));
        }//end for
    }//end main
}//end class

campbell@linux-pgix:~/java> gedit FormatTest.java&
[1] 6972
campbell@linux-pgix:~/java> javac FormatTest.java
[1]+ Done gedit FormatTest.java
campbell@linux-pgix:~/java> java FormatTest
0.gif
1.gif
2.gif
3.gif
4.gif
5.gif
etc etc

Simon: please check the method (details here) and try javac -version before compiling again.

[Joanne Neal]

Originally posted by Campbell Ritchie:
I don't think boxing is the answer

You're right. Stupid mistake on my part - I must learn to read errors and not just assume they are the ones I was expecting.

To be absolutely sure of the java version being run, he could add

System.out.println(System.getProperty("java.version"));

somewhere in his code.

[Campbell Ritchie]

Originally posted by Simon Evans:
How did programmers manage such programs before jdk1.6?

String gifName = "" + i + ".gif";
The format method was actually introduced in Java 5 (Autumn 2004).

[Simon Evans]

Dear Campbell Ritchie, Joanne Neale, Michael Dunn and other programmers,

I put the code fragment Joanne suggested I use to establish the jdk

version being used into the program Michael Dunn gave me, ie: 'Testing'

which I know compiles and runs alright:-

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Administrator>cd c:\Java \Java Six

C:\Java\Java Six>set PATH=C:\ProgramFiles\Java\jdk1.6.0_05\bin;%PATH%

C:\Java\Java Six>javac Testing.java

C:\Java\Java Six>java Testing
1.6.0_07

So I take it that the jdk can be established as being the 1.6 version.


I used the code Campbell Ritchie gave as the earlier version of coding

String gifName = "" + i + ".gif";

so that the loop in program Tarot :-

for (int i;i<images.length;i++)
{
images[i] = new ImageIcon(String.format("%d.gif",i));
} ;

then read:-

for (int i;i<images.length;i++)
{
images[i] = new ImageIcon(String gifName = "" + i + ".gif" ;) ;
} ;

however putting that to the same jdk1.6 as above, the console returns:-

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Administrator>cd c:\Java\Java Six

C:\Java\Java Six>set PATH=C:\ProgramFiles\Java\jdk1.6.0_05\bin;%PATH%

C:\Java\Java Six>javac TarotTwo.java
TarotTwo.java:15: ')' expected
images[i] = new ImageIcon(String gifName = "" + i + ".gif" ;) ;
^
TarotTwo.java:15: illegal start of expression
images[i] = new ImageIcon(String gifName = "" + i + ".gif" ;) ;
^
2 errors

C:\Java\Java Six>


Am I coding it wrongly? It is only that line that I have changed, I don't

think there is much point in quoting the entire program again, as the rest

of it is the same as writ for program 'Tarot', as above.

Thank you for your assistance,

Hoping to hear,

Yours

Simon

[edit]Disable Smilies. CR[/edit]
[ August 29, 2008: Message edited by: Campbell Ritchie ]

[Joanne Neal]

You've got an unwanted ;

images[i] = new ImageIcon(String gifName = "" + i + ".gif" ;) ;

Just for future reference, there's a Disable Smilies option (see lower left of edit page) that will stop inappropriate smilies appearing in your post.

[Campbell Ritchie]

If we disable the smilies to get rid of the effect, you see there is an extraneous ; before the ) which the compiler doesn't like.
Get rid of the ; before the ) and it ought to be all right.

[Campbell Ritchie]

And if you are putting "" + i + ".gif" in () you don't need the String gifName = bit.

[Simon Evans]

Dear Campbell Ritchie and Joanne Neale

I have made the alteration/s you recommended.
The Program 'Tarot' now runs, but unfortunately, though it presents the GUI it

doesn't present the gifs - just a blank GUI.

i am not sure where the discrepancy in the code is. The 78 gifs referred to in the

code are in the same location as the few as referred to in program 'Testing' - so

that can't be where the problem is.

Hopefully you could suggest where it is going amiss? - you could try using any 78

gif images to test it with.

I enclose the two programs below, for comparison.

Thank you for your help.

Yours

Simon.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
class Tarot
{  
JLabel animationLabel;
 
public void buildGUI()  
{ 
 
final ImageIcon images[] =  new ImageIcon[78];
 
for (int i =0;i<images.length;i++)
{
images[i] = new ImageIcon( "" + i + ".gif"); 
} ;  
 
JPanel p = new JPanel(new GridLayout(2,0));
JLabel label = new JLabel(images[0]);
JLabel labeltwo = new JLabel(images[0]);         
JFrame f = new JFrame();    
f.getContentPane().add(p);          
f.setSize(100,100);    
f.setLocationRelativeTo(null);    
 
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    
f.setVisible(true);
 
     
final javax.swing.Timer timer = new javax.swing.Timer(500,new ActionListener()
{      
public void actionPerformed(ActionEvent ae)
{        
animationLabel.setIcon(images[(int)(Math.random()*images.length)]);
}    
}); 
   
MouseListener mousie = new MouseAdapter()
{      
public void mouseEntered(MouseEvent me)
{        animationLabel = (JLabel)me.getSource();        
timer.start();      
}  
    
public void mouseExited(MouseEvent me)
{        
if(timer.isRunning()) timer.stop();      
}    
};    
label.addMouseListener(mousie);    
labeltwo.addMouseListener(mousie);  
}  
public static void main(String[] args)  
{    
SwingUtilities.invokeLater(new Runnable()
{      
public void run()
{        
new Tarot().buildGUI();      
}    
});  
}
}
 

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Testing
{  
JLabel animationLabel;
 
public void buildGUI()  
{    
final ImageIcon images[] =    
{      
new ImageIcon("0.gif"),      
new ImageIcon("1.gif"),      
new ImageIcon("2.gif"),      
new ImageIcon("3.gif"),      
new ImageIcon("4.gif"),    
}; 
   
JPanel p = new JPanel(new GridLayout(0,1));    
JLabel label = new JLabel(images[0]);    
JLabel labeltwo = new JLabel(images[0]);    
p.add(label);    p.add(labeltwo);     
JFrame f = new JFrame();    
f.getContentPane().add(p);    
f.setSize(100,100);    
f.setLocationRelativeTo(null);    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    
f.setVisible(true);
     
final javax.swing.Timer timer = new javax.swing.Timer(500,new ActionListener()
{      
public void actionPerformed(ActionEvent ae)
{        
animationLabel.setIcon(images[(int)(Math.random()*images.length)]);
}    
}); 
   
MouseListener mousie = new MouseAdapter()
{      
public void mouseEntered(MouseEvent me)
{        animationLabel = (JLabel)me.getSource();        
timer.start();      
}  
    
public void mouseExited(MouseEvent me)
{        
if(timer.isRunning()) timer.stop();      
}    
};    
label.addMouseListener(mousie);    
labeltwo.addMouseListener(mousie);  
}  
public static void main(String[] args)  
{    
SwingUtilities.invokeLater(new Runnable()
{      
public void run()
{        
new Testing().buildGUI();      
}    
});  
}
}

[Campbell Ritchie]

And if you are using Java 1.6 why on earth can't you get String.format() to work.

Try this little class:

public class StringFormatTest
{
   public static void main(String[] args)
   {
      System.out.println(String.format("%s %s", "Simon", "Evans"));
   }
}

[Simon Evans]

Dear Campbell Ritchie, Joanne Neale, Michael Dunn & other programmers,
I'm sorry, looking at the program 'Tarot' again, I realise I left out the vital line : -

p.add(label); p.add(labeltwo);

Clever, ain't I? Anyway it compiles and runs okay now.
I only have to alter the GridLayout, and it'll be working as desired.
Thank you for your help.
Yours
Simon

[Campbell Ritchie]

At long last. Well done

[Simon Evans]

Dear Campbell Ritchie, and other programmers,

Thank you for your earlier replies.

I put the program StringFormatTester
re:

 
public class StringFormatTest{ 
public static void main(String[] args)   
{      
System.out.println(String.format("%s %s", "Simon", "Evans"));   
}
}
 

to the compiler, and it returned the following:-

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Administrator>cd c:\Java\Java Six

C:\Java\Java Six>set PATH=C:\ProgramFiles\Java\jdk1.6.0_05\bin;%PATH%

C:\Java\Java Six>javac StringFormatTest.java
StringFormatTest.java:5: cannot resolve symbol
symbol : method format (java.lang.String,java.lang.String,java.lang.String)
location: class java.lang.String
System.out.println(String.format("%s %s", "Simon", "Evans"));
^
1 error

C:\Java\Java Six>

I have also put to it the code suggested by Joanne Neal, re:-

 
class Establishjdk
{
public static void main( String args[])
{
System.out.println(System.getProperty("java.version"));
}
}
 

and compiler returns the following:-


C:\Java\Java Six>javac Establishjdk.java

C:\Java\Java Six>java Establishjdk
1.6.0_07

C:\Java\Java Six>



Although it doesn't matter at present, as I have got program 'Tarot' to run.

One thing that might be of relevance, is that if I run it on the jdk1.6 I only get a blank GUI, and its the same with the program 'Testing', but if I run either programs 'Testing' or 'Tarot' on the other jdk (1.4 I believe), then it runs alright and I get a GUI of rows of gif images, which randomly change when the mouse cursor passes over them, as was the desired effect.

I would likke to elaborate on program 'Tarot',so with your acceptance would like to continue with this thread.

I enclose the program as developed at the end of this post, it relates to the six row by seven columned 'Gypsy Spread'.

I want to develop a program derived of the 'Name Spread' which takes the first, middle and surname of a user, and then creates a spread for each of these to a single GUI.

This would require a JOptionPane for the user to input their names, and would return a GUI based on this information.

Hence if for instance I input : Simon Angus Evans, it'd return a GUI of gifs of five columns and three rows, though of course for someone with names of varied length it'd return a GUI of various lengthed rows, anyway I'll try crossing that bridge when I get to it, at present I keep getting an error return on the userinput part of the program - I can't see what I have coded wrongly that I didn't put into previous compiling - and running programs (ie: HorseTraderOrder) but thats the way it seems to be. This is what is confuting the compiler at present:-

 
import javax.swing.*;
import java.util.*;
 
public class NameInput
{
public static void main(Strng args[])
{
String [] usersNames = new String[]
 
String names = JOptionPane.showInputDialog("Dear User, Please enter the number of names you have");
int Names = Integer.parseInt(names);
 
for (int i = 0; i< names; i++)
{
usersNames[i] = JOptionPane.showInputDialog("Dear user, Please enter your names");
}
}
}

which returns the following:-


C:\Java\Java Six>javac NameInput.java
NameInput.java:10: array dimension missing
String names = JOptionPane.showInputDialog("Dear User, Please enter the number o
f names you have");
^
1 error

As mentioned above this is the code to my program 'Tarot' the relevant seventy eight gifs may be downloaded from any of the decks listed at :

http://www.tarot.com/tarot/decks/index.php

which is a non virus infected site.

Thank you for your help.
Yours
Simon.

 
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
class Tarot
{
JLabel animationLabel;
 
public void buildGUI()
{
final ImageIcon images[] = new ImageIcon[78];
for (int i = 0; i< images.length; i++)
{
images[i] = new ImageIcon( " " + i + ".gif");
};
JPanel p = new JPanel(new GridLayout(6,7));
JLabel label = new JLabel(images[0]);
JLabel labeltwo = new JLabel(images[0]);
JLabel labelthree = new JLabel(images[0]);
JLabel labelfour= new JLabel(images[0]);
JLabel labelfive = new JLabel(images[0]);
JLabel labelsix = new JLabel(images[0]);
JLabel labelseven = new JLabel(images[0]);
JLabel labeleight = new JLabel(images[0]);
JLabel labelnine = new JLabel(images[0]);
JLabel labelten = new JLabel(images[0]);
JLabel labeleleven = new JLabel(images[0]);
JLabel labeltwelve = new JLabel(images[0]);
JLabel labelthirteen = new JLabel(images[0]);
JPanel labelfourteen = new JPanel(new GridLayout(6,7));
JLabel labelfifteen = new JLabel(images[0]);
JLabel labelsixteen = new JLabel(images[0]);
JLabel labelseventeen = new JLabel(images[0]);
JLabel labeleighteen = new JLabel(images[0]);
JLabel labelnineteen = new JLabel(images[0]);
JLabel labeltwenty = new JLabel(images[0]);
JLabel labeltwentyone = new JLabel(images[0]);
JLabel labeltwentytwo = new JLabel(images[0]);
JLabel labeltwentythree = new JLabel(images[0]);
JLabel labeltwentyfour = new JLabel(images[0]);
JLabel labeltwentyfive = new JLabel(images[0]);
JLabel labeltwentysix = new JLabel(images[0]);
JLabel labeltwentyseven = new JLabel(images[0]);
JLabel labeltwentyeight = new JLabel(images[0]);
JLabel labeltwentynine = new JLabel(images[0]);
JLabel labelthirty = new JLabel(images[0]);
JLabel labelthirtyone = new JLabel(images[0]);
JLabel labelthirtytwo = new JLabel(images[0]);
JLabel labelthirtythree = new JLabel(images[0]);
JLabel labelthirtyfour = new JLabel(images[0]);
JLabel labelthirtyfive = new JLabel(images[0]);
JLabel labelthirtysix = new JLabel(images[0]);
JLabel labelthirtyseven = new JLabel(images[0]);
JLabel labelthirtyeight = new JLabel(images[0]);
JLabel labelthirtynine = new JLabel(images[0]);
JLabel labelforty = new JLabel(images[0]);
JLabel labelfortyone = new JLabel(images[0]);
JLabel labelfortytwo = new JLabel(images[0]);
 
p.add(label);
p.add(labeltwo);
p.add(labelthree);
p.add(labelfour);
p.add(labelfive);
p.add(labelsix);
p.add(labelseven);
p.add(labeleight);
p.add(labelnine);
p.add(labelten);
p.add(labeleleven);
p.add(labeltwelve);
p.add(labelthirteen);
p.add(labelfourteen);
p.add(labelfifteen);
p.add(labelsixteen);
p.add(labelseventeen);
p.add(labeleighteen);
p.add(labelnineteen);
p.add(labeltwenty);
p.add(labeltwentyone);
p.add(labeltwentytwo);
p.add(labeltwentythree);
p.add(labeltwentyfour);
p.add(labeltwentyfive);
p.add(labeltwentysix);
p.add(labeltwentyseven);
p.add(labeltwentyeight);
p.add(labeltwentynine);
p.add(labelthirty);
p.add(labelthirtyone);
p.add(labelthirtytwo);
p.add(labelthirtythree);
p.add(labelthirtyfour);
p.add(labelthirtyfive);
p.add(labelthirtysix);
p.add(labelthirtyseven);
p.add(labelthirtyeight);
p.add(labelthirtynine);
p.add(labelforty);
p.add(labelfortyone);
p.add(labelfortytwo);
 
JFrame f = new JFrame();
f.getContentPane().add(p);
f.setSize(500,500);
f.setLocationRelativeTo(null);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
 
final javax.swing.Timer timer = new javax.swing.Timer(500,new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
animationLabel.setIcon(images[(int)(Math.random()*images.length)]);
}
}
);
 
MouseListener mousie = new MouseAdapter()
{
public void mouseEntered(MouseEvent me)
{
animationLabel = (JLabel)me.getSource();
timer.start();
}
 
public void mouseExited(MouseEvent me)
{
if (timer.isRunning()) timer.stop();
}
};
label.addMouseListener(mousie);
labeltwo.addMouseListener(mousie);
labelthree.addMouseListener(mousie);
labelfour.addMouseListener(mousie);
labelfive.addMouseListener(mousie);
labelsix.addMouseListener(mousie);
labelseven.addMouseListener(mousie);
labeleight.addMouseListener(mousie);
labelnine.addMouseListener(mousie);
labelten.addMouseListener(mousie);
labeleleven.addMouseListener(mousie);
labeltwelve.addMouseListener(mousie);
labelthirteen.addMouseListener(mousie);
labelfourteen.addMouseListener(mousie);
labelfifteen.addMouseListener(mousie);
labelsixteen.addMouseListener(mousie);
labelseventeen.addMouseListener(mousie);
labeleighteen.addMouseListener(mousie);
labelnineteen.addMouseListener(mousie);
labeltwenty.addMouseListener(mousie);
labeltwentyone.addMouseListener(mousie);
labeltwentytwo.addMouseListener(mousie);
labeltwentythree.addMouseListener(mousie);
labeltwentyfour.addMouseListener(mousie);
labeltwentyfive.addMouseListener(mousie);
labeltwentysix.addMouseListener(mousie);
labeltwentyseven.addMouseListener(mousie);
labeltwentyeight.addMouseListener(mousie);
labeltwentynine.addMouseListener(mousie);
labelthirty.addMouseListener(mousie);
labelthirtyone.addMouseListener(mousie);
labelthirtytwo.addMouseListener(mousie);
labelthirtythree.addMouseListener(mousie);
labelthirtyfour.addMouseListener(mousie);
labelthirtyfive.addMouseListener(mousie);
labelthirtysix.addMouseListener(mousie);
labelthirtyseven.addMouseListener(mousie);
labelthirtyeight.addMouseListener(mousie);
labelthirtynine.addMouseListener(mousie);
labelforty.addMouseListener(mousie);
labelfortyone.addMouseListener(mousie);
labelfortytwo.addMouseListener(mousie);
 
}
 
public static void main(String [] args)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
new Tarot().buildGUI();
}
}
);
}
}
 

[Campbell Ritchie]

There is still something wrong if you can't get a String#format call to compile in Java 6. Look at the details in the String class, and write "javac -version" to your command line.

You are writing " " + i + ".gif" for your Strings; you do realise that inserts a leading space?

I still think you are better with for loops to add Components, not add(panel21); add(panel22);
I usually wouldn't add the same Listener to many Components, but in the case of "mousie" it actually seems to work nicely.
And well done getting it to work in the end

[Joanne Neal]

Originally posted by Simon Evans:

String [] usersNames = new String[]
 
String names = JOptionPane.showInputDialog("Dear User, Please enter the number of names you have");

which returns the following:-

C:\Java\Java Six>javac NameInput.java
NameInput.java:10: array dimension missing
String names = JOptionPane.showInputDialog("Dear User, Please enter the number o
f names you have");
^
1 error

The error is actually on the previous line. Arrays are a fixed size which has to be specified when you create them. So you need something like
String [] usersNames = new String[10];

If you don't know how large your array needs to be then you need to use a List of some kind. ArrayList will probably suit your purpose.

[Simon Evans]

Dear Campbell Ritchie, Joanne Neal & programmers

I have changed the relevant line in program 'Tarot' to:

for (int i = 0; i< images.length; i++)
{
images[i] = new ImageIcon( + i + ".gif");
};

It still produces a blank GUI to the jdk1.6's running of it, though.

I am not sure what its effect on the jdk1.4 is, as the computer holding it is 'down' for the moment, but as it ran okay without changing, it

doesn't apply, I suppose.


I have tried putting the text:- javac -version

to the console, but get:-

javac: invalid flag: -version


along with all the other associated gen that follows such returns.


I agree the program 'Tarot' could do with concertina ing, as the repeated code looks iffy, apart from being a pain to type,

I tried this instead of those three columns of repeated code, ie:-

for (int i = 0; i< 41; i++)
{
JLabel[i] = new JLabel(images[0]);
p.add(JLabel[i]);
JLabel[i].addMouseListener(mousie);
}

but this got me :-

C:\Java\Java Six>javac FT.java
FT.java:21: cannot resolve symbol
symbol : variable JLabel
location: class FT
JLabel[i] = new JLabel(images[0]);
^
FT.java:22: cannot resolve symbol
symbol : variable JLabel
location: class FT
p.add(JLabel[i]);
^
FT.java:23: cannot resolve symbol
symbol : variable mousie
location: class FT
JLabel[i].addMouseListener(mousie);
^
FT.java:23: cannot resolve symbol
symbol : variable JLabel
location: class FT
JLabel[i].addMouseListener(mousie);
^
4 errors

C:\Java\Java Six>

Is my attempt anywhere near or light years out ? (I was wondering).

I have recoded program NameInput in accordance with Joanne's diagnosis, thank you.
re:-

 
import javax.swing.*;
import java.util.*;
 
public class NameInput
{
public static void main(String args[])
{
String names = JOptionPane.showInputDialog("Dear User, Please enter the number of names you have");
int Names = Integer.parseInt(names);
 
String [] usersNames = new String[Names];
 
for (int i = 0; i< Names; i++)
{
usersNames[i] = JOptionPane.showInputDialog("Dear user, Please enter your names");
}
 
int []letters = new int[Names];
 
for (int i = 0; i< Names; i++)
{
 
System.out.println(usersNames[i].length());
}
}
}

Thank you for your help.
Hoping to hear.
Yours
Simon.