Need Small Help with Arrays.

I have this question i wanna ask...Could anyone help me with this code.
Assume that the array arr has been declared. how do i write a statement that assigns the next to last � element of the array to the variable x , which has already been declared.

Of course, if you don't know the size until run time, you'll want to check that the array size is greater than 1, else there won't BE a next to last element.

Similar Messages

Need small help with idvd

im useing idvd to finish this hight light i have made for my aunt and uncles 6man football team and they have 9 players on their team and on the template im useing only has 8 drop boxes i would like to add one more so i can put the players football pictures in there in front of the team photo and dont want to leave one player out if anyone could help me that would be awesome
thank in advance

There's a theme titled Portfolio with 10 photo spaces in the menu drop zone. You could use that and fill in the other 3 with group shots or something similar.
OT

I'm suddenly in need of help with my Firefox browser (6.0.2)

Hi there,
I'm suddenly in need of help with my Firefox browser (6.0.2)
(OS: I use Windows XP).
When I open up the browser, all I see is a completely blank white screen, with all the toolbars at the top.
I know that my physical connections are fine: I've tested the modem, turned the pc off and on etc. and I can also receive/send emails.
This problem started today, 8th September, 2011 and has never happened before.
Is it a coincidence that Firefox updated itself just before I logged off yesterday evening? Could it be something to do with this particular new update?
I've also noted that just before I "open up" Firefox, I now get a small box saying:
[JAVASCRIPT APPLICATION]
Exc In Ev handl: TypeError: This oRoot.enable is not a function
This has never appeared before - I hope it offers a clue a to what is wrong.
The Browser is not stuck in Safe Mode, by the way.
Obviously, I can't search for any solutions to the problem on the internet, as I can't physically see any websites!
(A friend is sending this query on my behalf from their pc)
Any light you could throw on this confusing problem would be much appreciated. I'd rather not have to uninstall and reinstall Firefox if possible.
If the only option is to uninstall Firefox and reinstall it from your site, then I'm also in trouble (I can't see the internet or make any downloads).
In that case, would you be able to send the .exe file as an attachment to my email address? If so, please let me know and I'll give you further details.
Many thanks in advance.

A possible cause is security software (firewall) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
* https://support.mozilla.com/kb/Server+not+found
* https://support.mozilla.com/kb/Firewalls
Start Firefox in <u>[[Safe Mode]]</u> to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.com/kb/Safe+Mode

Please I need some help with a table

Hi All
I need some help with a table.
My table needs to hold prices that the user can update.
Also has a total of the column.
my question is if the user adds in a new price how can i pick up the value they have just entered and then add it to the total which will be the last row in the table?
I have a loop that gets all the values of the column, so I can get the total but it is when the user adds in a new value that I need some help with.
I have tried using but as I need to set the toal with something like total
    totalTable.setValueAt(total, totalTable.getRowCount()-1,1); I end up with an infinite loop.
Can any one please advise on some way I can get this to work ?
Thanks for reading
Craig

Hi there camickr
thanks for the help the other day
this is my full code....
package printing;
import java.awt.*;
import java.awt.event.*;
import java.awt.print.*;
import javax.swing.*;
import javax.swing.table.*;
import java.text.DecimalFormat;
public class tablePanel
    extends JDialog implements Printable {
BorderLayout borderLayout1 = new BorderLayout();
private boolean printing = false;
private Dialog1 dialog;
JPanel jPanel = new JPanel();
JTable table;
JScrollPane scrollPane1 = new JScrollPane();
DefaultTableModel model;
private String[] columnNames = {
private Object[][] data;
private String selectTotal;
private double total;
public tablePanel(Dialog1 dp) {
    dp = dialog;
    try {
      jbInit();
    catch (Exception exception) {
      exception.printStackTrace();
public tablePanel() {
    try {
      jbInit();
    catch (Exception exception) {
      exception.printStackTrace();
private void jbInit() throws Exception {
    jPanel.setLayout(borderLayout1);
    scrollPane1.setBounds(new Rectangle(260, 168, 0, 0));
    this.add(jPanel);
    jPanel.add(scrollPane1, java.awt.BorderLayout.CENTER);
    scrollPane1.getViewport().add(table);
    jPanel.setOpaque(true);
    newTable();
    addToModel();
    addRows();
    setTotal();
public static void main(String[] args) {
tablePanel tablePanel = new tablePanel();
tablePanel.pack();
tablePanel.setVisible(true);
public void setTotal() {
total = 0;
int i = table.getRowCount();
for (i = 0; i < table.getRowCount(); i++) {
    String name = (String) table.getValueAt(i, 1);
    if (!"".equals(name)) {
      if (i != table.getRowCount() - 1) {
        double dt = Double.parseDouble(name);
        total = total + dt;
String str = Double.toString(total);
table.setValueAt(str, table.getRowCount() - 1, 1);
super.repaint();
public void newTable() {
    model = new DefaultTableModel(data, columnNames) {
    table = new JTable() {
      public Component prepareRenderer(TableCellRenderer renderer,
                                       int row, int col) {
        Component c = super.prepareRenderer(renderer, row, col);
        if (printing) {
          c.setBackground(getBackground());
        else {
          if (row % 2 == 1 && !isCellSelected(row, col)) {
            c.setBackground(getBackground());
          else {
            c.setBackground(new Color(227, 239, 250));
          if (isCellSelected(row, col)) {
            c.setBackground(new Color(190, 220, 250));
        return c;
    table.addMouseListener(new MouseAdapter() {
      public void mouseClicked(MouseEvent e) {
        if (e.getClickCount() == 2) {
        if (e.getClickCount() == 1) {
          if (table.getSelectedColumn() == 1) {
   table.setTableHeader(null);
    table.setModel(model);
    scrollPane1.getViewport().add(table);
    table.getColumnModel().getColumn(1).setCellRenderer(new TableRenderDollar());
public void addToModel() {
    Object[] data = {
        "Price", "5800"};
    model.addRow(data);
public void addRows() {
    int rows = 20;
    for (int i = 0; i < rows; i++) {
      Object[] data = {
      model.addRow(data);
public void printOut() {
    PrinterJob pj = PrinterJob.getPrinterJob();
    pj.setPrintable(tablePanel.this);
    pj.printDialog();
    try {
      pj.print();
    catch (Exception PrintException) {}
public int print(Graphics g, PageFormat pageFormat, int pageIndex) throws PrinterException {
    Graphics2D g2 = (Graphics2D) g;
    g2.setColor(Color.black);
    int fontHeight = g2.getFontMetrics().getHeight();
    int fontDesent = g2.getFontMetrics().getDescent();
    //leave room for page number
    double pageHeight = pageFormat.getImageableHeight() - fontHeight;
    double pageWidth = pageFormat.getImageableWidth();
    double tableWidth = (double) table.getColumnModel().getTotalColumnWidth();
    double scale = 1;
    if (tableWidth >= pageWidth) {
      scale = pageWidth / tableWidth;
    double headerHeightOnPage = 16.0;
    //double headerHeightOnPage = table.getTableHeader().getHeight() * scale;
    //System.out.println("this is the hedder heigth   " + headerHeightOnPage);
    double tableWidthOnPage = tableWidth * scale;
    double oneRowHeight = (table.getRowHeight() + table.getRowMargin()) * scale;
    int numRowsOnAPage = (int) ( (pageHeight - headerHeightOnPage) / oneRowHeight);
    double pageHeightForTable = oneRowHeight *numRowsOnAPage;
    int totalNumPages = (int) Math.ceil( ( (double) table.getRowCount()) / numRowsOnAPage);
    if (pageIndex >= totalNumPages) {
      return NO_SUCH_PAGE;
    g2.translate(pageFormat.getImageableX(), pageFormat.getImageableY());
//bottom center
    g2.drawString("Page: " + (pageIndex + 1 + " of " + totalNumPages), (int) pageWidth / 2 - 35, (int) (pageHeight + fontHeight - fontDesent));
    g2.translate(0f, headerHeightOnPage);
    g2.translate(0f, -pageIndex * pageHeightForTable);
    //If this piece of the table is smaller
    //than the size available,
    //clip to the appropriate bounds.
    if (pageIndex + 1 == totalNumPages) {
      int lastRowPrinted =
          numRowsOnAPage * pageIndex;
      int numRowsLeft =
          table.getRowCount()
          - lastRowPrinted;
      g2.setClip(0,
                 (int) (pageHeightForTable * pageIndex),
                 (int) Math.ceil(tableWidthOnPage),
                 (int) Math.ceil(oneRowHeight *
                                 numRowsLeft));
    //else clip to the entire area available.
    else {
      g2.setClip(0,
                 (int) (pageHeightForTable * pageIndex),
                 (int) Math.ceil(tableWidthOnPage),
                 (int) Math.ceil(pageHeightForTable));
    g2.scale(scale, scale);
    printing = true;
    try {
    table.paint(g2);
    finally {
      printing = false;
    //tableView.paint(g2);
    g2.scale(1 / scale, 1 / scale);
    g2.translate(0f, pageIndex * pageHeightForTable);
    g2.translate(0f, -headerHeightOnPage);
    g2.setClip(0, 0,
               (int) Math.ceil(tableWidthOnPage),
               (int) Math.ceil(headerHeightOnPage));
    g2.scale(scale, scale);
    //table.getTableHeader().paint(g2);
    //paint header at top
    return Printable.PAGE_EXISTS;
class TableRenderDollar extends DefaultTableCellRenderer{
    public Component getTableCellRendererComponent(
      JTable table,
      Object value,
      boolean isSelected,
      boolean isFocused,
      int row, int column) {
        setHorizontalAlignment(SwingConstants.RIGHT);
      Component component = super.getTableCellRendererComponent(
        table,
        value,
        isSelected,
        isFocused,
        row,
        column);
        if( value == null || value .equals("")){
          ( (JLabel) component).setText("");
        }else{
          double number = 0.0;
          number = new Double(value.toString()).doubleValue();
          DecimalFormat df = new DecimalFormat(",##0.00");
          ( (JLabel) component).setText(df.format(number));
      return component;
}

Need small help

Hi,
I need small help in sql*loader.I get data-files which has a particular identified on the 1st record( header ), based on which I've to load a constant for the 1st column of every row. How do I set in the control file.
Appreciate if someone can give me directions on this.
Thanks in advance,

Hi again!
I hope that a little shell script will do the thing for you.
1.) Create the following BASH-Script
#!/bin/bash
export CUSTNO=""
export CUSTNO=$(awk -F"," '{print NR " " $3}' datafile.csv | grep 1 | cut -d" " -f2)
sed -i 's/#x#/'$CUSTNO'/g' controlfile.datI've use datafile.csv as the name of the datafile to load and controlfile.dat as the name of your controlfile. Please change this to fit your needs.
This script looks for the occurrence of your constant value and stores this value in the variable CUSTNO. Then it look for a string #x# in your controlfile and changes #x# to the value of CUSTNO.
So in your controlfile there should be a line for custno like that:
custno CONSTANT '#x#'This line will be replace in your example to:
custno CONSTANT '35642'To get this to work I assume that:
1.) Your constant value is always at the third position in the header of your datafile.
2.) You've made the change with #x# in your controlfile.
I hope that this is really usefull to you.
Best Regards
Florian W.

Help with array question

hi,
i need some help with this piece of code. wat would it output to the screen?
int [] theArray = { 1,2,3,4,5};
for (int i = 1; i < 5; i++)
System.out.print(theArray * i + "; ");
would it output 1 * 1;
2 * 2;...
thanx
devin

Ok...
1] Your index into the array is off by 1 - remember that array indexing starts from 0.
2] You cannot multiply an array object. The contents? fine , go ahead but NOT the array
so your output should be something like:
operator * cannot be applied to int[] :d
try
int[] theArray = {0,1,2,3,4,5};
for(int i = 1;i<6;i++)
System.out.print(theArray*i+";");
giving you an output of 1;4;9;16;n...
if you were looking for the output stated change
System.out.print(theArray*i+";");
to
System.out.print(theArray[i]+"*"+i+";");done...

Error 1603: Need some help with this one

When installing iTunes I first get an error box saying
"Error 1406: Could not write value to key \Software\classes\.cdda\OpenWithList\iTunes.exe. Verify that you have sufficient access to that key, or contact your support personnel."
The second one (after I click on Ignore on the last box) I get it this one:
"Error: -1603 Fatal error during installation.
Consult Windows Installer Help (Msi.chm) or MSDN for more information"
Strange thing is that I do have full access to my computer (or atleast in all other cases I have had since I am the only one with an account on it).
I have done my best in trying to solve it myself but I'm running out of ideas. I have downloaded latest versions from the website and tried installing Quicktime separately. I have also tried removing Quicktime using add/or remove programs though I just I didn't dare to take full removal because it said something about system files.
Anyway I really need some help with this, anyone got any ideas?
Greets,
Sixten
Windows XP Pro

Do you know how to count backwards? Do you know how to construct a loop? Do you know what an autodecrementor is? Do you know how to use String length? Do you know Java arrays start with index 0 and run to length-1? Do you know you use length on arrays too? Do you know what System.out.println does?
Show us what you have, there isn't anything here that isn't easily done the same as it would be on paper.

Please Help With Arrays

I really need some help with the following two methods:
- A method fillArray() that accepts an integer array as a parameter and fills the array with random integers. I am encouraged to use Math.random()
- A method printArray() that accepts an integer array as a parameter and outputs every element of the array to the standard output device. I am encouraged to use print instead of println in order to save paper.
Thanks so much for your help.

public class Test {
   public static void main (String[] args){
       int[] intArray = new int[20];
       fillArray(intArray);
       printArray(intArray);
   public static void fillArray (int[] intArray){
       for (int i = 0; i < intArray.length; i++) {
           intArray[i] = (int) (Math.random()*1000);
   public static void printArray (int[] intArray){
       for (int i = 0; i < intArray.length; i++) {
           int i1 = intArray;
System.out.print(i1+",");
System.out.println("");

I need your help with a decision to use iPhoto. I have been a PC user since the mid 1980's and more recently have used ACDSee to manage my photo images and Photoshop to edit them. I have used ProShow Gold to create slideshows. I am comfortable with my

I need your help with a decision to use iPhoto. I have been a PC user since the mid 1980’s and more recently have used ACDSee to manage my photo images and Photoshop to edit them. I have used ProShow Gold to create slideshows. I am comfortable with my own folder and file naming conventions. I currently have over 23,000 images of which around 60% are scans going back 75 years. Since I keep a copy of the originals, the storage requirements for over 46,000 images is huge. 180GB plus.
I now have a Macbook Pro and will add an iMac when the new models arrive. For my photos, I want to stay with Photoshop which also gives me the Bridge. The only obvious reason to use iPhoto is to take advantage of Faces and the link to iMovie to make slideshows. What am I missing and is using iPhoto worth the effort?
If I choose to use iPhoto, I am not certain whether I need to load the originals and the edited versions. I suspect that just the latter is sufficient. If I set PhotoShop as my external editor, I presume that iPhoto will keep track of all changes moving forward. However, over 23,000 images in iPhoto makes me twitchy and they are appear hidden within iPhoto. In the past, I have experienced syncing problems with, and database errors in, large databases. If I break up the images into a number of projects, I loose the value of Faces reaching back over time.
Some guidance and insight would be appreciated. I have a number of Faces questions which I will save for later.

Bridge and Photoshop is a common file-based management system. (Not sure why you'd have used ACDSEE as well as Bridge.) In any event, it's on the way out. You won't be using it in 5 years time.
Up to this the lack of processing power on your computer left no choice but to organise this way. But file based organisation is as sensible as organising a Shoe Warehouse based on the colour of the boxes. It's also ultimately data-destructive.
Modern systems are Database driven. Files are managed, Images imported, virtual versions, lossless processing and unlimited editing are the way forward.
For a Photographer Photoshop is overkill. It's an enormously powerful app, a staple of the Graphic Designers' trade. A Photographer uses maybe 15% to 20% of its capability.
Apps like iPhoto, Lightroom, Aperture are the way forward - for photographers. There's the 20% of Photoshop that shooters actually use, coupled with management and lossless processing. Pop over to the Aperture or Lightroom forums (on the Adobe site) and one comment shows up over and over again... "Since I started using Aperture/ Lightroom I hardly ever use Photoshop any more..." and if there is a job that these apps can do, then the (much) cheaper Elements will do it.
The change is not easy though, especially if you have a long-standing and well thought out filing system of your own. The first thing I would strongly advise is that you experiment before making any decisions. So I would create a Library, import 300 or 400 shots and play. You might as well do this in iPhoto to begin with - though if you’re a serious hobbyist or a Pro then you'll find yourself looking further afield pretty soon. iPhoto is good for the family snapper, taking shots at birthdays and sharing them with friends and family.
Next: If you're going to successfully use these apps you need to make a leap: Your files are not your Photos.
The illustration I use is as follows: In my iTunes Library I have a file called 'Let_it_Be_The_Beatles.mp3'. So what is that, exactly? It's not the song. The Beatles never wrote an mp3. They wrote a tune and lyrics. They recorded it and a copy of that recording is stored in the mp3 file. So the file is just a container for the recording. That container is designed in a specific way attuned to the characteristics and requirements of the data. Hence, mp3.
Similarly, that Jpeg is not your photo, it's a container designed to hold that kind of data. iPhoto is all about the data and not about the container. So, regardless of where you choose to store the file, iPhoto will manage the photo, edit the photo, add metadata to the Photo but never touch the file. If you choose to export - unless you specifically choose to export the original - iPhoto will export the Photo into a new container - a new file containing the photo.
When you process an image in iPhoto the file is never touched, instead your decisions are recorded in the database. When you view the image then the Master is presented with these decisions applied to it. That's why it's lossless. You can also have multiple versions and waste no disk space because they are all just listings in the database.
These apps replace the Finder (File Browser) for managing your Photos. They become the Go-To app for anything to do with your photos. They replace Bridge too as they become a front-end for Photoshop.
So, want to use a photo for something - Export it. Choose the format, size and quality you want and there it is. If you're emailing, uploading to websites then these apps have a "good enough for most things" version called the Preview - this will be missing some metadata.
So it's a big change from a file-based to Photo-based management, from editing files to processing Photos and it's worth thinking it through before you decide.

I've just came on board from Andriod and need massive help with the Contacts application any one out there willing to help the 'noob'?

I had the folks at the store port over all of my contacts from my old
ratty Andriod phone to my new shiny iPhone.
however all 200+ of my contacts sort of "shook" out,
meaning say John Smith, on my old phone,
had in my contacts the following:
John Smith
123 Main St. Anytown, Anystate USA
555-826-4879 home
555-799-4247 cell
[email protected]
johnsmith@facebook
all nice and neat on my andriod but when it ported over
all that information was just scattered all over my contacts sort of like:
john smith, smith john
john smith 123 main st. etc.
johhn smith home 555 etc.
john smith cell 555 etc.
john smith johnsmith@ etc.
etc.
so for all those 200+ contacts in my phone, I've got a zillion of them now...
so I'd like to get this all back in order before I and Siri explode.
I know nothing, and I know even less about outlook and the sort.
But I do know I am in Dire need of help with this... I figured that eveything else
involving iphones and apple in general was supposed to be cake but it seems
like this is the only thing that isn't cake at all... unless, I'm just a right idiot. (which is possible, hence spelling and grammatical issues).

I believe I've tried to sync it with google, but it didn't seem to take
muchless take my calender. it seems to favor my facebook calender
more over my google calender, but Siri seems to be helping me re-write
it...but that's not the game here, it's the contacts. I've tried to export
the cvp (??) list and import it into my iTunes account. However, It only
doubled my issue because it didn't over write my existing contacts.

Need some help with a Macally enclosure and a spare internal drive

Need some help with a Macally enclousure
Posted: Oct 1, 2010 10:55 AM
Reply Email
Aloha:
I have a Macally PHR-S100SUA enclousure that does not recognise,my WD 1001fals hard drive. It has worked just fine with other internal drives, but not this one?
This is a spare internal drive that I am trying to make an external drive to store back ups for a lot of data. But so far I can not get it recognized by the computer. Maybe I need different drivers?
Any suggestions?
Dan Page

Hi-
Drivers aren't typically needed for external enclosures.
Macally has none listed for that enclosure.
The same is true for the WD drive, internal or external; no drivers.
With the exception of high end PM multi drive enclosures, I can't think of any that use drivers.
How is the external connected?
Have you tried different cables, different ports?
Bad/damaged cables are fairly common.
Have you verified connections inside of the enclosure?

Need some help with putting a folder in users directory

I'm not sure how to do this, but what I want to do is put this file in C:/My Documents, but I need to be able to verify that C://My Documents exists, if not put it in C:/Program Files.
Can any one help me out?
try {
                    String[] contactArray = parseDatFile(fc.getSelectedFile());
                    Document document = createXMLDocument(contactArray);
                    saveToXMLFile(
                    document,
                    new File(
                    "C:/Program Files/xxx/",// looks for directory for list
                    "xxxxxxxxxxxxxxxxxxxxxxxxxxxx"));
                } catch (Exception exc) {
                    File f = new File("C:/Program Files/xxx/");// setting directory for list if not there
                    boolean yes = true;
                    yes = f.mkdir();// creating directory
                    try {
                        String[] contactArray = parseDatFile(fc.getSelectedFile());
                        Document document = createXMLDocument(contactArray);
                        saveToXMLFile(
                        document,
                        new File(
                        "C:/Program Files/xxx/",// used only if the directory didn't exist
                        "xxxxxxxxxxxxxxxxxxxxxxx"));

Need some help with putting a folder in users directoryI recomend using System.getProperty( "user.home" ) not a hard-coded value.
This will use the users home folder ( C:\My Documents ) on Win9X (I guess), C:\Documents and Settings\<current user> on Win2K +, and ~ on Unix-a-likes.

Need some help with downloading PDF's from the net.

need some help with downloading PDF's from the net. Each time I try to click on a link from a website, if it takes me to a new screen to view a pdf, it just comes up as a blank black screen? any suggestions?

Back up all data.
Triple-click the line of text below to select it, the copy the selected text to the Clipboard (command-C):
/Library/Internet Plug-ins
In the Finder, select
Go ▹ Go to Folder
from the menu bar, or press the key combination shift-command-G. Paste into the text box that opens (command-V), then press return.
From the folder that opens, remove any items that have the letters “PDF” in the name. You may be prompted for your login password. Then quit and relaunch Safari, and test.
The "Silverlight" web plugin distributed by Microsoft can also interfere with PDF display in Safari, so you may need to remove it as well, if it's present.
If you still have the issue, repeat with this line:
~/Library/Internet Plug-ins
If you don’t like the results of this procedure, restore the items from the backup you made before you started. Relaunch Safari again.

Need some help with the Select query.

Need some help with the Select query.
I had created a Z table with the following fields :
ZADS :
MANDT
VKORG
ABGRU.
I had written a select query as below :
select single vkorg abgru from ZADS into it_rej.
IT_REJ is a Work area:
DATA : BEGIN OF IT_REJ,
        VKORG TYPE VBAK-VKORG,
        ABGRU TYPE VBAP-ABGRU,
       END OF IT_REJ.
This is causing performance issue. They are asking me to include the where condition for this select query.
What should be my select query here?
Please suggest....
Any suggestion will be apprecaiated!
Regards,
Developer

Hello Everybody!
Thank you for all your response!
I had changes this work area into Internal table and changed the select query. PLease let me know if this causes any performance issues?
I had created a Z table with the following fields :
ZADS :
MANDT
VKORG
ABGRU.
I had written a select query as below :
I had removed the select single and insted of using the Structure it_rej, I had changed it into Internal table
select vkorg abgru from ZADS into it_rej.
Earlier :
IT_REJ is a Work area:
DATA : BEGIN OF IT_REJ,
VKORG TYPE VBAK-VKORG,
ABGRU TYPE VBAP-ABGRU,
END OF IT_REJ.
Now :
DATA : BEGIN OF IT_REJ occurs 0,
VKORG TYPE VBAK-VKORG,
ABGRU TYPE VBAP-ABGRU,
END OF IT_REJ.
I guess this will fix the issue correct?
PLease suggest!
Regards,
Developer.

Need some help with threads...

Hello all,
I am working on a project at work, and I am not the best programmer in the world. I have been trying to get my head around this for a couple of days and just cannot get it to work.
I am writing an instrumentation control program that will have three threads. One is the GUI, one will receive control information and set up the hardware, and one will check the hardware status and report it to the GUI periodically. I plan on using the invokeLater() method to communicate the status to the GUI and change the status display in the GUI. Communication from the GUI to the controller thread and from the status thread to the controller thread I had planned on being piped input/output stream as appropriate. I have a control class and a status class that need to be communicated over these piped streams. In some trial code I have been unable to wrap the piped input/output streams with object input/output streams. I really need some help with this. Here is the main thread code:
package playingwiththreads1;
import java.io.*;*
*public class PlayingWithThreads1 {*
public static void main(String[] args) {*
* PipedOutputStream outputPipe = new PipedOutputStream();*
* ObjectOutputStream oos = null;*
* ReceiverThread rt = new ReceiverThread(outputPipe);*
// Start the thread -- First try*
* Thread t = new Thread(rt);*
t.start();*
// Wrap the output pipe with an ObjectOutputStream*
try*
oos = new ObjectOutputStream(outputPipe);*
catch (IOException e)*
System.out.println(e);*
// Start the thread -- Second try*
//Thread t = new Thread(rt);*
//t.start();*
/** Send an object over the pipe. In reality this object will be a
class that contains control or status information */
try
if (!oos.equals(null))
oos.writeObject(new String ("Test"));
catch (IOException e)
try
Thread.sleep(5000);
catch (InterruptedException e)
I read somewhere that it matters where you start the thread relative to where you wrap piped streams with the object streams. So, I tried the two places I felt were obvious to start the thread. These are noted in the comments. Here is the code for the thread.
package playingwiththreads1;
import java.io.*;
public class ReceiverThread implements Runnable {
private PipedInputStream inputPipe = new PipedInputStream();
private ObjectInputStream inputObject;
ReceiverThread (PipedOutputStream outputPipe)
System.out.println("Thread initialization - start");
try
inputPipe.connect(outputPipe);
inputObject = new ObjectInputStream(inputPipe);
catch (IOException e)
System.out.println(e);
System.out.println("Thread initialization - complete");
public void run()
System.out.println("Thread started");
try
if (inputObject.available() > 0)
System.out.println(inputObject.read());
catch (IOException e)
System.out.println(e);
Through testing I have determined that no matter where I start the thread, the thread never gets past the "inputObject = new ObjectInputStream(inputPipe);" assignment.
Could someone please help me with this? There are other ways for me to write this program, but this is the one that I would like to make work.
Many thanks in advance,
Rob Hix
Edited by: RobertHix on Oct 6, 2009 3:54 AM

Thanks for the help, but that did not work. I tried flushing the ObjectOutputStream and it is still hanging when initializing the thread.
Here is a better look at the code since I was helped to figure out how to insert it:
The main method:
package playingwiththreads1;
import java.io.*;
public class PlayingWithThreads1 {
    public static void main(String[] args) {
        PipedOutputStream outputPipe = new PipedOutputStream();
        ObjectOutputStream oos = null;
        ReceiverThread rt = new ReceiverThread(outputPipe);
        // Start the thread -- First try
        //Thread t = new Thread(rt);
        //t.start();
        // Wrap the output pipe with an ObjectOutputStream
        try
            oos = new ObjectOutputStream(outputPipe);
            oos.flush();
        catch (IOException e)
            System.out.println(e);
        // Start the thread -- Second try
        Thread t = new Thread(rt);
        t.start();
        /* Send an object over the pipe. In reality this object will be a
         * class that contains control or status information */
        try
            if (!oos.equals(null))
                oos.writeObject(new String ("Test"));
                oos.flush();
        catch (IOException e)
            System.out.pringln(e);
        try
            Thread.sleep(5000);
        catch (InterruptedException e)
}The thread code:
package playingwiththreads1;
import java.io.*;
public class ReceiverThread implements Runnable {
    private PipedInputStream inputPipe = new PipedInputStream();
    private ObjectInputStream inputObject;
    ReceiverThread (PipedOutputStream outputPipe)
        System.out.println("Thread initialization - start");
        try
            inputPipe.connect(outputPipe);
            inputObject = new ObjectInputStream(inputPipe);
        catch (IOException e)
            System.out.println(e);
        System.out.println("Thread initialization - complete");
    public void run()
        System.out.println("Thread started");
        try
            if (inputObject.available() > 0)
                System.out.println(inputObject.read());
        catch (IOException e)
            System.out.println(e);
}Does anyone else have and ideas?

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