Help with writing, reading a file...

I'm writing a program that writes a number to a file and then reads it again each time it is loaded. It's like a counter, the number starts out being 0, then when the program is run again the number will be two, and so on and so on. I've never been good with writing incrementer type things and files, so could you help me out? Remember, the program writes a single number to the file, and then adds one to that number each time the program is run, so it starts at zero and goes up by one each time it is run.
-Thanks... I just came back from vacation and my Java skills are somewhat lacking :P

open old file -> get the number -> create a new file -> write new number

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Help with writing a batch file

Hi :
does anyone know anyplace online that I can get help in writing batch files?? I have never worked much with batch files before....
any help is greatly appreciated
thnx

I suppose, since you're in a Java forum, you need batch files to load java applications.
If you use windows :
go to ms console (start/run/"cmd")
type edit mybatch.bat
write your command to load a java application, something like
java myclass.class
save and exit.
Be sure the bat file and the class are in the same folder.
And make certain you've set the classpath, and path variables correctly.
If this was what you needed and you need more help just ask.
(In this case it could be better to make executable jars)
If you wanted to know about linux batches, it works pretty the same way.

Help with utl_file (read/write file from local directory)

Need help reading/writing file on local machine from plsql using 10.2 DB.
I am trying to read/write a file from a local directory(laptop) without success.
I have been able to read/write to the database server directory but can't write to directory on local machine.
The utl_file_dir parm has been set to * and the db restarted but I can't get it to work... Here's the plsql statement.
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Whenever I run it continues to write to c:\PLSQL dir on the database server. Have looked at the "Directory" object and created MY_DIR = C:\PLSQL but it writes to the db server.
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I don't see how you expect the server to be able to see your laptop across the network, hack into it and start writing files. Even if it could, what if there is more than one laptop with a C: drive? How would it know which one to write to?
Is there a shared drive on the server you can access via the laptop?

Need help with writing to a file

I am writing a program that is a file sharing program where i read in bytes from a socket in a BufferedReader into a char[]. Then i want to write to a file using FileOutputStream which only lets me write with a byte[]. Is there a way to read in the info into a byte[] rather a char[]?

may be this code helps
import java.io.*;
public class cp
        public static void main(String args[])
                try
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                FileReader fr=new FileReader(my);
                BufferedReader br=new BufferedReader(fr);
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fw.write(a);
fw.close();
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Help with writing to a file

First off...I'm just a student so please bear with me...
I'm having problems with the following bit of code. I don't seem to be understanding the correct way to write to a file. It's not a complete program and my drop down box isn't set up to write yet...but I'm just trying to get SOMETHING as output to the file. Any help is appreciated! Here's my code:
Mid-Term Test
Programmer: Abraham Violett
Date: 8-12-04
Filename: MowersInc.java
Purpose: This will be a data entry and retrival system
for a
small lawn mowing company.
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
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JLabel titleLabel = new JLabel(" Mowers Incorporated");
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JTextField firstNameTextField = new JTextField(15);
JTextField lastNameTextField = new JTextField(15);
JLabel lastNameLabel = new JLabel("Last Name:");
JComboBox lawnSizeCombo = new JComboBox();
JButton submitInfoButton = new JButton("Submit");
JButton clearInfoButton = new JButton("Clear");
DataOutputStream output;
public MowersInc()
super("Mowers Inc.");
try
output = new DataOutputStream(new FileOutputStream("customers.dat"));
catch(IOException io)
JOptionPane.showMessageDialog(null, "Could not create storage location.", "Error", JOptionPane.INFORMATION_MESSAGE);
System.exit(1);
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public void actionPerformed(ActionEvent e)
String arg = e.getActionCommand();
int fee;
if (e.getSource() == lawnSizeCombo)
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case 0:
fee = 50;
break;
case 1:
fee = 75;
break;
default:
break;
if(arg == "Submit")
try
output.writeUTF(firstNameLabel.getText());
output.writeUTF(lastNameLabel.getText());
catch(IOException io)
JOptionPane.showMessageDialog(null, "Could not create storage location.", "Error", JOptionPane.INFORMATION_MESSAGE);
System.exit(1);
public Container createContentPane()
lawnSizeCombo.addItem("Please select Lawn Size...");
lawnSizeCombo.addItem("Lawn less than 1000 sq/ft.");
lawnSizeCombo.addItem("Lawn more than 1000 sq/ft.");
lawnSizeCombo.addActionListener(this);
JPanel mainPanel = new JPanel();
mainPanel.add(titleLabel);
mainPanel.add(blankLabel);
mainPanel.add(firstNameLabel);
mainPanel.add(firstNameTextField);
mainPanel.add(lastNameLabel);
mainPanel.add(lastNameTextField);
mainPanel.add(lawnSizeCombo);
mainPanel.add(blankLabel);
mainPanel.add(submitInfoButton);
mainPanel.add(clearInfoButton);
lawnSizeCombo.setToolTipText("Select the appropriate lawn size from this list.");
mainPanel.setLayout(new FlowLayout());
//mainPanel.setLayout(new GridLayout(6, 2, 10, 10));
return mainPanel;
public static void main(String args[])
MowersInc test = new MowersInc();
test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
test.setContentPane(test.createContentPane());
test.setSize(200, 215);
test.setVisible(true);
//lawnSize.addItem("Less than 1000 sqr/ft.");
//lawnSize.addItem("More than 1000 sqr/ft.");
}

Use a program development method called Stepwise
Refinement. Start out with a small working program.
Then expand it little by little and in each step make
sure that it works and you understand why. Very soon
you have a big working program. Try it, it always
works -:)Pay heed to UlrikaJ -:) sweety's advice, you'll be happy! ;-)
UlrikaJ cutie would you like to go out with me someday? : )

Required help with writing to a file.. urgent plz help

Hello Everyone,
I am using the following code to write data to a particular file..
I have 2 wfms, pressure and torque, the pressure is a simple one...
THe torque is bit complex, the operator has to press the "Start/Stop Torque DAQ" button and then select a filename... Next, he has to press the "Run/Stop Test"
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Attachments:
RCD_v002.vi ‏129 KB

Hh Crack Jack,
Try this...
<<Kudos are welcome>>
ELECTRO SAM
For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life.
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Thanks.

Hi Paul,
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export CLICOLOR=""
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Gary
~~~~
   I know you think you thought you knew what you
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Help with writing and retrieving data from a table field with type "LCHR"

Hi Experts,
I need help with writing and reading data from a database table field which has a type of "LCHR". I have given an example of the original code but don't know what to change it to in order to fix it and still read in the original data that's stored in the LCHR field.
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C
SAVING THE LIST DATA TO DB
DATA: L_WA(800).
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MOVE: L_WA to ZDBTAB-RAWDATA.
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Hi Anuj,
The unicode flag is active.
When I run our report and then to try and save the list data a dump is happening at the following point
LOOP AT T_TAB into L_WA.
As I say, T_TAB consists of different fields and field types whereas L_WA is CHAR 800. The dump mentions UC_OBJECTS_NOT_CONVERTIBLE
When I try to load a saved list the dump is happening at the following point
APPEND T_DATA-RAWDATA to T_TAB.
T_DATA-RAWDATA is type LCHR and T_TAB consists of different fields and field types.
In both examples the dumps mention UC_OBJECTS_NOT_CONVERTIBLE
Regards
C

Help with writing a formula

Hi all,
I am creating a report, and need help with writing a formula...
I am creating a report that shows how many visits/touches our reps have made to various grade accounts. It is broken down by calendar week, and I currently have a weekly "goal" number set that the reps have to meet. That "goal" number increases each week to keep a running total. (example: week 1: 7, week 2: 14, week 3: 21)
I have created some different formulas and one is this:
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What this shows me is how many "visits" there are per calendar week to customers, however it show me the total for all reps per week.
What I need is that total to show, but totaled for each rep individually.
What I was trying is this:
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I have the reporting book by Lairson, and have been referring to it...but my brain at this point is fried.
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Thanks for helping!
I created this formula as a column: SUM ("Activity Metrics"."# of Activities" BY Date."Calendar Week"), it is called "total number of visits per week" and it shows the totaled number of visits that all the reps have done per calendar week. For example: Week 1: 10 visits, Week 2: 37 visits, Week 3: 20 visits.
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I think I am getting the error because you can't use "BY" twice in a formula?

Help with Adobe Reader update installation on mac book pro

am trying to update adobe reader 9.4.6 to the latest version on my mac book pro. Am able to download the updtae to 10. whatever and proceed with installation. At the step where I am asked to choose the adobe reader file, I select the file and then the process stops and I get a message that installation has failed and i am to contact the software manufacturer.

I figured it out. Thanks!
The key, during both life and death, is to recognize illusions as illusions, projections as projections, and fantasies as fantasies. In this way we become free.
Date: Mon, 10 Sep 2012 04:54:45 -0600
From: [email protected]
To: [email protected]
Subject: Help with Adobe Reader update installation on mac book pro
    Re: Help with Adobe Reader update installation on mac book pro
    created by Nikhil.Gupta in Adobe Reader - View the full discussion
How exactly are you trying to update your Adobe Reader 9.4.6Try the following link to download latest Adobe Raeader: http://get.adobe.com/reader/
     Replies to this message go to everyone subscribed to this thread, not directly to the person who posted the message. To post a reply, either reply to this email or visit the message page: http://forums.adobe.com/message/4686315#4686315
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Help with converting a Nero file

I have previously converted a dvd insert designed with Nero into a pdf using adobe acrobat in order to send to someone else. When I tried to do the same thing today with a new Nero designed insert the conversion wouldn't work. The message said adobe didn't support the program that created the file. Any ideas?

thanks for your response.
When I create a dvd insert or cd label etc using Nero the file extension is nct - nero cover template. The printer wants the file as a pdf as he can't open Nero files. I have version 9.3 of acrobat.
Date: Mon, 18 Jan 2010 21:43:47 -0700
From: [email protected]
To: [email protected]
Subject: help with converting a Nero file
Nero is simply a CD/DVD burning application and should have no effect on the type of files that will eventually be on the CD/DVD.
What type of files are you trying to convert and exactly how are you trying to convert them? Plus, it would help to know the version of Acrobat you are using.
>

I had to put my computer by together without migration or time machine I NEED help with order of the files?

I had to put my computer by together without migration or time machine I NEED help with order of the files?

Hi, where are these other files exactly?

Help in writing to a file with newline facility

I am using the RandomAccessFile class to write to a file.
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KEY=VALUE.
I am writing several key value pairs like this.
Everytime I write a KEY=VALUE it should be in a new line.
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Well the square most likely is just a non-printable character. If you are on windows the line.separator is \r\n (0x13 and 0x10) some file editors show the \n as a "square" as the only expect a \r its just how you interpret the file.. you can't atually do anythign about it as it isn't "wrong" if you skip the \n some programs might not see it as a newline. If you add it some may display a square.. Its the great gift of different OS's using different line separators..
HTH
Lima

Help with Could not load file or assembly 'msshrtmi' or one of its dependencies. An attempt was made to load a program with an incorrect format.

This was all working yesterday, but this morning, I cannot run in the dev fabric, or even setting the website project as a startup project directly, I get the following error:
Could not load file or assembly 'msshrtmi' or one of its dependencies. An attempt was made to load a program with an incorrect format.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.BadImageFormatException: Could not load file or assembly 'msshrtmi' or one of its dependencies. An attempt was made to load a program with an incorrect format.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Assembly Load Trace: The following information can be helpful to determine why the assembly 'msshrtmi' could not be loaded.
=== Pre-bind state information ===
LOG: User = Andrew-VAIO\Andrew
LOG: DisplayName = msshrtmi
(Partial)
WRN: Partial binding information was supplied for an assembly:
WRN: Assembly Name: msshrtmi | Domain ID: 3
WRN: A partial bind occurs when only part of the assembly display name is provided.
WRN: This might result in the binder loading an incorrect assembly.
WRN: It is recommended to provide a fully specified textual identity for the assembly,
WRN: that consists of the simple name, version, culture, and public key token.
WRN: See whitepaper http://go.microsoft.com/fwlink/?LinkId=109270 for more information and common solutions to this issue.
LOG: Appbase = file:///C:/Users/Andrew/Desktop/Beko2011Azure/Website/
LOG: Initial PrivatePath = C:\Users\Andrew\Desktop\Beko2011Azure\Website\bin
Calling assembly : (Unknown).
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: C:\Users\Andrew\Desktop\Beko2011Azure\Website\web.config
LOG: Using host configuration file:
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/Temporary ASP.NET Files/root/cb955b02/eef106e2/msshrtmi.DLL.
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/Temporary ASP.NET Files/root/cb955b02/eef106e2/msshrtmi/msshrtmi.DLL.
LOG: Attempting download of new URL file:///C:/Users/Andrew/Desktop/Beko2011Azure/Website/bin/msshrtmi.DLL.
ERR: Failed to complete setup of assembly (hr = 0x8007000b). Probing terminated.
Stack Trace:
[BadImageFormatException: Could not load file or assembly 'msshrtmi' or one of its dependencies. An attempt was made to load a program with an incorrect format.]
System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +0
System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +39
System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection, Boolean suppressSecurityChecks) +132
System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +144
System.Reflection.Assembly.Load(String assemblyString) +28
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +46
[ConfigurationErrorsException: Could not load file or assembly 'msshrtmi' or one of its dependencies. An attempt was made to load a program with an incorrect format.]
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +618
System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory() +209
System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai) +130
System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig) +178
System.Web.Compilation.BuildManager.GetPreStartInitMethodsFromReferencedAssemblies() +94
System.Web.Compilation.BuildManager.CallPreStartInitMethods() +332
System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException) +677
[HttpException (0x80004005): Could not load file or assembly 'msshrtmi' or one of its dependencies. An attempt was made to load a program with an incorrect format.]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9079228
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +97
System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr) +258
Note that the dev machine is x64 Win7.
I have not tried deploying this to staging since the issue started as I'm a bit nervous of touching the staging/live environment until this is solved.
Removing the PlatformTarget element from the project file has no effect
Removing the msshrtmi.dll file from the bin directory of the website project ends up with
'Could not load file or assembly 'Microsoft.WindowsFabric.Common, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified'
I have used Git to revert to the last working build to no effect (But I don't have the obj/bin folders in GIT), but it has atleast reset the project files etc.
If I return msshrtmi.dll to the bin folder and switch the model and website projects to x64 there is no change
If I switch both to x86 then I get an error Could not load file or assembly 'BekoModel2011' or one of its dependencies. An attempt was made to load a program with an incorrect format.
which is the model project - presumably because to run on my x64 machine I need the 64bit version?
I really need to be able to debug and then publish some changes ASAP.
Andrew

Hi,
Is it true that you're using IIS to host the application? Could you check whether the process is x64 or x86 one via task manager or config in IIS manager?
http://blogs.msdn.com/b/rakkimk/archive/2007/11/03/iis7-running-32-bit-and-64-bit-asp-net-versions-at-the-same-time-on-different-worker-processes.aspx
Allen Chen [MSFT]
MSDN Community Support | Feedback to us
Get or Request Code Sample from Microsoft
Please remember to mark the replies as answers if they help and unmark them if they provide no help.

Help with displaying my xml file in my jtext area

Hi i am trying to read the data from my xml file and display it once the user clicks on the list all button.
below is the source code for my program can someone please tell me some code to this.
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import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
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import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.beans.XMLDecoder;
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//import tractor.TextInputPrompt;
import tractor.Tractor;
* This code was edited or generated using CloudGarden's Jigloo
* SWT/Swing GUI Builder, which is free for non-commercial
* use. If Jigloo isbeing used commercially (ie, by a corporation,
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* Please visit www.cloudgarden.com for details.
* Use of Jigloo implies acceptance of these licensing terms.
* A COMMERCIAL LICENSE HAS NOT BEEN PURCHASED FOR
* THIS MACHINE, SO JIGLOO OR THIS CODE CANNOT BE USED
* LEGALLY FOR ANY CORPORATE OR COMMERCIAL PURPOSE.
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     private JButton exhibittractor;
     private JButton deletetractor;
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          try {
               BorderLayout thisLayout = new BorderLayout();
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                         listallexbited.setText("List All Tractors On Exhibition ");
                         listallexbited.setPreferredSize(new java.awt.Dimension(157, 57));
                         listallexbited.setBackground(new java.awt.Color(0,255,255));
                         listallexbited.setForeground(new java.awt.Color(64,0,0));
                         listallexbited.addActionListener(new ActionListener() {
                              public void actionPerformed(ActionEvent evt) {
                                   outputscreen.repaint();
                                   String XMLFile = "C:tractor.xml";
                              // Print contents of XML file
                              try {
                              String s;
                              BufferedReader in = new BufferedReader( new FileReader(XMLFile)
                              outputscreen.setText("File successfully opened");
                              try {
                              while ( (s=in.readLine()) !=null)
                              outputscreen.append(s);
                              catch(Exception e) {
                                   outputscreen.append("Error reading line: " + e.getMessage());
                              outputscreen.append("End of Document");
                              catch(FileNotFoundException e) {
                                   outputscreen.append("Error in opening file: " + e.getMessage());
                         addtractor = new JButton();
                         MenuButtons.add(getAddtractor());
                         addtractor.setText("Add Tractor ");
                         addtractor.setBackground(new java.awt.Color(0,255,255));
                         addtractor.setForeground(new java.awt.Color(64,0,0));
                         addtractor.addActionListener(new ActionListener() {
                              public void actionPerformed(ActionEvent evt) {
                                   String manufacturer =JOptionPane.showInputDialog(getComponent(0), "Enter Manufacturer of Tractor");
                                   String shp = (JOptionPane.showInputDialog(getComponent(0), "Enter Horse Power of Tractor"));
                                   int hp =Integer.parseInt(shp);
                                   int sisRare =Integer.parseInt(JOptionPane.showInputDialog(getComponent(0), "Enter If the Tractor is rare (1=Yes/2=No)"));
                                   boolean isRare;
                                   if (sisRare== 1) {
                                   isRare =true;
                                   }else
                                        isRare =false;
                                   String yom= JOptionPane.showInputDialog(getComponent(0), "Enter Year of Manufacture");
                                   int yearOfManufacture =Integer.parseInt(yom);
                                   String yis =JOptionPane.showInputDialog(getComponent(0), "Enter Number of years the Tractor has been in service");
                                   int yearsInService =Integer.parseInt(yis);
                                   String svalue = JOptionPane.showInputDialog(getComponent(0), "Enter Tractor's Value (?Pounds)");
                                   double value = Double.parseDouble(svalue);
                                   String lastWorkPlace =JOptionPane.showInputDialog(getComponent(0), "Enter Last Workplace");
                                        if(NewSwingApp.addTractor(new Tractor(manufacturer, hp, isRare, yearOfManufacture, yearsInService, value, lastWorkPlace, false)))
                                   JOptionPane.showMessageDialog((getComponent(0)), "Tractor Added");
                                   else
                                        JOptionPane.showMessageDialog(getComponent(0), "Could not Add Tractor");
                         deletetractor = new JButton();
                         MenuButtons.add(getDeletetractor());
                         deletetractor.setText("Delete Tractor ");
                         deletetractor.setBackground(new java.awt.Color(0,255,255));
                         deletetractor.setForeground(new java.awt.Color(64,0,0));
                         deletetractor.addActionListener(new ActionListener() {
                              public void actionPerformed(ActionEvent evt) {
                                   System.out.println("deletetractor.actionPerformed, event="+evt);
                                   JOptionPane.showInputDialog(getComponent(0), "Enter Tractor ID");
                         exhibittractor = new JButton();
                         MenuButtons.add(getExhibittractor());
                         exhibittractor.setText("Exhibit Tractor");
                         exhibittractor.setBackground(new java.awt.Color(0,255,255));
                         exhibittractor.setForeground(new java.awt.Color(0,0,0));
                         exhibittractor.addActionListener(new ActionListener() {
                              public void actionPerformed(ActionEvent evt) {
                                   System.out.println("exhibittractor.actionPerformed, event="+evt);
                                   JOptionPane.showInputDialog(getComponent(0), "Enter Tractor I.D");
                         archivetractor = new JButton();
                         MenuButtons.add(getArchivetractor());
                         archivetractor.setText("Archive Tractor");
                         archivetractor.setBackground(new java.awt.Color(0,255,255));
                         archivetractor.setForeground(new java.awt.Color(0,0,0));
                         archivetractor.addActionListener(new ActionListener() {
                              public void actionPerformed(ActionEvent evt) {
                                   System.out.println("archivetractor.actionPerformed, event="+evt);
                                   JOptionPane.showInputDialog(getComponent(0), "Enter Tractor I.D");
                         searchmanufacturer = new JButton();
                         MenuButtons.add(searchmanufacturer);
                         searchmanufacturer.setText("Search Manufacturer");
                         searchmanufacturer.setPreferredSize(new java.awt.Dimension(159, 21));
                         searchmanufacturer.setBackground(new java.awt.Color(0,255,255));
                         searchmanufacturer.setForeground(new java.awt.Color(64,0,0));
                         searchmanufacturer.addActionListener(new ActionListener() {
                              public void actionPerformed(ActionEvent evt) {
                                   System.out.println("searchmanufacturer.actionPerformed, event="+evt);
                                   JOptionPane.showInputDialog(getComponent(0), "Enter Manufacturer Name");
                    outputscreen = new JTextArea();
                    getContentPane().add(outputscreen, BorderLayout.CENTER);
                    outputscreen
                              .setText("");
                    outputscreen.setBorder(BorderFactory.createTitledBorder(""));
                    outputscreen.setWrapStyleWord(true);
                    outputscreen.setEditable(false);
                    outputscreen.setEnabled(true);
                    outputscreen.setBackground(new java.awt.Color(255, 255, 255));
                    outputscreen.setForeground(new java.awt.Color(64, 0, 0));
                    companyname = new JLabel();
                    getContentPane().add(companyname, BorderLayout.NORTH);
                    companyname.setText(" Wolvesville Tractor Museum");
                    companyname.setPreferredSize(new java.awt.Dimension(609, 85));
                    companyname.setBackground(new java.awt.Color(255,255,0));
                    companyname.setFont(new java.awt.Font("Arial",1,28));
                    companyname.setForeground(new java.awt.Color(0,0,0));
                    companyname.setBorder(BorderFactory.createTitledBorder(""));
                    companyname.setOpaque(true);
               this.setSize(750, 750);
          } catch (Exception e) {
               e.printStackTrace();
     protected static boolean addTractor(Tractor tractor) {
               if (tractor.getManufacturer()==null) return false; else
               if (tractor.getHp()<50||tractor.getHp()>1100) return false; else
               if (tractor.getIsRare()==false) return false; else
               if (tractor.getYearsInService()<1||tractor.getYearsInService()>200) return false; else
               if (tractor.getYearOfManufacture()<1800||tractor.getYearOfManufacture()>2008) return false; else
               if (tractor.getValue()<100||tractor.getValue()>1500) return false; else
               if (tractor.getLastWorkPlace()==null) return false; else
          return true;
     public JPanel getMenuButtons() {
          return MenuButtons;
     public JButton getListall() {
          return listall;
     public JLabel getCompanyname() {
          return companyname;
     public JButton getExitsystem() {
          return jButton3;
     public JButton getSearchmanufacturer() {
          return searchmanufacturer;
     public JButton getListallexbited() {
          return listallexbited;
     public JButton getAddtractor() {
          return addtractor;
     public JButton getDeletetractor() {
          return deletetractor;
     public JButton getExhibittractor() {
          return exhibittractor;
     public JButton getArchivetractor() {
          return archivetractor;
     public JTextArea getOutputscreenx() {
          return outputscreen;
public void savetractors () {
     try {
          XMLEncoder encoder = new XMLEncoder(new FileOutputStream("tractor.xml"));
          encoder.writeObject(tractors);
          encoder.close();
     } catch (FileNotFoundException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
public void loadtractors () {
try {
          XMLDecoder decoder = new XMLDecoder(new FileInputStream("tractor.xml"));
          tractors = (Tractor[]) decoder.readObject();
          decoder.close();
          for (int i=0; i<tractors.length;i++) {
               if (tractors!=null)numberOfTractors =i;
          numberOfTractors++;
     } catch (FileNotFoundException e) {
          // TODO Auto-generated catch block
          tractors=new Tractor[25];
          numberOfTractors=0;

here's an example:
http://jdj.sys-con.com/read/37550.htm
you need to have a class Tractor with all those properties and then use readObject.Somehow you need to tell the Encoder/Decoder what Tractor means..
hope this helps!!

Help with writing, reading a file...

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