Very new to Java, trying to make a jar file run on WM6

Ok so i downloaded this java progam that is supposed to work on "java-enabled" phones. So i have windows mobile 6, which is able to run java but i think its limited to the browser. when i try to run it on a virtual java machine i recieve the following error.
java.lang.Exception: No Main-Class attribute in \My Documents\TrafficPilot.jar
at java.lang.VMMainThread$1.run(VMMainThread.java)
at java.lang.VMThread.run(VMThread.java:120)
JVM exit
what is needed to make this work? or is it even possible?

Hi, welcome to the Sun Java forums.
Pester the person who gave you the JAR, s/he did something wrong.
Pass this information on to them:
Add a MANIFEST.MF file in the JAR's META-INF directory (all names case-sensitive) and put this line in it, with two Enters after it:
Main-Class: mypackage.MainClassName
Though if the JAR contains an applet (which would explain why it only works in a browser), it might not have a main class.

Similar Messages

Very new to java please help

i'm very new to java and i'm getting an error in my application. i took 4 applications that compiled and worked separatly and i tried to combine them into one application. i'm getting the error: unreported exception java.io.IOException; must be caught or declared to be thrown, in lines 73,78,83,88,120,146,149,152,155 in the and it points at the keyboard.readLine() but everything i've tried just gives me more errors. please help anything and everything will be greatly appreciated. here it is, sorry about format i dunno how to straighten it in here:
// ^ ^
//               (0)(0) A Happy Piggy Application
// Problems: 2.6,2.8,2.9,2.12 (oo)
// An application finds the total number of hours, minutes, & seconds, finds the distance
// between two points, finds the volume and surface area of a sphere, and adds up the change
// in a jar. First, the total hours, minutes, and seconds problem.
import java.io.*;
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class twoptsix
     static BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in));
     static PrintWriter screen = new PrintWriter(System.out, true);
     public static void main (String[] args) throws IOException
          double hoursa, minutesa, secondsa;
          String hours;
          System.out.print ("Please enter a number of hours: ");
hours = keyboard.readLine();
hoursa = Double.parseDouble(hours); //asks programmer friendly user to enter hours
String minutes;
System.out.print ("Please enter a number of minutes: ");
minutes=keyboard.readLine();
minutesa = Double.parseDouble(minutes); //asks programmer friendly user to enter minutes
String seconds;
System.out.print ("Pretty please enter a number of seconds: ");
seconds = keyboard.readLine();
secondsa = Double.parseDouble(seconds); //asks programmer friendly user to enter seconds
double allseconds;
allseconds = (hoursa * 3600) + (minutesa * 60) + secondsa; //adds up all the seconds of the time entered
System.out.println ("You have: " + hours + " hours..."); //displays hours
System.out.println ("" + minutes + " minutes..."); //displays minutes
System.out.println ("and " + seconds + " seconds..."); //displays seconds
          System.out.println ("to get whatever you need to done!"); //witty attempt at humor
System.out.println ("The total amount of seconds is: " + allseconds + " seconds."); //displays total seconds
// An application that finds the distance between two points when the points
// are given by the user.
          double x1, x2, y1, y2, total, distance;
          String xa;
          System.out.print ("Please enter the 'x' coordinate of first point: ");
          xa = keyboard.readLine();
          x1 = Double.parseDouble(xa); //asks programmer friendly user to enter first x value
          String ya;
          System.out.print ("...also need the 'y' coordinate of first point: ");
          ya = keyboard.readLine();
          y1= Double.parseDouble(ya); //asks programmer friendly user to enter first y value
          String xb;
          System.out.print ("...and the 'x' coordinate of the second point: ");
          xb = keyboard.readLine();
          x2 = Double.parseDouble(xb); //asks programmer friendly user to enter second x value
          String yb;
          System.out.print ("...don't forget the 'y' coordinate of the second point: ");
          yb = keyboard.readLine();
          y2 = Double.parseDouble(yb); //asks programmer friendly user to enter second y value
          total = Math.pow(x2 - x1, 2.0) + Math.pow(y2 - y1, 2.0); //squares the differences of values
          distance = Math.sqrt(total); //finds the square root of the sum of the differences of the values
          System.out.print ("E=mc^2...oh and,");
          System.out.print ("the distance between point (" + xa +"," + ya +") and point("+
          xb + "," + yb + ") is : " + distance);
// An application that takes the radius of a sphere and finds and prints
// the spheres volume and surface area.
          double radius,volume,area;
          String rad;
          System.out.print("Please enter the radius of a sphere: ");
          rad = keyboard.readLine();
          radius = Double.parseDouble(rad); //asks programmer friendly user to enter the radius of a sphere
DecimalFormat fmt = new DecimalFormat ("0.####");
          volume = ((4 * Math.PI * Math.pow(radius,3.0)) / 3) ;
          System.out.println (" The sphere has a volume of:" + fmt.format(volume)); //finds and displays volume
          area = ( 4 * Math.PI * Math.pow(radius, 2.0)) ;
          System.out.print (" The Surface Area of the sphere is: " + fmt.format(area)); //finds and displays surface area
// An application that finds the total, in dollars and cents, of a number of quarters,
// nickels, dimes, and pennies in your piggy bank.
          int pennies, nickels, dimes, quarters;
          double money1;
          screen.println("Empty your piggy bank and count the change, how many quarters ya have?: ");
          int q = (new Integer(keyboard.readLine())).intValue();//asks programmer friendly user to enter a number of quarters
          screen.println("How many dimes?: ");
          int d = (new Integer(keyboard.readLine())).intValue();//asks programmer friendly user to enter a number of dimes
          screen.println("How many nickels?: ");
          int n = (new Integer(keyboard.readLine())).intValue();//asks programmer friendly user to enter a number of nickels
          screen.println("How many pennies?: ");
          int p = (new Integer(keyboard.readLine())).intValue();//asks programmer friendly user to enter a number of pennies
          NumberFormat money = NumberFormat.getCurrencyInstance();
          money1 = (.25 * q) + (.1 * d) + (.05 * n) + (.01 * p);
          screen.println("You're rich! Total, you've got: " + money.format(money1));//finds and displays total money

Ok here is the working code as one long function:
// ^ ^
// (0)(0) A Happy Piggy Application
// Problems: 2.6,2.8,2.9,2.12 (oo)
// An application finds the total number of hours, minutes, & seconds, finds the distance
// between two points, finds the volume and surface area of a sphere, and adds up the change
// in a jar. First, the total hours, minutes, and seconds problem.
import java.io.*;
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class twoptsix
    static BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in));
    static PrintWriter screen = new PrintWriter(System.out, true);
    public static void main (String[] args) throws IOException
double hoursa, minutesa, secondsa;
String hours;
System.out.print ("Please enter a number of hours: ");
hours = keyboard.readLine();
hoursa = Double.parseDouble(hours); //asks programmer friendly user to enter hours
String minutes;
System.out.print ("Please enter a number of minutes: ");
minutes=keyboard.readLine();
minutesa = Double.parseDouble(minutes); //asks programmer friendly user to enter minutes
String seconds;
System.out.print ("Pretty please enter a number of seconds: ");
seconds = keyboard.readLine();
secondsa = Double.parseDouble(seconds); //asks programmer friendly user to enter seconds
double allseconds;
allseconds = (hoursa * 3600) + (minutesa * 60) + secondsa; //adds up all the seconds of the time entered
System.out.println ("You have: " + hours + " hours..."); //displays hours
System.out.println ("" + minutes + " minutes..."); //displays minutes
System.out.println ("and " + seconds + " seconds..."); //displays seconds
System.out.println ("to get whatever you need to done!"); //witty attempt at humor
System.out.println ("The total amount of seconds is: " + allseconds + " seconds."); //displays total seconds
// } <----- MAIN FUNCTION USED TO END HERE!!!
//but we want to keep going so remove the bracket!
// An application that finds the distance between two points when the points
// are given by the user.
// { <-- other function used to start here, but now it continues
double x1, x2, y1, y2, total, distance;
String xa;
System.out.print ("Please enter the 'x' coordinate of first point: ");
xa = keyboard.readLine();
x1 = Double.parseDouble(xa); //asks programmer friendly user to enter first x value
String ya;
System.out.print ("...also need the 'y' coordinate of first point: ");
ya = keyboard.readLine();
y1= Double.parseDouble(ya); //asks programmer friendly user to enter first y value
String xb;
System.out.print ("...and the 'x' coordinate of the second point: ");
xb = keyboard.readLine();
x2 = Double.parseDouble(xb); //asks programmer friendly user to enter second x value
String yb;
System.out.print ("...don't forget the 'y' coordinate of the second point: ");
yb = keyboard.readLine();
y2 = Double.parseDouble(yb); //asks programmer friendly user to enter second y value
total = Math.pow(x2 - x1, 2.0) + Math.pow(y2 - y1, 2.0); //squares the differences of values
distance = Math.sqrt(total); //finds the square root of the sum of the differences of the values
System.out.print ("E=mc^2...oh and,");
System.out.print ("the distance between point (" + xa +"," + ya +") and point("+
     xb + "," + yb + ") is : " + distance);
//second function used to end here...
//} <--- COMMENT OUT BRACKET SO WE CONTINUE
// An application that takes the radius of a sphere and finds and prints
// the spheres volume and surface area.
//{ <--- ANOTHER ONE TO COMMENT OUT
double radius,volume,area;
String rad;
System.out.print("Please enter the radius of a sphere: ");
rad = keyboard.readLine();
radius = Double.parseDouble(rad); //asks programmer friendly user to enter the radius of a sphere
DecimalFormat fmt = new DecimalFormat ("0.####");
volume = ((4 * Math.PI * Math.pow(radius,3.0)) / 3) ;
System.out.println (" The sphere has a volume of:" + fmt.format(volume)); //finds and displays volume
area = ( 4 * Math.PI * Math.pow(radius, 2.0)) ;
System.out.print (" The Surface Area of the sphere is: " + fmt.format(area)); //finds and displays surface area
// } <----- COMMENTED OUT FOR THE SAME REASON
// An application that finds the total, in dollars and cents, of a number of quarters,
// nickels, dimes, and pennies in your piggy bank.
//{ <----AND ANOTHER
int pennies, nickels, dimes, quarters;
double money1;
screen.println("Empty your piggy bank and count the change, how many quarters ya have?: ");
int q = (new Integer(keyboard.readLine())).intValue();//asks programmer friendly user to enter a number of quarters
screen.println("How many dimes?: ");
int d = (new Integer(keyboard.readLine())).intValue();//asks programmer friendly user to enter a number of dimes
screen.println("How many nickels?: ");
int n = (new Integer(keyboard.readLine())).intValue();//asks programmer friendly user to enter a number of nickels
screen.println("How many pennies?: ");
int p = (new Integer(keyboard.readLine())).intValue();//asks programmer friendly user to enter a number of pennies
NumberFormat money = NumberFormat.getCurrencyInstance();
money1 = (.25 * q) + (.1 * d) + (.05 * n) + (.01 * p);
screen.println("You're rich! Total, you've got: " + money.format(money1));//finds and displays total money
}P.S. To make the code formatted better put [ code ] before and [ /code ] after. It's not perfect, but a little better...

Very New to Jave, need to do totals/subtotals

Hi, (I hope this is the right place)
I'm VERY new to Java (I mainly do wourk with php interfaces for MyAQL databases).
Up until now, there hasn't been anything I couldn't do with PHP that I needed to...
My boss recently requested subtotals/totals at various points on an input sheet. The sheet inputs numbers of people, so I'm not worried about rounding (The php already takes care of people trying to input parts of people....) or tax.
It's a rather large form (~144 lines) and the math is already in place to do the subtotaling (among other things) before entering the information into the database.
How would I go about writing script that would display sub totals, and recalculate them every time one of the boxes value's is modified?
Is this something javascript is designed to do? Is there a better language out there for this task?
I've found sites out there that have canned subtotal/total scripts, but I don't want something pre-made unless it comes with a detailed explaination of what everything does; if I'm going to maintain it, I have to understand it.
Thanks

Is this a web form? e.g. a html form with input fields?
You can add onchange or onblur events to your input fields to detect changes. Then you can use javascript to retrieve the values from the form and do the calculation.
-S

Very New To Java

Hi, I'm very new to java - 2nd day. Trying to move from Visual FoxPro.
In testing statements to learn java, I can't seem to get java.util.Scanner.nextInt or nextDouble ... etc. to wait for a keyborad input. Is there something I have to configure before utilizing ...Scanner.nextWhatever?
I'm using the latest java (just downloaded 2 day ago) and TextPad as my editor.
Thanks you.

Hi Petes1234:
Thanks for you quick response!!!!
The following is the code very simple ... still my "Hello World!" phase of learning.
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}The above code complies fine. But when I try to run it, it errors out with the following error:
Enter an integer: Exception in thread "main" java.util.NoSuchElementException
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How to make a jar file from a java file?

how to make a jar file from a java file, is there any one tht can help me thank you;

You can study this.
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Hi !
Is there a way to make a jar file availlable to all web application included in a .ear file. I know that i can manually copy the jar under (OC4J_HOME)/j2ee/home/lib , but can i create a package that have those web application ( lets say 4 ) and also the common jar file, deploy the that .ear file and make my jar file automatically availlable for all the deployed web application ? or is there a special command that i can use to copy that jar to the (OC4J_HOME)/j2ee/home/lib while deploying the .ear file ?
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thanx for your audience...

Open the file %J2EE_HOME%/applcation-deployments/your-app/orion-application.xml. Add a tag like the one below:
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Adding all dependent classes of an applet to make a jar file

Hi everyone,
I have this problem which I was not able to find a solution for, So I truly appreciate any feedback on this.
I have a project on eclipse which is basically an applet.
This applet is using some classes in some jars that I have imported as libraries for this project.
Everything works on eclipse with no problem. However I need to make a jar file of the applet and required classes to use it in an html page.
Now that's the part I have been facing difficulties, cuz I have to include all the classes that the applet is using from other jar
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On the other side if I include the whole jars then my applet goes over 100 meg and would be useless.
I am going to give an example of the problem I have in hope of making it a bit clear.
I have a applet, which uses some classes from some jars. i.e., class A. but class A itself need class B and etc.
Now how can I find all these dependencies since I have to include them along the applet in the jar file I am going to make.
Once again I appreciate any feedback and sorry that is a long question.

Fractalz wrote:
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http://java.sun.com/javase/6/docs/technotes/guides/jar/jar.html#Manifest-Overview

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hello,
i've been working with java and java servlet for a while, but i've no clue about jar files. my question is, how do i make a jar file? is a jar file a compressed version of multiple class files or what? thanks for any advice.

OK, here's a link to learning about JAR files - this should help you master all you'd need to know to work with jars.
http://developer.java.sun.com/developer/Books/javaprogramming/JAR/basics/
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Thanks for the reply pbrockway2. But i think, i was not able to convey my problem properly.
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Trying to make a php file work with my email form

Hello,
Going slightly mad trying to link my php file with my html and actually getting it to work.
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Address: $address <br>
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Telephone (mobile): $telephone2 <br>
Email: $email <br>
Childs Name: $name2 <br>
Start Age: $age <br>
Childs Date of Birth: $dob <br>
Preferred form of communication: $comms <br>
Message: $message <br>
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<html>
<head>
<title>Xxx</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css">

</style>
</head>
<div>
<div align="left">Thank you for your message, Your email will be answered very soon!</div>
</div>
</body>
</html>
EOD;
echo "$theResults";
?>

Line 37 is this:
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It should be this:
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Also the header for the From: is this:$headers = "From: $email\r\n"; but I don't see the variable defined for $email
Also you should know about email injection. Someone could inject your headers and add additional BCC: addresses to send emails to many undisclosed recipients through your mail script. You'd be using your script to turn your server into a host for spam! Sanitize your fields to prevent injection attacks! Security should be the firt priority followed by functionality. If it's unsecure it shouldn't function

Is it possible to read "rtx" files in JAVA.. and make a "xls" files.. !!

Hello frnds..
I dont have any idea.. how to read rtx files.. in JAVA.. ??
I have some data in rtx files.. which i want to read it.. and save in xls files.. !!
Please someone help.. am new to java.. searched a lot.. abt that .. but didnt find.. anything.. !!
gervini

I'm not being dismissive but I think your question comes down to "is there already a package/library to do this".
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Trying to make a text file of ITunes library

I'm trying to make a list of my itunes library in any type of text file (word, notebook, notepad,etc). My ex sent me an old library this way just so that I could see what I already had at his place so I wouldn't duplicate things. How do I do this??

In iTunes, use View > Options to show the fields you want to show. Then Edit > Select All, then Edit Copy.
Open Word and use *Paste Special > Unformatted Text.*
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Trying to make a transparent file or layer in CS5

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1) I try to make a transparent file, I set the backgroud contents to be transparent:
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I included my screenshots here but when I submit the post, all screenshots are gone. (Must be the Halloween Day)
Please help!
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I made it work by save the screenshots in JPEG file, then insert into the post.
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Deploying Java Desktop App using executable JAR files

Hi there.
Today I am very optimistic about java. I am a beginner, and I had tried (in my few free time) to understand how to deploy java desktop apps.
I am using the lattest NetBeans IDE to do the programming and it is very very fast and optimized.
Going to the point, I tried some time ago to deploy an application (made with this IDE) using JAR files, but even though the application run well on my IDE, when I packed it, it rised an error saying that
java.lang.NoClassDefFoundError: org/netbeans/lib/awtextra/AbsoluteLayout
I was using an absolute layout on my JFrame forms and this AbsoluteLayout is provided by netbeans and not by the normal SDK.
I then looked for the absolute layout class and found a jar file in the following path:
C:\netbeans\modules\ext\AbsoluteLayout.jar
So I mounted the Jar file in my File Systems and then added the contents of the file to myApp.Jar file.
I used the automated Jar Recipe Packaging feature of netbeans, that is why I needed to mount the AbsoluteLayout.jar file into my file systems.
Now it runs fine by just right clicking the MyApp.jar file from Windows Explorer.
In a next reply to this topic I will include some sample code so that anybody requiring to do such implementation can take this for help.
Regards!
JN

Well,
I will take some time here to show the basic source code and procedure to create a desktop application, pack it up in a Jar file for deployment, add other classes or jars to the deployment jar file and finally open the jar file as an executable. This applies for either windows and linux environments.
Take in count i am using Netbeans IDE 3.x (3.5)
First I open the IDE and create a new project called MyDesktopApp. This is done by going to the menu Project / Project Manager. Then click on the New button and specify the project name and click on OK.
At this point, the Filesystems tab in the project explorer is empty. So I mount a directory to store myDesktopApp in it. I selected c:\MyDesktopApp but you can select any name you want.
To mount the directory you follow these steps:
1. Right-click on File Systems
2. From the contextual menu select Mount > Local Directory
3. In the filechooser window, you just browse it and SELECT the directory to mount. Be aware that you can even create the directory on this window. Do not enter (double-click) into the directory you want to mount, just select it and click on finish...
4.Then the directory entry appears under the filesystems node of the project explorer.
Now you have to create your application. You can either create a package (special configured and tracked directory) or you can create the clases directly inside the directory. For tidy project, I will create the package.
To create the package follow these instructions:
1. Right-click on the mounted directory and from the contextual menu select New > Java Package
2. In the New Wizard - Java Package window, type the package name and click on finish. I use the "MyDesktopApp" as package name.
OK. Now the package is created under the mounted directory. Now we have to create the Main Class. In this case I will use a JFRAME as the main class but you can create any class you want.
To create the JFRAME as main class follow these steps:
1. Right click on the java package you just created and select New>JFRAME from the contextual menu. If you do not see the JFRAME option on the NEW sub menu you will have to select the All Templates option. I explain the All Templates option now on, it will be easier to use the JFRAME if available. Once you use JFRAME with the all templates then the JFRAME will show up in further NEW usage.
2. So finally we used the All Templates, and you select the Java GUI Forms > JFRAME form option and click on NEXT.
3. Give it a name. (I used MyDesktopAppFrm) and click on finish. Be aware you can set advanced options by clicking on next. But for the purposes of this topic we will use default options so click on FINISH
4. A new JFRAME form appears inside your package. Right click on the form and select Set layout > Absolute Layout.
5. Add some controls and code. I added a label and a button. And coded the ActionPerformed event of the button to say hello! on the label. this is up to you. The code just looks as follows:
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// Add your handling code here:
jLabel1.setText("Hello folks!");
6. Compile and execute the form.
Let's say this is our Desktop Application. Now We will pack it in a Jar in two steps...
A. Create a JAR file (Recipe)
1. Right-click on your package and select New > All Tempaltes (Long Route) You can also select New > JAR Recipe if available.
2. On the New Wizard Window, choose the JAR ARchives > JAR Recipe template and click on NEXT
3. I used MyDesktopApp as the file name and Defaults and then click on Next.
4. Specify the JAR Contents. Select the Package (not the mounted folder) from the mounted file system and click on add and then click on NEXT twice...
5. On the JAR Manifest window, click on GENERATE
6. Edit the manifest in the window to add the following code:
Main-Class: MyDesktopApp.MyDesktopAppFrm
7. Ensure the Main-Class definition is the same as your java package and JFRAME name. Click on FINISH
8. At this point we have a jar file in your project directory but this file wont run because it is missing some Netbeans clases that we will add in the next set of steps... Just to check, compile the file (right click on the JAR file and compile) and try to execute. It must compile but must not execute.(well if it executes you are done. It may execute if you did not set the lay out of the form as AbsoluteLayout)
B. Add the AbsoluteLayOut to the JAR
1. Right click on File Systems and select Mount > Archive Files
2. Look for your netbeans installation folder and select the following file:
.../netbeans/modules/ext/AbsoluteLayout.jar
3. Click on finish
4. Now the JAR File is mounted in the file systems.
5. Right-click on your MyDesktopApp.JAR file and select properties.
6. Look for the contents property click once on it and then on its elipsis button [...]
7. From the FileSystems box in the Contents window, select the AbsoluteLayOut file and click on Add
8. Then the system asks you if you are sure. Of course you are so click OK. (If not sure, just read the message text and click OK...:-))
9. Click on OK
10. Compile your JAR Recipe (right click on it and Compile)
11. Now you must be able to run the file by right clicking it and EXECUTE.
12. Also you must be able to run the file by double clicking the file from a Windows Explorer. You may receive a message asking to select the program to run the file with. You must browse and select the Javaw.exe file in the bin directory of your Java RUn Time installation. This is typically located at C:\j2sdk1.4.0_01\jre\bin or something like that. Use the File-Search feature of window to locate the JAVAW.exe file if needed.
I hope this long explanation helps somebody to deploy Java Desktop applications. Please reply the message if it helps you just to know it was useful.
Thanks for your time....
JN

Problem trying to cataloge a jar file OBPM 10.3.1.0

Hi,
I´m having problems when i cataloge a jar file, in OBPM suite 10.3.1.0, it is an itext jar file. I´ve been trying to cataloge older and newer versions of the Itext jar file but there´s no difference in the outcome.
I create the external resource, but when i try to cataloge the package it doesn´t work
The message it returns is:
[Error] Excepción de introspección: Internal Error: java.lang.VerifyError: (class: com/lowagie/text/RectangleReadOnly, method: <init> signature: (Lcom/lowagie/text/Rectangle;)V) Bad access to protected data..
is there anything i can do to solve this problem?..
Thanks for your time
Alfredo Butrón
Alkimia Consultores

Hi Dan,
I´ve done what you told me, i buid a helper class to invoke the iText classes ,and i just cataloge the helper class keeping all the jar files only in the external resource
When i run my class out of OBPM it works fine, but when i try to invoke my class from OBPM with the same jar classes i use in a external way i get the following message:
     at fuego.component.ExecutionThread.work(ExecutionThread.java:839)
     at fuego.component.ExecutionThread.run(ExecutionThread.java:408)
Caused by: java.lang.NoSuchMethodError: com.lowagie.text.pdf.PdfWriter.setRgbTransparencyBlending(Z)V
     at net.sf.jasperreports.engine.export.JRPdfExporter.exportReportToStream(JRPdfExporter.java:482)
     at net.sf.jasperreports.engine.export.JRPdfExporter.exportReport(JRPdfExporter.java:381)
i change the version of iText.jar many times and i get the same message..
thanks in advance
ALfredo

Very new to Java, trying to make a jar file run on WM6

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