Jar file is not executing

hi all,
i was creating a jar excutable, when i was trying to execute it by double clicking on it(its placed in the desktop), open with dialog box is coming. could u plz help me out??
here what i've done.. in the manifest file i've entered
Manifest-Version: 1.0
Main-Class: Class2Jarand to create the jar file i've given the command
jar cmf manifest.mf max.jar Class2Jar.classthankx & regards,
max

open with dialog box is comingLooks like a broken file association. Try re-installing the Java runtime to have Jars associated to it again.

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Russ_Bjork wrote:
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Hello everyone!
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Hi!
Thanks for your reply. Here's what's happening so far:
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Service stack update 2871777 to enable installation of RDP Connection Broker on 2012 domain controller - downloaded file will not execute.

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As to the other problem maybe this one helps.
http://social.technet.microsoft.com/Forums/windowsserver/en-US/bbf47aa2-8ae5-4f22-9827-afee5a11417a/install-remote-desktop-services-failed-on-windows-2012-server?forum=winserverTS
Regards, Dave Patrick ....
Microsoft Certified Professional
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Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

Selected file is not executable when loading core file

Hello all
im using sunstudio 12 on sun4u sparc using compiler version Sun C++ 5.9 SunOS_sparc Patch 124863-04 2008/04/16
when i try to load core dump that is created from one of the executables with sunstudio 12 im getting this message
"The Select file is not executable "
and when i open the core file with command like dbx every thing is working fine

here is all the output:
Running "/opt/SUNWspro12/SUNWspro/bin/dmake -f Makefile CONF=Debug" in /home/meiry/SunStudioProjects/Quote_1
dmake: defaulting to parallel mode.
See the man page dmake(1) for more information on setting up the .dmakerc file.
sun8 --> 1 job
/opt/SUNWspro12/SUNWspro/bin/dmake -f nbproject/Makefile-Debug.mk SUBPROJECTS= .build-conf
sun8 --> 1 job
mkdir -p build/Debug/Sun9-Solaris-Sparc
CC    -c -g +w -o build/Debug/Sun9-Solaris-Sparc/disk.o disk.cc
sun8 --> 2 jobs
mkdir -p build/Debug/Sun9-Solaris-Sparc
CC    -c -g +w -o build/Debug/Sun9-Solaris-Sparc/cpu.o cpu.cc
sun8 --> Job output
mkdir -p build/Debug/Sun9-Solaris-Sparc
CC    -c -g +w -o build/Debug/Sun9-Solaris-Sparc/cpu.o cpu.cc
(/home/meiry/SunStudioProjects/Quote_1)cpu.cc:
"/opt/SUNWspro/prod/include/CC/Cstd/iostream.h", line 4: Error: istream is not a member of std.
"/opt/SUNWspro/prod/include/CC/Cstd/iostream.h", line 5: Error: cin is not a member of std.
"/opt/SUNWspro/prod/include/CC/Cstd/iostream.h", line 6: Error: ws is not a member of std.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 64: Error: Type name expected instead of "locale".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 65: Error: Type name expected instead of "locale".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 68: Error: streamsize is not defined.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 145: Error: Type name expected instead of "streamsize".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 146: Error: Type name expected instead of "streamsize".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 152: Error: Type name expected instead of "streamsize".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 167: Error: Type name expected instead of "locale".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 170: Error: Type name expected instead of "_RWSTDGuard".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 236: Error: Templates can only declare classes or functions.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 239: Error: Use ";" to terminate statements.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 239: Error: A declaration was expected instead of "return".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 239: Error: s is not defined.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 248: Error: basic_streambuf is not defined.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 248: Error: int_type is not defined.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 249: Error: Templates can only declare classes or functions.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 251: Error: Use ";" to terminate statements.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 251: Error: A declaration was expected instead of "if".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 251: Error: ")" expected instead of ">".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 251: Error: Unexpected ")" -- Check for matching parenthesis.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 251: Error: Operand expected instead of ")".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 253: Error: The function "gbump" must have a prototype.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 254: Error: traits is not defined.
Compilation aborted, too many Error messages.
:(/home/meiry/SunStudioProjects/Quote_1)cpu.cc
*** Error code 1
dmake: Fatal error: Command failed for target `build/Debug/Sun9-Solaris-Sparc/cpu.o'
Current working directory /home/meiry/SunStudioProjects/Quote_1
Waiting for 1 job to finish
sun8 --> Job output
mkdir -p build/Debug/Sun9-Solaris-Sparc
CC    -c -g +w -o build/Debug/Sun9-Solaris-Sparc/disk.o disk.cc
(/home/meiry/SunStudioProjects/Quote_1)disk.cc:
"/opt/SUNWspro/prod/include/CC/Cstd/iostream.h", line 4: Error: istream is not a member of std.
"/opt/SUNWspro/prod/include/CC/Cstd/iostream.h", line 5: Error: cin is not a member of std.
"/opt/SUNWspro/prod/include/CC/Cstd/iostream.h", line 6: Error: ws is not a member of std.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 64: Error: Type name expected instead of "locale".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 65: Error: Type name expected instead of "locale".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 68: Error: streamsize is not defined.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 145: Error: Type name expected instead of "streamsize".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 146: Error: Type name expected instead of "streamsize".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 152: Error: Type name expected instead of "streamsize".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 167: Error: Type name expected instead of "locale".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 170: Error: Type name expected instead of "_RWSTDGuard".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: While specializing "std::basic_streambuf<std::charT, std::traits>".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 185:     Where: Specialized in non-template code.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 236: Error: Templates can only declare classes or functions.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 239: Error: Use ";" to terminate statements.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 239: Error: A declaration was expected instead of "return".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 239: Error: s is not defined.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 248: Error: basic_streambuf is not defined.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 248: Error: int_type is not defined.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 249: Error: Templates can only declare classes or functions.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 251: Error: Use ";" to terminate statements.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 251: Error: A declaration was expected instead of "if".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 251: Error: ")" expected instead of ">".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 251: Error: Unexpected ")" -- Check for matching parenthesis.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 251: Error: Operand expected instead of ")".
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 253: Error: The function "gbump" must have a prototype.
"/opt/SUNWspro/prod/include/CC/Cstd/./streambuf", line 254: Error: traits is not defined.
Compilation aborted, too many Error messages.
:(/home/meiry/SunStudioProjects/Quote_1)disk.cc
*** Error code 1
dmake: Warning: Command failed for target `build/Debug/Sun9-Solaris-Sparc/disk.o'
Current working directory /home/meiry/SunStudioProjects/Quote_1
*** Error code 1
dmake: Fatal error: Command failed for target `.build-impl'
Build failed. Exit value 1.

Jar file is not getting executed from commandline

Hi ,
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it is giving me the error as
Exception in thread "main" java.lang.UnsupportedClassVersionError:com/build/deploy/Deploy (Unsupported major.minor version 49.0)
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I believe that something in your system is set up so that when you double click the jar, the correct java or javaw version is being used, but when you use the command line, an older version of java is being used.

Execute jar file: "could not find the main class" program will terminate

Hey,
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* GoListener.java
* Created on 12. september 2007, 21:48
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package grandmaster;
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import javax.swing.*;
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Thread.sleep(f*1000);
} catch (Exception exp) {
viewer.setText(" XX ");
viewer.paintImmediately(viewer.getBounds());
if (e.getActionCommand() == "VIEW") {
try {
//int numb = Integer.valueOf( TIP.getText() ).intValue();
StringTokenizer tokenizer = new StringTokenizer(TIP.getText(), " ");
String[] split = null;
int tokenCount = tokenizer.countTokens();
if (tokenCount > 0) {
split = new String[tokenCount];
for (int current = 0; current < tokenCount; current++) {
split[current] = tokenizer.nextToken();
viewer.setText(" " + String.valueOf(numbers) + " ");
// k=numbers(1);
/*while(c<i){
String.valueOf(k).equals(split[1]);
c++;
TIP.setText(" " + split[2] + " ");
} catch (Exception exp) {
try {
//string testit = numb.toString();
//String str = "" + numb;
//viewer.setText(str);
//viewer.setText(numbers.toString());
numbers.clear();
} catch (Exception exp) {
* Main.java
* Created on 12. september 2007, 21:07
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package grandmaster;
import java.util.Vector;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.JButton;
import java.awt.*;
import grandmaster.GoListener;
* @author Computer
public class Main extends JFrame {
private JTextField viewer;
public JTextField TIP;
// private TextInputPanel TIP;
private Vector numbers;
/** Creates a new instance of Main */
public Main() {
numbers = new Vector();
JPanel p = new JPanel(new GridLayout(0,4));
JButton go = new JButton();
JButton view_num = new JButton();
go.setText("Go!");
go.setVisible(true);
go.setActionCommand("GO");
view_num.setText("VIEW");
view_num.setVisible(true);
view_num.setActionCommand("VIEW");
JTextField max_num = new JTextField();
max_num.setText("5");
JTextField freq = new JTextField();
freq.setText("1");
viewer = new JTextField();
viewer.setText("XX");
TIP = new JTextField("");
p.add(go);
p.add(max_num);
p.add(freq);
p.add(view_num);
getContentPane().add(p,BorderLayout.NORTH);
getContentPane().add(viewer,BorderLayout.CENTER);
getContentPane().add(TIP,BorderLayout.SOUTH);
setSize(200,200);
GoListener g = new GoListener(viewer,TIP,max_num, freq, numbers);
go.addActionListener(g);
view_num.addActionListener(g);
* @param args the command line arguments
public static void main(String[] args) {
// TODO code application logic here
Main window = new Main();
window.setVisible(true);
}

NetBeans questions should be posted to the NB site. It has mailing lists and associated forums.
This tutorial from the NB site addresses running programs outside of NB
http://www.netbeans.org/kb/articles/javase-deploy.html
When you compare objects, use ".equals()" and reserve == for comparing values.

Executable JAR file: Could not find the main class.

Hello,
I have a problem with making an executable JAR file.
I have written a JAVA program that consists of five different classes of which User.java is the main class and I have saved a text document with Main-Class: User and a blank line after that.
If I try:
jar cmf MainClass.txt User.jar User.class Beheerder.class Operator.class Manager.class MaakVisueelSchema.class
it makes a executable jar file which actually works! :)
But when the Operator class trys to open the MaakVisueelSchema class the screen stays blank.
I can run MaakVisueelSchema with java MaakVisueelSchema.
So I tried to make an executable JAR that consists only of MaakVisueelSchema, the same way as I did for User:
Main-Class: MaakVisueelSchema
jar cmf MainClass.txt MaakVisueelSchema.jar MaakVisueelSchema.class
Then I get the error message:
Could not find the main class. Program will exit.
from the Java Virtual Machine Launcher.
The big difference between MaakVisueelSchema and the other classes is that MaakVisueelSchema contains a PaintComponent method and an ComponentListener. Is it possible that one of those creates the error?
Can anyone help me with this problem?
Thanks in advance!
Bye!

Yes,
I tried:
jar xvf MaakVisueelSchema.jar
and it returns:
META-INF/
META-INF/MANIFEST.MF
MaakVisueelSchema.classN/G. You need to manually create a manifest file in a text editor, have it point to your main class, and enter it in your jar command as an argument.

Executing jar file does not work

i am using net beans 4.1, jdk 1.4.2_09 and jre 5.0 update 4.
i create a jar in netbeans, exit netbeans, go to the directory where the jar has been placed and double click the jar file to run it. when i do so i get an hour glass momentarily and then nothing. the program does not execute. i hope i am not missing something very basic here. i assume i can run the program by double clicking the jar file ....
i have checked in netbeans to insure that all classes are in the jar, the manifest looks good, etc, etc. it looks like all the pieces of the jar are in place but the program will not run. please help.
thanks,
dave ...

Directory of C:\JAVA\PROJECTS\DIST
10/04/2005 10:09 AM <DIR> .
10/04/2005 10:09 AM <DIR> ..
10/04/2005 10:09 AM 25,203 gift_email.jar
1 File(s) 25,203 bytes
2 Dir(s) 124,456,144,896 bytes free
C:\JAVA\PROJECTS\DIST>echo %CLASSPATH%
c:\java\projects\dist;c:\Program Files\netbeans-4.1\ide5\modules\ext
C:\JAVA\PROJECTS\DIST>java -jar gift_email.jar
Exception in thread "main" java.lang.NoClassDefFoundError: org/netbeans/lib/awtextra/AbsoluteLayout
at giftrecpt.email.gift_email_gui.initComponents(gift_email_gui.java:38)
at giftrecpt.email.gift_email_gui.<init>(gift_email_gui.java:24)
at giftrecpt.email.gift_email_gui.main(gift_email_gui.java:142)
C:\JAVA\PROJECTS\DIST>
i added the location of the absolutelayout method to the classpath but still get the error. i also included this same reference in netbeans to the project under run-time libraries. so it seems that i have added the necesary references but still no luck. what could i be missing? the manifest makes no mention of class path. here it is below:
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.2
Created-By: 1.4.2_09-b05 (Sun Microsystems Inc.)
Main-Class: giftrecpt.email.gift_email_gui
X-COMMENT: Main-Class will be added automatically by build
thanks,
dave ...

Executable Jar file - Does not open

Hi,
I have an executable jar file. The icon of that executable jar is that of an unknown file instead of the normal java icon. So when I try to run that executable jar it shows 'open with'. What is the reason for this? What should be done in order that I can run this executable jar?
Anees

Associate .jar files with java -jar in your OS. I didnt get you.
Normally it should open with these softwares installed, rt?

.jar file is not working properly :developed in NETBEANS

Hi Gurus,
i am using NETBEANS IDE 7.2.
i am developing a project that interacts with databases 10g and COM ports of machine , these all processes are performed by .bat file which i am trying to run from jFramform , code works perfectly .bat file is also called perfectly when i run the project using F6 from the NETBEANS, for testing i placed some dialogue boxes on the form to test it ,
but when i run executable .jar file , form run successfully and dialogue box works perfectly but .bat file is not called by executable .jar file.
this is how i call the .bat file...
String filePath = "D:/pms/Libraries/portlib.bat";
        try {
          Process p = Runtime.getRuntime().exec(filePath);
        } catch (Exception e) {
            e.printStackTrace();
and below is the contents of portlib.bat file
java -jar "D:\SMS\SMS\dist\SMS.jar"
you must probably ask why i am calling a .jar file using .bat file .
reason is that this .jar project sends message using GSM mobile , System.exit(); is compulsory to complete a job and then do the next one ,
if i use the same file to execute this job it makes exit to entire the application (hope you can understand my logic).
that's why i use extra .jar file in .bat file , when single job is completed .bat exits itself and new command is given.
Problem is that code is working perfectly in NETBEANS when i run the project but when i run .jar then .bat file is not working ,
thanks.

Thanks Sir ,
You need to first test an example that works like the one in the article.
There are plenty of other examples on the web - find one you like:
http://javapapers.com/core-java/os-processes-using-java-processbuilder/
I tried this one.
try {
            ProcessBuilder dirProcess = new ProcessBuilder("D:/SMS/SMS/Send_message.bat");
             File commands = new File("D:/SMS/SMS/Send_message.bat");
             File dirOut = new File("C:/process/out.txt");
             File dirErr = new File("C:/process/err.txt");
           dirProcess.redirectInput(commands);
             dirProcess.redirectOutput(dirOut);
           dirProcess.redirectError(dirErr);
             dirProcess.start();
        } catch (IOException ex) {
            Logger.getLogger(mainform.class.getName()).log(Level.SEVERE, null, ex);
as instructed in the article i compiled both the projects at same version or sources and libraries which is 1.7
here is my version details
C:\>javac -version
javac 1.7.0_07
C:\>java -version
java version "1.7.0_07"
Java(TM) SE Runtime Environment (build 1.7.0_07-b11)
Java HotSpot(TM) Client VM (build 23.3-b01, mixed mode, sharing)
inside the NETBEANS IDE c:\process\err.txt remains empty and code works perfectly , but when I run executable .jar file( by double clicking on that file in dist directry) then c:\process\err.txt becomes full with this error text and there is no response from calling D:\SMS\SMS\send_message.bat
here is the error text
java.lang.UnsupportedClassVersionError: sms/SMSMAIN (Unsupported major.minor version 51.0)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
Exception in thread "main"
here is /SMS/SMS
unknown source ?

.jar file suddenly not working

I have some minimal experience working with .jar files, but I am baffled here.
Recently, the jar file for one of my programs stopped working. I had just made a change to my main class, so i repackaged the jar. Now it says "Can't find main class" when I try to run it. It will only work if I add the line
Class-Path: . (there is a period there)
to my manifest.
This would be fine, but I want to use exe4j to make it into a Windows executable. exe4j must do something where it does not honor the mainifest settings, because the executable gives out a "can't find main class" error no matter what.
What has happened? It is only an issue with this program, i have repackaged several others to test, and they work without the "Class-Path" workaround. I'm pretty sure that it's not something in the nature of the program itself, because it worked eariler, and my only change was a small one (the text of a few JLabels).
I have made sure that my main class is in the root of my jar file, and I have the Main-Class attribute correctly set in my manifest. The program runs fine outside the jar, but displays this odd behavior only when "jarred".
Any help would be greatly appreciated.

also, it's only the one class that's affected.
I tried setting the Main-Class to other classes in the jar, and that worked fine. When I tried to make a workaround, making one of the other classes' main call the one I wanted, i got a "fatal exception" error. I'm pretty sure it still couldn't find the file.

Jar file is not executing

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