How to run exe (jar) file in java?

hello,
i can retrieve jar file but can't run from outside of JBuilder ..why?
can u help me, pls?
nway nge

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Similar Messages

How to run a jar file using Java application.

Hi all,
I know that jar file can run using the following command, using the command prompt.
java -jar jar-fileBut I don't know how to run that command through a Java code. Hope it's clear to you.
So can you please explain how can I do it.
Thanks,
itsjava

rayon.m wrote:
The solution given by ropp appears to have nothing to do with what you asked about.Ok sir, I got the point.
I've try a test as follows. But it doesn't give any output. Even not an exception.
        try {
            String[] temp = new String[]{"java", " -jar", " MainApp.jar"};
            Runtime rt = Runtime.getRuntime();
            Process proc = rt.exec(temp);
            int exitVal = proc.waitFor();
            System.out.println("ExitValue: " + exitVal);
            System.out.println("Temp_Values");
        catch(InterruptedException ex) {
            System.out.println(ex.getMessage());
        catch (IOException ex) {
            System.out.println(ex.getMessage());
        }I've debug and see, but the exitValue is even not exist at run time. Can you tell me where I'm going wrong.

How to run a jar file

hi
can anybody tell me how to run a jar file in java,is there any need to unzip a jar file before running it?
Thanks in advance.

Set the classptha, if you want to run it by double clicking.
I assume that you know, how to set the classpath.I though that if it is an executable jar, the classpath environment variable will be completely ignored. Are you saying something to the contrary?

How to run a JAR file in Unix system?

hi there
ca anyone tell me how to run a JAR file in unix system or X window, thank you

You want to create an executable JAR file? You do it in the following way.
Create a manifest file such as manif.txt and the contents should contain
Main-Class: foo
assuming foo is the name of your main class. Then create the jar as follows
jar cvfm foo.jar manif.txt foo.class
I hope that helps you!
you can find more info here http://java.sun.com/docs/books/tutorial/jar/

How to run a jar file in JBuilder

Hi there
I need to know how to run a jar file using JBuilder. Thanks :)
Countess

well i have a german version of jbuilder and there it is under
experten Archiv-builder
look at something that has a similar name

How to run a jar file in a browswer?

Hi, everyone:
I got a problem here. I would like to run my jar file in a html-based brower, should I write another applet for my jar file? How can I do that? (I don't have applet in my jar file, but only JFrame) Is there any way I can put a runnable jar file into an applet and show on the brower? Could anyone show me how to write this code? Thank you very much!!
-jxchou

At first you need a java plug-in for your browser.
Next you have to implement an applet in your jar-file.
The tag in your html-document should look like:
<applet code="Sample.class" archive="sample.jar" width="400" height="400"></applet>

Running a jar file from java code

Hi!
Im trying to run a jar file from my code.
I've tried Classloader, but that doesnt work because it doesnt find the images (also embedded in the 2nd jar file).
WHat I would like to do is actually RUN the 2nd jar file from the first jar file. There must be a way to do this right?
any ideas?

ok, I found some wonderful code (see below) that will try to start the jar. But it doesn't. What it does is produce the following error when my application runs...
So it's not finding the images in the jar file that I am trying to run? Strange. I checked the URL that sending, but it seems ok....
I think I will check the url again to make sure......
any ideas?
Uncaught error fetching image:
java.lang.NullPointerException
     at sun.awt.image.URLImageSource.getConnection(Unknown Source)
     at sun.awt.image.URLImageSource.getDecoder(Unknown Source)
     at sun.awt.image.InputStreamImageSource.doFetch(Unknown Source)
     at sun.awt.image.ImageFetcher.fetchloop(Unknown Source)
     at sun.awt.image.ImageFetcher.run(Unknown Source)
the code....
/* From http://java.sun.com/docs/books/tutorial/index.html */
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.JarURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.jar.Attributes;
* Runs a jar application from any url. Usage is 'java JarRunner url [args..]'
* where url is the url of the jar file and args is optional arguments to be
* passed to the application's main method.
public class JarRunner {
public static void main(String[] args) {
    URL url = null;
    try {
      url = new URL(args[0]);//"VideoTagger.jar");
    } catch (MalformedURLException e) {
      System.out.println("Invalid URL: ");
    // Create the class loader for the application jar file
    JarClassLoader cl = new JarClassLoader(url);
    // Get the application's main class name
    String name = null;
    try {
      name = cl.getMainClassName();
    } catch (IOException e) {
      System.err.println("I/O error while loading JAR file:");
      e.printStackTrace();
      System.exit(1);
    if (name == null) {
      fatal("Specified jar file does not contain a 'Main-Class'"
          + " manifest attribute");
    // Get arguments for the application
    String[] newArgs = new String[args.length - 1];
    System.arraycopy(args, 1, newArgs, 0, newArgs.length);
    // Invoke application's main class
    try {
      cl.invokeClass(name, newArgs);
    } catch (ClassNotFoundException e) {
      fatal("Class not found: " + name);
    } catch (NoSuchMethodException e) {
      fatal("Class does not define a 'main' method: " + name);
    } catch (InvocationTargetException e) {
      e.getTargetException().printStackTrace();
      System.exit(1);
private static void fatal(String s) {
    System.err.println(s);
    System.exit(1);
* A class loader for loading jar files, both local and remote.
class JarClassLoader extends URLClassLoader {
private URL url;
   * Creates a new JarClassLoader for the specified url.
   * @param url
   *            the url of the jar file
public JarClassLoader(URL url) {
    super(new URL[] { url });
    this.url = url;
   * Returns the name of the jar file main class, or null if no "Main-Class"
   * manifest attributes was defined.
public String getMainClassName() throws IOException {
    URL u = new URL("jar", "", url + "!/");
    JarURLConnection uc = (JarURLConnection) u.openConnection();
    Attributes attr = uc.getMainAttributes();
    return attr != null ? attr.getValue(Attributes.Name.MAIN_CLASS) : null;
   * Invokes the application in this jar file given the name of the main class
   * and an array of arguments. The class must define a static method "main"
   * which takes an array of String arguemtns and is of return type "void".
   * @param name
   *            the name of the main class
   * @param args
   *            the arguments for the application
   * @exception ClassNotFoundException
   *                if the specified class could not be found
   * @exception NoSuchMethodException
   *                if the specified class does not contain a "main" method
   * @exception InvocationTargetException
   *                if the application raised an exception
public void invokeClass(String name, String[] args)
      throws ClassNotFoundException, NoSuchMethodException,
      InvocationTargetException {
    Class c = loadClass(name);
    Method m = c.getMethod("main", new Class[] { args.getClass() });
    m.setAccessible(true);
    int mods = m.getModifiers();
    if (m.getReturnType() != void.class || !Modifier.isStatic(mods)
        || !Modifier.isPublic(mods)) {
      throw new NoSuchMethodException("main");
    try {
      m.invoke(null, new Object[] { args });
    } catch (IllegalAccessException e) {
      // This should not happen, as we have disabled access checks
}

How to run my jar file on a webserver

hello everybody,
I've created a chat aplication which consists of a client-side and server-side. The client-side is an applet and is working fine. But i'm getting problem with the server-side. Actually, it is working fine on my local system and even in a local area network. But now, i want to put the server-side on a webserver. So, i want to know how can i do that. My server-side is a jar file "chatserver.jar" which i've developed using frame containers. I want to know also how to run the chatserver.jar on the webserver. Is it that i should have implemented jsp? Or javascript? coz my chatserver must be always running 24/7. It must not be available to user. users will chat through applets and the data will be sent to the server-side which will in turn control and recognise those data. Can anyone please help me in that issue.

that was very kind of u for replying to me. thanks a lot. Well, the web software i'm running is nothing soo great but it's simply a chat server side application. In this application, i'm using a thread where my datagram socket will keep on receiving data from clients and this server side apllication must response to the client. For example, if a client has added a new room, or a new user has logged in, the server side must take care to inform all other clients that a new user has just logged in or a new room has been created. The main method is in the "chatserver.class". Then, i've combined all my classes including the chatserver.class into a jar file. When i click on the jar file on my local system or on the server of a local area network, it works beautifully. So, my server side application works like that. I have to click on the chatserver.jar once and nothing else. No other interaction with the applicaion. But my problem is how to run it on a web-server like apache. Or even if i upload this software on a website, how do i make it run? Shall i implement jsp codes? If yes, how to execute such jar file using jsp?
here are part of the codes where my datagramsocket is receiving message from clients:
public void run()
     while(thread!=null)
          byte[] recbuf=new byte[65536];
          recpacket=new DatagramPacket(recbuf,recbuf.length);
          try{
               servsocket.receive(recpacket);
               if(servsocket==null)
     byte[] bt=recpacket.getData();
     String recvmess = new String(bt, 0, recpacket.getLength());
     InetAddress clientaddress=recpacket.getAddress();
     int clientport=recpacket.getPort();
     chatcom=new chatcom(this,clientaddress,clientport,recvmess);
     try{
          thread.sleep(10);
     catch(InterruptedException _INExc)
chatcom is another class which i've created to differentiate if the data received is a message, new room, new user, etc... I've created my own RFC to make those differences. Like i said above, if a client has created a new room, the chatcom class will recognise that a new room has to be created and will therefore send the new room created to all other clients. So, i want to know how to get my "chatserver.jar" run on a web server like apache or even on a website if i want to upload this software. Coz once it starts running, i dnt hav to close the application. I mean to say that this application will have to run 24/7. Do i have to execute it externally using jsp codes? Is there any way to get my application run on a webserver?

How can i put Jar Files in Java Runtime.?

HI,
how can i put jar files in JRE so that they are accessible every where.? is there some way.?
Regards,
AA

Closest you could get to this I think is to explode all your jars into the same parent directory. Then if you put that directory on the classpath, you should be able to access all classes in all jar files

How to run a Jar file during runtime

Runtime.getRuntime().exec("javaw -jar MYJAR.jar");was what I used to run the jar originally, and it worked. Recently I created an installer for my program, where the user runs a batch-file shortcut which launches the main application. Because the main application is launched from the desktop, rather than directly, the "user.dir" property is different which makes the above code not work. How do I get the name of the folder that contains the running java application?
Thanks

You don't. You fix the installer so that it puts the correct working directory into the shortcut that it creates.

How to run a jar file in a HTML page.

Hi, i have created an applet that works with 2 or 3 classes, the i have done a Jar file and now i want to run the applet though a Html page, i have looked at many manuals and i have done the same as is said to create the Html file, but whe i want to see the page on the part of the applet nothing appears to me and when i go though the area of the applet with de mouse an error message apears saying that the clas XXXX (the main class of my applet) can't be instanced.
Could someone tell me why is this? i need help or to see an example that works.
Thanks

Hi, i have created an applet that works with 2 or 3
classes, the i have done a Jar file and now i want to
run the applet though a Html page, i have looked at
many manuals and i have done the same as is said to
create the Html file, but whe i want to see the page
on the part of the applet nothing appears to me and
when i go though the area of the applet with de mouse
an error message apears saying that the clas XXXX (the
main class of my applet) can't be instanced.
Could someone tell me why is this? i need help or to
see an example that works.
ThanksUse the archive parameter in the applet tag.
e.g: <applet code="your_main_applet" width="256" height="256" archive="myjar.jar">
Where myjar.jar is the actual jar file which contains all the user class files which are required to run this applet.
For creation of jar files, please read the java tutorial in http://java.sun.com
/Sreenivasa Kumar Majji.

Explain how to run a jar file in Openscript in OATS.

Hi..
I have a jar file which essentially compares two files.I want to run it from Openscript. Please explain me the steps in detail (after adding in the assets field)
Thanks in advance
regards
Harsha

Hi,
If you know the class name in that jar file create an object for that class and invoke function you needed.
Regards,
Deepu M

How to run a batch file using java

Hi guys,
I want to run a batch file by running a java program.
i have tried for this code, but it is not working , plz guide me code.
Runtime r = Runtime.getRuntime();
     Process p = null;
     try
          String[] cmd ={"cmd","/c","C:\\jarkarta-tomcat-3.2.3\\webapps\\DDS\\Resumes\\leap.bat"};
          p = r.exec(cmd);
     catch(Exception e)
     System.out.println("Exception in Runtime batch processing."+e);
     }

You will need this:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html

How to run a jar file which needs another jar to be in the class path

Hi,
I need to execute a jar, which needs another jar to be in the classpath.
If I run like
java -classpath <jar1 name> -jar <main jar>
It is giving classnotfoundexception, where as the class is available in the <jar1 name>.
so, currently I am doing like this
In the manifest file i have given like
Main-Class: <class name>
Class-Path: <jar name> <jar name2>
then it is running fine. But, if I want to change the jar location again I need to changed the manifest file.
Is there any way to do this? Pls help me.

How about
java -cp jar1.jar;jar2.jar com.acme.MainClass
You won't need to worry about the manifest file after that and you can make a bat files (or .sh file in *nix) for it.

How to sign a .jar file in java 6?

I know how to do it in java 5. One I have generated myKeystore I do this:
keytool -selfcert -alias mySelf -keystore myKeyStore
but, selfcert parameter doesn't exit in java 6, What i have to do?.
Thanks, everybody.

According to http://java.sun.com/javase/6/docs/technotes/tools/windows/keytool.html the -selfcert option does still exist, it's just no longer documented.

How to run exe (jar) file in java?

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