After being JAR, what's next?

[illuminist]

I've build my game as JAR file run run it on MSwindows, it work.

But after I passed it to Ubuntu on VMware, it said java.lang.UnsatisfiedLinkError: no lwjgl in java.library.path.

What should I do?

[illuminist]

If anyone has idea about integrated java environment in project for cross platforming, tell me please.

[Matthias]

You need to specify the property "java.library.path" to point to the native files for the correct OS like this:
java -Djava.library.path=natives/linux -jar myApp.jar

On windows it will look into the current folder by default - on Linux you have to explicitly tell it where to look

[kappa]

If you still want to manually distribute it your app, here is an example of how you can use batch files to do it. (its using a pretty old version of lwjgl so you'll have to update it)

alternatively you can use java web start.

[Ciardhubh]

You can set the library dir in Java, so you don't need a batch file.

Here's how I did it some time ago (run this before loading LWJGL, the idea is to get the directory of the .jar and work from there by adding subdirs based on OS):

       /* Set lwjgl library path so that LWJGL finds the natives depending on the OS. */
        String osName = System.getProperty("os.name");
        // Get .jar dir. new File(".") and property "user.dir" will not work if .jar is called from
        // a different directory, e.g. java -jar /someOtherDirectory/myApp.jar
        String nativeDir = "";
        try {
            nativeDir = new File(this.getClass().getProtectionDomain().getCodeSource().getLocation().
                    toURI()).getParent();
        } catch (URISyntaxException uriEx) {
            try {
                // Try to resort to current dir. May still fail later due to bad start dir.
                uriEx.printStackTrace();
                nativeDir = new File(".").getCanonicalPath();
            } catch (IOException ioEx) {
                // Completely failed
                ioEx.printStackTrace();
                JOptionPane.showMessageDialog(this, "Failed to locate native library directory. " +
                        "Error:\n" + ioEx.toString(), "Error", JOptionPane.ERROR_MESSAGE);
                System.exit(-1);
            }
        }
        // Append library subdir
        nativeDir += File.separator + "lib" + File.separator + "native" + File.separator;
        if (osName.startsWith("Windows")) {
            nativeDir += "windows";
        } else if (osName.startsWith("Linux") || osName.startsWith("FreeBSD")) {
            nativeDir += "linux";
        } else if (osName.startsWith("Mac OS X")) {
            nativeDir += "macosx";
        } else if (osName.startsWith("Solaris") || osName.startsWith("SunOS")) {
            nativeDir += "solaris";
        } else {
            JOptionPane.showMessageDialog(this, "Unsupported OS: " + osName + ". Exiting.",
                    "Error", JOptionPane.ERROR_MESSAGE);
            System.exit(-1);
        }
        System.setProperty("org.lwjgl.librarypath", nativeDir);