My MacBook Can't open .Jar files.

Hi,
Whenever I try to open a .jar file, I get this error message:
I really need to be able to open .jar files. I have been able to open them in the past; I really don't know what happened.
Java is up to date.
Everything is up to date.
Java settings is set to default.
oh, I'm on Leopard Version 10.5.8 - I doubt the problem is the operating version though because I have been able to
open .jar files in the past without a problem.
Please help me. - I don't know what went wrong with my computer...
Thanks!
Jeremy

Ive been having the same problem for Three months it gets really frusterating

Similar Messages

I can`t open jar files though my java version is updated

Hello everybody, I`m using Macbook Pro 13` with Lion on it.
As it says in the title, I can`t open jar files though, my java version is updated.
It says, I shuld check the console.
Right now, my java version is, "1.7.0_15", and i`m trying to open a jar file created 3 days ago, by some developer.
Although, if im trying to open jar file created 1 year ago, it doe`s open.
Why is that? and, How can i fix it?
Thanks.

Franeo wrote:
Hello everybody, I`m using Macbook Pro 13` with Lion on it.
As it says in the title, I can`t open jar files though, my java version is updated.
It says, I shuld check the console.
With Java 6 and prior, you had to enable logging first before you could view error messages in Console. I am guessing that you need to check the Java Control Panel to see if logging is turned on.

Can't open .jar file, nothing happens when I click, MAC OS 10.6.8

Hello,
I can't open .jar file, nothing happens when I click on the .jar file.
I have MAC OS 10.6.8
The thing it, I have desktop application that I'm building on Netbeans and when I compile and deploy it... it runs from Netbeans folder where I have all the files but copying the .jar on the desktop. It says "The Java JAR file "blablabla.jar" could not be launched check the Console for possible error messages"
Any idea or solution will be appreciated.
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These are Java files. http://www.java.com/en/ is where you can get the latest Java for your operating system. If your Java files need an older version of Java, there are instructions on the web to downgrade Mac Java, but it is difficult, and poses security issues.

Can't open JAR files - tried everything

Hi guys.
So, I have this problem that I can' open .jar files. I'm getting this: "Java JAR-file could not start"
I have literally tried EVERYTHING.
This is what I have tried:
Uninstall, reinstall, restart Mac between every installation, have newest Java now (Java Standard Edition. Version 7 Update 67 (build 1.7.0_67.b01).
Tried this command: java -jar myfile.jar. This results in Unable to access .jarfile
Have googled and found a recent thread about this here on apple forum which lead to following this tutorial on YouTube: https://www.youtube.com/watch?v=lV3npU1NbHQ&feature=youtu.be&html5=1 which did not work either.
Console does not give me much when I try to open, but one time I got this:
04.10.14 00:01:48,571 java[554]: objc[554]: Class JavaLaunchHelper is implemented in both /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java and /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/jli/./libjli.dylib. One of the two will be used. Which one is undefined.
PLEASE help guys! I'm dying, this is so annoying, I really need to open the file.
Thanks in advance!

same happens with Yosemite (10.10)
double clicking on a jar file I get 'The java JAR file "forge-1.7.10-10.13.2.1231-universal.jar" could not be launched'
if I try javaws -viewer
I get:
objc[12654]: Class JavaLaunchHelper is implemented in both /Library/Internet Plug-ins/JavaAppletPlugin.plugin/Contents/Home/bin/java and /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/jli/./libjli.dylib. One of the two will be used. Which one is undefined.
if I remove the library /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/jli/./libjli.dylib the message disappears but still is impossible to run jar files
if I remove /Library/Internet Plug-ins/JavaAppletPlugin.plugin/Contents/Home/bin/java nothing happens anymore.
embarassing situation...

JDeveloper 11.1.2.1.0 on OEL 5 can't open jar files and dies

I have just installed JDeveloper on a OEL 5 VM, and when I try to open or create a basic application I get a series of errors claiming that that java could not open jar files, which ultimately ends in the app dying, claiming that it has too many open files. The failures below were generated using the wizard to create a brand new "Java Desktop Application (ADF)" application. I used all default values on installation, including the bundled Java SDK. I am trying to familiarize myself with JDeveloper in preparation for a new development project, and would like to use Oracle technology since Pillar is now a part of Oracle. Any help would be appreciated.
uname -a:
Linux az-devoelvm-01 2.6.32-300.4.1.el5uek #1 SMP Fri Dec 23 03:13:22 EST 2011 x86_64 x86_64 x86_64 GNU/Linux
Below is the final failure:
SEVERE: framework event org.eclipse.osgi type 2
java.io.IOException: Too many open files
     at java.io.UnixFileSystem.createFileExclusively(Native Method)
     at java.io.File.checkAndCreate(File.java:1704)
     at java.io.File.createTempFile(File.java:1792)
     at org.eclipse.osgi.storagemanager.StorageManager.createTempFile(StorageManager.java:714)
     at org.eclipse.osgi.storagemanager.StorageManager.getOutputStream(StorageManager.java:776)
     at org.eclipse.osgi.internal.baseadaptor.BaseStorage.saveBundleDatas(BaseStorage.java:550)
     at org.eclipse.osgi.internal.baseadaptor.BaseStorage.saveAllData(BaseStorage.java:439)
     at org.eclipse.osgi.internal.baseadaptor.BaseStorage.access$1(BaseStorage.java:427)
     at org.eclipse.osgi.internal.baseadaptor.BaseStorage$StateSaver.run(BaseStorage.java:1219)
And this is an example of the failures to open the jar files:
SEVERE: framework event oracle.external.weblogic-script-runner type 2
java.util.zip.ZipException: Exception in opening zip file: /home/earnett/Oracle/Middleware/modules/features/weblogic.server.modules_10.3.5.0.jar
     at org.eclipse.osgi.framework.util.SecureAction.getZipFile(SecureAction.java:264)
     at org.eclipse.osgi.baseadaptor.bundlefile.ZipBundleFile.basicOpen(ZipBundleFile.java:88)
     at org.eclipse.osgi.baseadaptor.bundlefile.ZipBundleFile.getZipFile(ZipBundleFile.java:101)
     at org.eclipse.osgi.baseadaptor.bundlefile.ZipBundleFile.checkedOpen(ZipBundleFile.java:74)
     at org.apidesign.netbinox.JarBundleFile$1.checkedOpen(JarBundleFile.java:119)
     at org.eclipse.osgi.baseadaptor.bundlefile.ZipBundleFile.getEntry(ZipBundleFile.java:246)
     at org.apidesign.netbinox.JarBundleFile.findEntry(JarBundleFile.java:199)
     at org.apidesign.netbinox.JarBundleFile.resource(JarBundleFile.java:163)
     at org.netbeans.core.netigso.spi.NetigsoArchive$1.resource(NetigsoArchive.java:71)
     at org.netbeans.Archive.getData(Archive.java:199)
     at org.netbeans.NetigsoFramework.fromArchive(NetigsoFramework.java:130)
     at org.netbeans.core.netigso.Netigso.fromArchive(Netigso.java:461)
     at org.netbeans.core.netigso.spi.NetigsoArchive.fromArchive(NetigsoArchive.java:101)
     at org.apidesign.netbinox.JarBundleFile.getCachedEntry(JarBundleFile.java:210)
     at org.apidesign.netbinox.JarBundleFile.getEntry(JarBundleFile.java:218)
     at org.eclipse.osgi.baseadaptor.bundlefile.BundleFile.internalGetResourceURL(BundleFile.java:151)
     at org.eclipse.osgi.baseadaptor.bundlefile.BundleFile.getResourceURL(BundleFile.java:147)
     at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findResourceImpl(ClasspathManager.java:351)
     at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalResources(ClasspathManager.java:329)
     at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalResources(DefaultClassLoader.java:212)
     at org.eclipse.osgi.internal.loader.BundleLoader.findLocalResources(BundleLoader.java:769)
     at org.eclipse.osgi.internal.loader.SingleSourcePackage.getResources(SingleSourcePackage.java:41)
     at org.eclipse.osgi.internal.loader.MultiSourcePackage.getResources(MultiSourcePackage.java:51)
     at org.eclipse.osgi.internal.loader.BundleLoader.findResources(BundleLoader.java:688)
     at org.eclipse.osgi.internal.loader.buddy.RegisteredPolicy.loadResources(RegisteredPolicy.java:114)
     at org.eclipse.osgi.internal.loader.buddy.PolicyHandler.doBuddyResourcesLoading(PolicyHandler.java:168)
     at org.eclipse.osgi.internal.loader.BundleLoader.findResources(BundleLoader.java:709)
     at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findResources(DefaultClassLoader.java:162)
     at java.lang.ClassLoader.getResources(ClassLoader.java:1039)
     at java.util.ServiceLoader$LazyIterator.hasNext(ServiceLoader.java:323)
     at java.util.ServiceLoader$1.hasNext(ServiceLoader.java:415)
     at oracle.adfdt.model.DataControlManager.addDataControlFilter(DataControlManager.java:763)
     at oracle.adfdtinternal.model.ide.dbpanel.DataControlFilterPalette.jbInit(DataControlFilterPalette.java:105)
     at oracle.adfdtinternal.model.ide.dbpanel.DataControlFilterPalette.<init>(DataControlFilterPalette.java:97)
     at oracle.adfdtinternal.model.ide.dbpanel.DataBindingDockeableWindow.<init>(DataBindingDockeableWindow.java:95)
     at oracle.adfdtinternal.model.ide.dbpanel.DataSourceDockableFactory.getDockWindow(DataSourceDockableFactory.java:62)
     at oracle.adfdtinternal.model.ide.dbpanel.DataSourceDockableFactory.getDockable(DataSourceDockableFactory.java:81)
     at oracle.ideimpl.docking.DockStationImpl.createDockable(DockStationImpl.java:1452)
     at oracle.ideimpl.docking.DockStationImpl.findDockable(DockStationImpl.java:1432)
     at oracle.ideri.navigator.NavigatorDockableFactory.createDrawer(NavigatorDockableFactory.java:70)
     at oracle.ideri.navigator.NavigatorDockableFactory.access$200(NavigatorDockableFactory.java:32)
     at oracle.ideri.navigator.NavigatorDockableFactory$ProxyAwareHostedDockableListener.hostedDockableRegistered(NavigatorDockableFactory.java:221)
     at oracle.ideimpl.docking.HostedDockableHook$2.run(HostedDockableHook.java:119)
     at oracle.ideimpl.extension.ExtensionManagerImpl$AfterExtensionLoadingRunnable.run(ExtensionManagerImpl.java:2130)
     at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
     at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
     at java.awt.EventQueue.access$000(EventQueue.java:85)
     at java.awt.EventQueue$1.run(EventQueue.java:603)
     at java.awt.EventQueue$1.run(EventQueue.java:601)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:612)
     at oracle.javatools.internal.ui.EventQueueWrapper._dispatchEvent(EventQueueWrapper.java:169)
     at oracle.javatools.internal.ui.EventQueueWrapper.dispatchEvent(EventQueueWrapper.java:151)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178)
     at java.awt.Dialog$1.run(Dialog.java:1046)
     at java.awt.Dialog$3.run(Dialog.java:1098)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.awt.Dialog.show(Dialog.java:1096)
     at java.awt.Component.show(Component.java:1585)
     at java.awt.Component.setVisible(Component.java:1537)
     at java.awt.Window.setVisible(Window.java:842)
     at java.awt.Dialog.setVisible(Dialog.java:986)
     at oracle.bali.ewt.dialog.JEWTDialog.runDialog(JEWTDialog.java:395)
     at oracle.bali.ewt.dialog.JEWTDialog.runDialog(JEWTDialog.java:356)
     at oracle.ideimpl.feedback2.client.ui.CustomerFeedbackDialog.runDialog(CustomerFeedbackDialog.java:110)
     at oracle.ideimpl.feedback2.client.FeedbackManagerImpl.showCustomerFeedbackDialog(FeedbackManagerImpl.java:525)
     at oracle.ideimpl.feedback2.client.FeedbackManagerImpl.showFeedbackDialog(FeedbackManagerImpl.java:360)
     at oracle.ideimpl.feedback2.client.FeedbackManagerImpl$2.run(FeedbackManagerImpl.java:238)
     at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
     at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
     at java.awt.EventQueue.access$000(EventQueue.java:85)
     at java.awt.EventQueue$1.run(EventQueue.java:603)
     at java.awt.EventQueue$1.run(EventQueue.java:601)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:612)
     at oracle.javatools.internal.ui.EventQueueWrapper._dispatchEvent(EventQueueWrapper.java:169)
     at oracle.javatools.internal.ui.EventQueueWrapper.dispatchEvent(EventQueueWrapper.java:151)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178)
     at java.awt.Dialog$1.run(Dialog.java:1046)
     at java.awt.Dialog$3.run(Dialog.java:1098)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.awt.Dialog.show(Dialog.java:1096)
     at java.awt.Component.show(Component.java:1585)
     at java.awt.Component.setVisible(Component.java:1537)
     at java.awt.Window.setVisible(Window.java:842)
     at java.awt.Dialog.setVisible(Dialog.java:986)
     at oracle.bali.ewt.dialog.JEWTDialog.runDialog(JEWTDialog.java:395)
     at oracle.bali.ewt.dialog.JEWTDialog.runDialog(JEWTDialog.java:356)
     at oracle.ide.dialogs.ProgressBar.start(ProgressBar.java:352)
     at oracle.ide.dialogs.ProgressBar.start(ProgressBar.java:243)
     at oracle.ide.dialogs.ProgressBar.start(ProgressBar.java:215)
     at oracle.jdeveloper.template.wizard.NewObjectFromTemplateWizard$WizardEventAdapter$1ProgressRunnable.start(NewObjectFromTemplateWizard.java:497)
     at oracle.jdeveloper.template.wizard.NewObjectFromTemplateWizard$WizardEventAdapter.wizardFinished(NewObjectFromTemplateWizard.java:537)
     at oracle.bali.ewt.wizard.BaseWizard.processWizardEvent(BaseWizard.java:2525)
     at oracle.bali.ewt.wizard.BaseWizard.processEventImpl(BaseWizard.java:2566)
     at oracle.bali.ewt.LWComponent.processEvent(LWComponent.java:658)
     at oracle.bali.ewt.wizard.BaseWizard.doFinish(BaseWizard.java:2171)
     at oracle.bali.ewt.wizard.BaseWizard$Action$1.run(BaseWizard.java:3948)
     at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
     at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
     at java.awt.EventQueue.access$000(EventQueue.java:85)
     at java.awt.EventQueue$1.run(EventQueue.java:603)
     at java.awt.EventQueue$1.run(EventQueue.java:601)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:612)
     at oracle.javatools.internal.ui.EventQueueWrapper._dispatchEvent(EventQueueWrapper.java:169)
     at oracle.javatools.internal.ui.EventQueueWrapper.dispatchEvent(EventQueueWrapper.java:151)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178)
     at java.awt.Dialog$1.run(Dialog.java:1046)
     at java.awt.Dialog$3.run(Dialog.java:1098)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.awt.Dialog.show(Dialog.java:1096)
     at java.awt.Component.show(Component.java:1585)
     at java.awt.Component.setVisible(Component.java:1537)
     at java.awt.Window.setVisible(Window.java:842)
     at java.awt.Dialog.setVisible(Dialog.java:986)
     at oracle.bali.ewt.wizard.WizardDialog.runDialog(WizardDialog.java:382)
     at oracle.bali.ewt.wizard.WizardDialog.runDialog(WizardDialog.java:298)
     at oracle.jdeveloper.template.wizard.NewObjectFromTemplateWizard.runWizard(NewObjectFromTemplateWizard.java:117)
     at oracle.jdeveloper.template.wizard.GalleryItemAdapter.invoke(GalleryItemAdapter.java:56)
     at oracle.ide.wizard.WizardManager.invokeWizard(WizardManager.java:446)
     at oracle.ide.wizard.WizardManager$1.run(WizardManager.java:530)
     at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
     at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
     at java.awt.EventQueue.access$000(EventQueue.java:85)
     at java.awt.EventQueue$1.run(EventQueue.java:603)
     at java.awt.EventQueue$1.run(EventQueue.java:601)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:612)
     at oracle.javatools.internal.ui.EventQueueWrapper._dispatchEvent(EventQueueWrapper.java:169)
     at oracle.javatools.internal.ui.EventQueueWrapper.dispatchEvent(EventQueueWrapper.java:151)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: java.util.zip.ZipException: error in opening zip file
     at java.util.zip.ZipFile.open(Native Method)
     at java.util.zip.ZipFile.<init>(ZipFile.java:127)
     at java.util.zip.ZipFile.<init>(ZipFile.java:144)
     at org.eclipse.osgi.framework.util.SecureAction$14.run(SecureAction.java:255)
     at java.security.AccessController.doPrivileged(Native Method)
     at org.eclipse.osgi.framework.util.SecureAction.getZipFile(SecureAction.java:253)
     ... 146 more

Hi
I run JDeveloper on Ubuntu without a problem, please make sure you have enough permissions on the directory where JDeveloper was installed. Also have you make the installation with the same user? What's your JDK version?
- Juan Camilo

Can't open .jar file

I'm running OS X 10.9.1 on a MacBook Air with the newest Java. For some reason, whenever I try to open a .jar file, it gives me a message saying "The Java JAR file... could not be launched. Check the console for possible error messages." How do I get it to run?

You downloaded the wrong thing if you wanted jar.exe. The J2RE d/l is the runtime only package, and doesn't contain the developer tools.
To download the current developer version of Java, go here:
http://java.sun.com/j2se/1.4.1/download.html
and click on the word DOWNLOAD in the column labeled SDK in this line:
Windows (all languages, including English)
After downloading, click on this page of installation instructions and read through #6:
http://java.sun.com/j2se/1.4.1/install-windows.html
NOTE: If you are installing on other than a standard 32-bit Windows system, go to this page:
http://java.sun.com/j2se/1.4.1/install.html and choose the installation instructions for your system.
Install the software according to the preceeding instructions

Can not open JAR file?

Hello,
My friend and I are working on a Calculus Project in which he made a Java applet that shows how a function's derivative is found... regardless! He made this file on a Linux based computer and saved it as a .jar file and sent to me via email. I downloaded the file and double clicked it, but the file didnt open, instead it displayed this message:
"The Java JAR File "Calc_Deriv.jar" could not be launched.
Please check the console for possible errors"
I checked the console, and to be honest I had absolutely no clue what I was looking at. Here were the messages from the last 10 minutes.
Code:
12/15/09 6:01:11 PM [0x0-0x10d10d].com.apple.JarLauncher[3275] SystemFlippers: didn't consume all data for long ID 0 (pBase = 0x10012fc90, p = 0x10012fc94, pEnd = 0x10012fc98)
12/15/09 6:01:11 PM [0x0-0x10d10d].com.apple.JarLauncher[3275] SystemFlippers: didn't consume all data for long ID 0 (pBase = 0x1001116f0, p = 0x1001116f4, pEnd = 0x1001116f8)
12/15/09 6:01:11 PM [0x0-0x10d10d].com.apple.JarLauncher[3275] Exception in thread "main"
12/15/09 6:01:11 PM [0x0-0x10d10d].com.apple.JarLauncher[3275] java.lang.NoClassDefFoundError: org/jdesktop/application/SingleFrameApplication
12/15/09 6:01:11 PM [0x0-0x10d10d].com.apple.JarLauncher[3275] at java.lang.ClassLoader.defineClass2(Native Method)
12/15/09 6:01:11 PM [0x0-0x10d10d].com.apple.JarLauncher[3275] at java.lang.ClassLoader.defineClass(ClassLoader.java:774)
12/15/09 6:01:11 PM [0x0-0x10d10d].com.apple.JarLauncher[3275] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:160 )
12/15/09 6:01:11 PM [0x0-0x10d10d].com.apple.JarLauncher[3275] at java.net.URLClassLoader.defineClass(URLClassLoader.java:254)
12/15/09 6:01:11 PM [0x0-0x10d10d].com.apple.JarLauncher[3275] at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
12/15/09 6:01:11 PM [0x0-0x10d10d].com.apple.JarLauncher[3275] at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
12/15/09 6:01:11 PM [0x0-0x10d10d].com.apple.JarLauncher[3275] at java.security.AccessController.doPrivileged(Native Method)
12/15/09 6:01:11 PM [0x0-0x10d10d].com.apple.JarLauncher[3275] at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
12/15/09 6:01:11 PM [0x0-0x10d10d].com.apple.JarLauncher[3275] at java.lang.ClassLoader.loadClass(ClassLoader.java:316)
12/15/09 6:01:11 PM [0x0-0x10d10d].com.apple.JarLauncher[3275] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)
12/15/09 6:01:11 PM [0x0-0x10d10d].com.apple.JarLauncher[3275] at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
I do not know where to start, nor where to end, nor what I am looking for. But essentially I simply need to open this file and see what is inside.
--System--
Model Name: MacBook Pro
Model Identifier: MacBookPro4,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.4 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 3 MB
Memory: 2 GB
Bus Speed: 800 MHz
Boot ROM Version: MBP41.00C1.B03
SMC Version (system): 1.27f2
Serial Number (system): W8**T1YJX
Hardware UUID: 9FC62D3C-021A-5C2A-9197-134226381FE9
Mac OSX 10.5.8
Thank you very much for the help!

In a Terminal session you could try something like
unzip -l path/to/jar/file
Dave

My Macbook won't open .jar files

My daughter wants to set up a server on mine craft but every time she opens the .jar file it presents this message. On safari or chrome, I've looked at several different boards and help pages but none of it makes much sense. Could someone please help?

The security built into your Mac is preventing you from doing this. In order to launch the Minecraft Server, try and launch it and get the error dialog above, and click the "OK" button. Then go into "System Preferences..." by hitting the Apple logo in the upper right of the screen, and then go into "Security & Privacy". You will see this screen:
Hit the button "Open Anyway" to open theMinecraft server jar (a dialog will come up, hit "open"). Once you do this that .jar file will now always open with no prompting. You can also change this behavior by twiddling with the radio buttons above to select "Mac App Store" or "Mac App Store and Identified developers" or "Anywhere". As you can see I have it set to "Mac App Store" and I will choose on a case by case basis; this is safest.
Minecraft will create a bunch of files in the directory in which the .jar file is placed, I would recommend creating a new directory and moving the .jar file there before starting it. The most imporant of these is the "server.properties" file, it is here that your daughter can change how this game behaves. Additionally, by invoking mincraft this way you allowcate the default amount of memory to the server, this may or may not be enough. There are reams of tutorials on how to tweek Minecraft server elsewhere on the web, enjoy!
Good Luck!

Can't open .jar file? (I have Lion)

I have written a program in Eclipse, and I exported it as a runnable jar to my desktop. But when I go and click on it I get this message:
The Java Jar file "Four Room Game.jar" could not be launched
check the console for possible error messages
what is wrong with it and how can I fix it?

Izeki3l wrote:
It says I have Java 7
Were you able to turn logging on, try the .jar again and then read the log?
I know nothing about Eclipse, but I do know there are many applications and web sites that are not Java 7 compatible. You will probably have to check with the developer and find out if Eclipse is and if an update is available or in the works. You will most probably need to have information from the Java log to submit to the developer.

Can't open .jar file, says it cannot be launched, Help?

I'm trying to download this mod for a game called minecraft. It involves opening a jar file to begin the installation, but everytime i click on the jar file it comes up with this message: The Java JAR file “YOGBOX Installer.jar” could not be launched. Check the Console for possible error messages.     I have checked the Console and there doesn't seem to be any recent messages. I have tried opening the file with a different application than the default Java launcher, but it doesn't open the installation window i need. Please help, i have tried all i could. Any ideas?

This is what popped up after i typed all that in :
Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file
          at java.lang.ClassLoader.defineClass1(Native Method)
          at java.lang.ClassLoader.defineClass(ClassLoader.java:676)
          at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
          at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
          at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
          at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
          at java.security.AccessController.doPrivileged(Native Method)
          at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
          at java.lang.ClassLoader.loadClass(ClassLoader.java:317)
          at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)
          at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
          at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:375)

I can't open .jar installation files

i send a file with JAR extension to my handphone (N6230i), but my handphone can't recognize it as an installation file. Can you help me? thanks.

Franeo wrote:
Hello everybody, I`m using Macbook Pro 13` with Lion on it.
As it says in the title, I can`t open jar files though, my java version is updated.
It says, I shuld check the console.
With Java 6 and prior, you had to enable logging first before you could view error messages in Console. I am guessing that you need to check the Java Control Panel to see if logging is turned on.

My Mac won't open ".jar" files anymore.

I upgraded to OSX Mavericks and now I can't open .jar files anymore. It keeps saying Theis file cannot be opened because it is from an unidentified developer. What do I do?

control click and select "open"

Why can't my MacBook open .Jar files?

Hi,
Whenever I try to open a .jar file, I get this error message:
I really need to be able to open .jar files. I have been able to open them in the past; I really don't know what happened.
Java is up to date.
Everything is up to date.
Java settings is set to default.
oh, I'm on Leopard Version 10.5.8 - I doubt the problem is the operating version though because I have been able to
open .jar files in the past without a problem.
Please help me. - I don't know what went wrong with my computer...
Thanks!
Jeremy

I am having the same problem -
I’m trying to install this “copious dogs” mod on my work computer (MacBook Pro).
I can’t open the JAR file. I get an error message saying “Copious dogs … cannot be launched. Check the Console for possible errors …”
I’ve been on all kinds of boards that tell me to install a bunch of Java apps and whatnot. None of that has worked.
I’ve found other boards that say to open the .jar file with my archive utility. I can do that and get to a “cpgz” file. But then when I try to open that I get another .jar file – which I can’t open.
Other boards say to go to the apple store and download “Unarchiver.”
But when I go to the mac store and search for “unarchiver” I’m taken to a “Dashboard Widgets: iPhone News” download – and that’s about when I start to pull my hair out and give up.
What am I doing wrong ?

Hello! i am new to Macbook pro, i have recently transferred my data from my Pc to Mac, i can not open .exe file. Please give me any suggestion regarding this!

hello! i am new to Macbook pro, i have recently transferred my data from my Pc to Mac, i can not open .exe file. Please give me any suggestion regarding this!
I have using Mac OS 10.9.2

Try running it through WineSkin or CrossOver Mac, or installing Windows through VirtualBox, Parallels Desktop, VMware Fusion, Boot Camp, or similar software.
(106527)

I can't open pages files from USB and iCloud due to : "The necessary file index.xml is missing".

I can't open pages files from USB and iCloud due to : "The necessary file index.xml is missing". Original file is written on iMac (2014) and saved to an USB stick and then transferred till macBook Pro (2009, Yosemite) for editing. Then I shared the files by iCloud but I am not able to open them on iMac again. Niether can I use the USB stick to transfer the edited files back. I'm running Pages '09 4,1 (923) on the macBook and Pges 5.5.2 (2120) on the iMac.
Håkan

Pages 5.5.2 is extremely incompatible with even other Macs let alone the vast majority of PC and MsWord users out there, so not a good idea to leap into the fire with both eyes shut.
After having done that to the first Pages 5 files, Apple has repeatedly done it to even the most minor point updates. Apple can't even anticipate its own erratic changes let alone what everyone else needs doing.
Peter

My MacBook Can't open .Jar files.

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