Getting class not found Exception when running in eclipse
I am running the following code in eclipse but getting a class not found exception:
import org.eclipse.jface.window.Window;
import org.eclipse.swt.SWT;
import org.e开发者_Go百科clipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class DialogClass {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("TEst");
Shell frame = new Shell(SWT.SHELL_TRIM);
PublishGenericArtefactDialog publishGenericArtefactDialog =
new PublishGenericArtefactDialog(frame);
publishGenericArtefactDialog.setTitle("Test");
if (publishGenericArtefactDialog.open() == Window.CANCEL){
try {
throw new Exception("Cancelled");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
and error i am getting is
TEst
Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/core/runtime/IStatus
at DialogClass.main(DialogClass.java:19)
Caused by: java.lang.ClassNotFoundException: org.eclipse.core.runtime.IStatus
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)
... 1 more
need help
As mentioned in this thread
Have you listed the
org.eclipse.core.runtime
as a plugin dependency in theManfest.MF
?
I think that theIStatus
is actually in an Equinox package, but the runtime includes the equinox plugin at runtime.
If you're just running it as a Java application (e.g. by sticking Jars on the classpath) then you'll probably need theorg.eclipse.equinox.core/runtime
or similar.Thanks for your suggestion. The problem was solved by adding
org.eclipse.equinox.common
andorg.eclipse.core.commands
to the Java Build Path property for the project - which I run as an SWT application.
As mentioned by AlBlue in the comment, the Eclipse wiki on JFace confirms:
JFace can be used in standalone SWT+JFace apps, without requiring the Eclipse Runtime or other parts of the Eclipse Platform.
This was made easier to do in 3.2 (2006), with the only prerequisites for JFace being reduced to:
- SWT,
- the new
org.eclipse.equinox.common
plug-in,- and
org.eclipse.core.commands
plug-in.For more details, see Bug 49497.
In 3.3 an optional dependency on the
org.osgi.framework
package was added which is defined in theorg.eclipse.osgi
.
If this plug-in is absent JFace will continue to function but without the benefit of internationalization support for its images.
The classpath for compiling isn't necesarily the same as the runtime classpath. There is a launch config (Run->Run...) will shoe you what is there.
Note that the SWT jar is just the API classes - you'll need a per-os binary for the real runtime classes, so that might be missing. If you add the "swt" classpath container then it should do the right thing.
What's the contents of .classpath inbyout current project?
When you run your exported product, if you see something like,
org.osgi.framework.BundleException:
The activator org.eclipse.ui.internal.WorkbenchPlugin
for bundle org.eclipse.ui.workbench is invalid
...
Caused by: java.lang.ClassNotFoundException: org.eclipse.swt.SWTError
It may be fixed via:
- Open the product configuration editor on your product file
- Click the "Launching" tab
- clear out the "Program Arguments" and "VM Arguments" fields.
- Re-export the product
Did you imported something for this?
PublishGenericArtefactDialog publishGenericArtefactDialog =
new PublishGenericArtefactDialog(frame);
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