Launch RCP application from Eclipse 3.3/3.4, but failed

[maoyang]

Hi Sir:
I've download RCP developer 3.5.0 and installed it , I also followed your website's how to to created a RCP application from Contact manager template, but when I tried to launch the RCP applicaion from eclipse IDE , I got the exception message as below

Code: Select all

!SESSION 2008-07-03 18:13:36.546 -----------------------------------------------
eclipse.buildId=unknown
java.version=1.5.0_15
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=zh_TW
Framework arguments:  -application com.esast.contactmanager.application
Command-line arguments:  -application com.esast.contactmanager.application -data C:\Documents and Settings\maoyang\獢\testgantt/../runtime-com.esast.contactmanager.product -dev file:C:/Documents and Settings/maoyang/獢/testgantt/.metadata/.plugins/org.eclipse.pde.core/com.esast.contactmanager.product/dev.properties -os win32 -ws win32 -arch x86

!ENTRY org.eclipse.osgi 4 0 2008-07-03 18:13:37.155
!MESSAGE Application error
!STACK 1
org.eclipse.core.runtime.CoreException: Plug-in com.esast.contactmanager was unable to load class com.esast.contactmanager.Application.
   at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.throwException(RegistryStrategyOSGI.java:180)
   at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:164)
   at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:788)
   at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)
   at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:51)
   at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:165)
   at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
   at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
   at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
   at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
   at java.lang.reflect.Method.invoke(Unknown Source)
   at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:508)
   at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447)
   at org.eclipse.equinox.launcher.Main.run(Main.java:1173)
   at org.eclipse.equinox.launcher.Main.main(Main.java:1148)
org.eclipse.core.runtime.CoreException[1]: java.lang.UnsupportedClassVersionError: Bad version number in .class file
   at java.lang.ClassLoader.defineClass1(Native Method)
   at java.lang.ClassLoader.defineClass(Unknown Source)
   at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.defineClass(DefaultClassLoader.java:161)
   at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineClass(ClasspathManager.java:501)
   at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findClassImpl(ClasspathManager.java:471)
   at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClassImpl(ClasspathManager.java:430)
   at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:413)
   at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:189)
   at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java:340)
   at org.eclipse.osgi.framework.internal.core.BundleLoader.findClassInternal(BundleLoader.java:408)
   at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:369)
   at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:357)
   at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:83)
   at java.lang.ClassLoader.loadClass(Unknown Source)
   at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass(BundleLoader.java:289)
   at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:227)
   at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1269)
   at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:160)
   at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:788)
   at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)
   at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:51)
   at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:165)
   at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
   at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
   at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
   at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
   at java.lang.reflect.Method.invoke(Unknown Source)
   at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:508)
   at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447)
   at org.eclipse.equinox.launcher.Main.run(Main.java:1173)
   at org.eclipse.equinox.launcher.Main.main(Main.java:1148)



[Eric Clayberg]

A UnsupportedClassVersionError exception is a standard Java exception that indicates that you compiled the class with a newer JDK than the one you are trying to run it with.

Launch the class with the same or newer JDK than the one you compiled with and it should be fine.

[maoyang]

But my Enviroment only install one JDK which version is 1.5.0, I didn't understand why Eclipse throw this error message , I suspected whether RCP developer's produced plugin library using different JDK compiled class

[maoyang]

I change the Launch JRE version to same as my Eclipse's JDK version , but the problem still exist

[Eric Clayberg]

I change the Launch JRE version to same as my Eclipse's JDK version , but the problem still exist

Recompile the class with that same JDK version.

If you are running the class with the same JDK verison you compiled it with, you will not have that exception.

[maoyang]

I fixed this problem by way of modifying the JRE association in the plugin configuration , thanks for your answer

[Eric Clayberg]

I fixed this problem by way of modifying the JRE association in the plugin configuration , thanks for your answer

That would do it.