Eclipse 启动报错-!MESSAGE Problems occurred

!SESSION 2013-07-15 13:38:59.893 -----------------------------------------------
eclipse.buildId=4.3.0.I20130605-2000
java.version=1.6.0_51
java.vendor=Apple Inc.
BootLoader constants: OS=macosx, ARCH=x86_64, WS=cocoa, NL=en_US
Framework arguments:  -product org.eclipse.epp.package.standard.product -keyring /Users/fluxtah/.eclipse_keyring -showlocation
Command-line arguments:  -os macosx -ws cocoa -arch x86_64 -product org.eclipse.epp.package.standard.product -keyring /Users/fluxtah/.eclipse_keyring -showlocation

!ENTRY org.eclipse.core.resources 2 10035 2013-07-15 13:39:03.237
!MESSAGE The workspace exited with unsaved changes in the previous session; refreshing workspace to recover changes.

!ENTRY org.eclipse.equinox.preferences 4 2 2013-07-15 13:39:04.887
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.equinox.preferences".
!STACK 0
java.lang.ExceptionInInitializerError
	at org.eclipse.jdt.ui.PreferenceConstants.initializeDefaultValues(PreferenceConstants.java:3739)
	at org.eclipse.jdt.internal.ui.JavaUIPreferenceInitializer.initializeDefaultPreferences(JavaUIPreferenceInitializer.java:38)
	at org.eclipse.core.internal.preferences.PreferenceServiceRegistryHelper$1.run(PreferenceServiceRegistryHelper.java:300)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.core.internal.preferences.PreferenceServiceRegistryHelper.runInitializer(PreferenceServiceRegistryHelper.java:303)
	at org.eclipse.core.internal.preferences.PreferenceServiceRegistryHelper.applyRuntimeDefaults(PreferenceServiceRegistryHelper.java:131)
	at org.eclipse.core.internal.preferences.PreferencesService.applyRuntimeDefaults(PreferencesService.java:368)
	at org.eclipse.core.internal.preferences.DefaultPreferences.applyRuntimeDefaults(DefaultPreferences.java:221)
	at org.eclipse.core.internal.preferences.DefaultPreferences.load(DefaultPreferences.java:274)
	at org.eclipse.core.internal.preferences.EclipsePreferences.create(EclipsePreferences.java:409)
	at org.eclipse.core.internal.preferences.EclipsePreferences.internalNode(EclipsePreferences.java:670)
	at org.eclipse.core.internal.preferences.EclipsePreferences.node(EclipsePreferences.java:812)
	at org.eclipse.core.internal.preferences.AbstractScope.getNode(AbstractScope.java:38)
	at org.eclipse.core.runtime.preferences.DefaultScope.getNode(DefaultScope.java:76)
	at org.eclipse.ui.preferences.ScopedPreferenceStore.getDefaultPreferences(ScopedPreferenceStore.java:250)
	at org.eclipse.ui.preferences.ScopedPreferenceStore.getPreferenceNodes(ScopedPreferenceStore.java:285)
	at org.eclipse.ui.preferences.ScopedPreferenceStore.internalGet(ScopedPreferenceStore.java:475)
	at org.eclipse.ui.preferences.ScopedPreferenceStore.getBoolean(ScopedPreferenceStore.java:387)
	at org.eclipse.jdt.internal.ui.preferences.MembersOrderPreferenceCache.install(MembersOrderPreferenceCache.java:61)
	at org.eclipse.jdt.internal.ui.JavaPlugin.ensurePreferenceStoreBackwardsCompatibility(JavaPlugin.java:426)
	at org.eclipse.jdt.internal.ui.JavaPlugin.start(JavaPlugin.java:373)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
	at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
	at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:300)
	at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:478)
	at org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:263)
	at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:109)
	at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:469)
	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
	at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:395)
	at org.eclipse.osgi.internal.loader.SingleSourcePackage.loadClass(SingleSourcePackage.java:35)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:461)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:421)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:412)
	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
	at org.eclipse.xtext.ui.shared.internal.Activator.isJavaEnabled(Activator.java:87)
	at org.eclipse.xtext.ui.shared.internal.Activator.initializeInjector(Activator.java:57)
	at org.eclipse.xtext.ui.shared.internal.Activator.start(Activator.java:102)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
	at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
	at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:300)
	at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:478)
解决方法如下：
Please start eclipse with -clean option. 
dos命令如下（因你的Eclipse安装文件不同而不同）：
c:\eclipse\eclipse.exe -clean
If you have a shortcut for eclipse - change the property of the Target to 
如果你有快捷方式，直接修改快捷方式的路径为如下：
C:\eclipse\eclipse.exe -clean