Eclipse：应用程序无法启动

Question

我正在研究eclipse上的java项目。当我按Run As Eclipse Application时，它曾经工作。现在它突然停止了工作：

自上次工作以来我唯一做的就是卸载和安装不同的java和jdk版本。目前我在C:\Program Files\Java中有这3个：

• jre7
• jre1.8.0_20
• jdk1.8.0_20

我不知道第二个是什么。我在"Programs and Features"找不到它。

在path变量中我有：

C:\Program Files\Java\jre7\bin;C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v6.5\bin;C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v6.5\libnvvp;C:\Python27\Lib\site-packages\PyQt4;C:\Python27;C:\Python27\Scripts;C:\OpenSSH\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files\nodejs\;C:\Downloads\Android\adt-bundle-windows-x86_64-20140702\sdk\tools

当我在错误消息上点击"Yes, in an editor"时，这是一些日志：

!SESSION 2014-08-25 17:21:53.071 -----------------------------------------------
eclipse.buildId=M20090917-0800
java.version=1.7.0_67
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Framework arguments:  -product org.eclipse.sdk.ide
Command-line arguments:  -product org.eclipse.sdk.ide -data C:\Dropbox\University\Semester 5\Project\workspace/../runtime-EclipseApplication -dev file:C:/Dropbox/University/Semester 5/Project/workspace/.metadata/.plugins/org.eclipse.pde.core/Eclipse Application/dev.properties -os win32 -ws win32 -arch x86_64

This is a continuation of log file C:\Dropbox\University\Semester 5\Project\runtime-EclipseApplication\.metadata\.bak_0.log
Created Time: 2014-08-25 17:21:56.118

!ENTRY org.eclipse.osgi 4 0 2014-08-25 17:21:56.118
!MESSAGE Application error
!STACK 1
java.lang.NoClassDefFoundError: org/eclipse/core/resources/IContainer
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:114)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368)
...
Caused by: org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter$TerminatingClassNotFoundException: An error occurred while automatically activating bundle org.eclipse.core.resources (3814).
    at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:125)
    at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:449)
    at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:211)
    at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:381)
    at org.eclipse.osgi.internal.loader.SingleSourcePackage.loadClass(SingleSourcePackage.java:33)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:454)
...
Caused by: org.osgi.framework.BundleException: Exception in org.eclipse.core.resources.ResourcesPlugin.start() of bundle org.eclipse.core.resources.
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:806)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:755)
...
Caused by: java.lang.StackOverflowError
    at java.util.HashMap.init(Unknown Source)
    at java.util.HashMap.<init>(Unknown Source)
    at java.util.HashMap.<init>(Unknown Source)
    at java.util.HashSet.<init>(Unknown Source)
    at org.eclipse.core.internal.resources.MarkerTypeDefinitionCache.computeSuperTypes(MarkerTypeDefinitionCache.java:88)
    at org.eclipse.core.internal.resources.MarkerTypeDefinitionCache.computeSuperTypes(MarkerTypeDefinitionCache.java:94)
...
!ENTRY org.eclipse.jdt.core 2 0 2014-08-28 10:19:14.693
!MESSAGE The Java indexing could not index C:/Program Files/Java/jre7/lib/ext/nashorn.jar|jdk/nashorn/internal/objects/NativeArray$Constructor.class. This .class file doesn't follow the class file format specification. Please report this issue against the .class file vendor
...

为什么会这样？

我应该发布其他信息以便确定问题吗？

修改

我在项目中发现了以下警告：

The JRE container on the classpath is not a perfect match to the 'JavaSE-1.6' execution environment MANIFEST.MF /JDTCommentsV2/META-INF line 11 Plug-in Problem

对应MANIFEST.MF中的这一行：

Bundle-RequiredExecutionEnvironment: JavaSE-1.6

修改

我修正了：右击 - ＆gt;快速修复

但现在又出现了另一个错误：

Build path specifies execution environment JavaSE-1.6. There are no JREs installed in the workspace that are strictly compatible with this environment.

解决方案here和here建议在项目中选择Workspace default JRE - ＆gt;属性 - ＆gt;添加库 - ＆gt; JRE系统库。这带回了：

The JRE container on the classpath is not a perfect match to the 'JavaSE-1.6' execution environment MANIFEST.MF /JDTCommentsV2/META-INF line 11 Plug-in Problem

修改

我更改了workspace位置（将其放在桌面上），现在可以正常工作了。但我需要原始路径（因为它是Dropbox中的共享文件夹...）。有什么想法吗？

Answer 1

Bundle-RequiredExecutionEnviornment属性指示需要Java 1.6。 OSGi文档暗示，具有此属性的bundle不一定支持更高版本的Java，但我没有特别发现。错误消息指向需要Java 1.6环境来运行此捆绑包（jar文件，无论如何），并且您的路径没有一个，只有一个晚于1.6的路径。我会安装1.6，消除其他的，确保classpath和eclipse选择的JRE / JDK指向1.6，刷新eclipse中的所有项目，然后重启你的机器。