eclipse运行出现Usage: javaw [-options] class [args...]...

最近在eclipse运行时出现了,

 

 

Usage: javaw [-options] class [args...]
       (to execute a class)
or  javaw [-options] -jar jarfile [args...]
       (to execute a jar file)
where options include:
-d32      use a 32-bit data model if available
-d64      use a 64-bit data model if available
-server   to select the "server" VM
-hotspot      is a synonym for the "server" VM  [deprecated]
              The default VM is server.

-cp <class search path of directories and zip/jar files>
-classpath <class search path of directories and zip/jar files>
              A ; separated list of directories, JAR archives,
              and ZIP archives to search for class files.
-D<name>=<value>
              set a system property
-verbose[:class|gc|jni]
              enable verbose output
-version      print product version and exit
-version:<value>
              require the specified version to run
-showversion  print product version and continue
-jre-restrict-search | -no-jre-restrict-search
              include/exclude user private JREs in the version search
-? -help      print this help message
-X            print help on non-standard options
-ea[:<packagename>...|:<classname>]
-enableassertions[:<packagename>...|:<classname>]
              enable assertions with specified granularity
-da[:<packagename>...|:<classname>]
-disableassertions[:<packagename>...|:<classname>]
              disable assertions with specified granularity
-esa | -enablesystemassertions
              enable system assertions
-dsa | -disablesystemassertions
              disable system assertions
-agentlib:<libname>[=<options>]
              load native agent library <libname>, e.g. -agentlib:hprof
              see also, -agentlib:jdwp=help and -agentlib:hprof=help
-agentpath:<pathname>[=<options>]
              load native agent library by full pathname
-javaagent:<jarpath>[=<options>]
              load Java programming language agent, see java.lang.instrument
-splash:<imagepath>
              show splash screen with specified image
最终找到的原因是,Eclipse语言包有一个bug。
https://bugs.eclipse.org/bugs/show_bug.cgi?id=352203
这个bug导致类路径过长(类路径多了一长串javaelementlabels_comma_string=,...)。
正如博客园这位说的一样(http://www.cnblogs.com/aigongsi/archive/2012/04/11/2442774.html),
类路径过长就会出现Usage: javaw [-options] class [args...]...
在stackoverflow上也有人提这样的问题,是他(http://stackoverflow.com/questions/9862037/trouble-compiling-any-java-code-in-eclipse)
提示我在解决类路径问题后可能需要重启电脑。确实如此。

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