异常现象：

打开Eclipse，出现 An internal error occurred during: "Initializing Java Tooling". java.lang.NullPointerException 错误弹框；

出现原因：

不合理的关闭eclipse才发生的错误；

解决办法：

删除程序的工作空间下的.project文件

具体路径：

workspace\.metadata\.plugins\org.eclipse.core.resources\.projects

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