Java Eclipse 中的 Checkstyle 错误 - 无法实例化 Tab 字符
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Checkstyle Error in Eclipse - Could not instantiate Tab character
提问by Stefan Thyberg
Got this error today while trying to build a project with checkstyle. This works for other people in my office but I would rather not reinstall Eclipse yet again. Any idea what this error actually means?
今天在尝试使用 checkstyle 构建项目时遇到此错误。这适用于我办公室的其他人，但我宁愿不再重新安装 Eclipse。知道这个错误实际上意味着什么吗？
Errors occurred during the build.
Errors running builder 'Checkstyle Builder' on project 'myproject'.
cannot initialize module TreeWalker - Unable to instantiate TabCharacter
cannot initialize module TreeWalker - Unable to instantiate TabCharacter
cannot initialize module TreeWalker - Unable to instantiate TabCharacter
cannot initialize module TreeWalker - Unable to instantiate TabCharacter
I'm gathering that it has something to do with the tab character but not much else.
我正在收集它与制表符有关，但与其他无关。
UPDATE: Version of Eclipse is 3.5, Checkstyle is 5.0.0.200906281855-final.
更新：Eclipse 版本为 3.5，Checkstyle 为 5.0.0.200906281855-final。
(Java is jdk 1.6.0_10)
（Java 是 jdk 1.6.0_10）
采纳答案by VonC
As mentioned in this bug, Checkstyle Plugin version 5.0.0.200906281855:
正如这个 bug 中提到的，Checkstyle 插件版本 5.0.0.200906281855：
Release notes of Checkstyle 5state that some of the modules and checks we are using are not backwards compatible.
E.g. the moduleTabCharacterdoes not occur in v5 any more(was replaced byFileTabCharacter), hence can't work.
The checkFileLengthdoes not require a syntax tree, hence is not any longer under parentTreeWalker.
Checkstyle 5 的发行说明指出，我们使用的某些模块和检查不向后兼容。
例如，该模块TabCharacter不再出现在 v5 中（被替换为FileTabCharacter），因此无法工作。
检查FileLength不需要语法树，因此不再在 parent 下TreeWalker。
That means your issue could be with an automatic update of the Checkstyle plugin in your eclipse configuration.
这意味着您的问题可能与 eclipse 配置中 Checkstyle 插件的自动更新有关。
回答by childno?.de
"Same" problem will occur, if you use a checkstyle configuration with self defined cs plugin classes and your plugin.jar is not in your eclipse/plugin path.
如果您使用带有自定义 cs 插件类的 checkstyle 配置并且您的 plugin.jar 不在您的 eclipse/plugin 路径中，则会出现“相同”问题。
So in this case error will just say: Hey dude: can't find your classes, please give it to me ;)
所以在这种情况下，错误只会说：嘿伙计：找不到你的课程，请给我;)
