Eclipse 不再可以自动导入 java 类
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Eclipse no longer can auto import java Classes
提问by greedybuddha
A few days ago my eclipse stopped being able to auto import classes. So usually when I have a class I'm using, like BufferedReader, that I need to import I simply hit ctrl+shift+Oand the imports magically appear. But now, basic imports like List or Scanner just sit there all squiggly and red. I have the 1.6JRE included as part of my project, and when I manually import them they will then work.
几天前，我的 Eclipse 无法自动导入类。所以通常当我有一个我正在使用的类时，比如 BufferedReader，我需要导入我只需点击ctrl+ shift+O并且导入会神奇地出现。但是现在，像 List 或 Scanner 这样的基本导入只是坐在那里，全部呈波浪状和红色。我将 1.6JRE 作为我项目的一部分包含在内，当我手动导入它们时，它们就会起作用。
This is a huge annoyance and time sink now. I'm open to any suggestions to fix the problem.
现在这是一个巨大的烦恼和时间。我愿意接受任何解决问题的建议。
回答by Jim Garrison
I have seen this behavior before. Sometimes just closing and reopening Eclipse resolves it. Sometimes I have had to recreate the project from the source, which can be painful if you have a lot of dependencies and you're not using Maven. You should also do a File/Refresh at the top level to make sure you're in sync with the filesystem
我以前见过这种行为。有时只需关闭并重新打开 Eclipse 即可解决。有时我不得不从源代码重新创建项目，如果您有很多依赖项并且您没有使用 Maven，这可能会很痛苦。您还应该在顶层执行 File/Refresh 以确保您与文件系统同步
回答by Juned Ahsan
Try restoring the default options in 'Windows > Preferences > Java > Editor > Content Assist > Advanced'.
If it does not work, try to create a new workspace and it may solve your problem
尝试恢复“Windows > Preferences > Java > Editor > Content Assist > Advanced”中的默认选项。
如果它不起作用，请尝试创建一个新的工作区，它可能会解决您的问题
Hope it helps!
希望能帮助到你！
回答by Jag
Try cleaning your project. I fixed mine by cleaning the project.
尝试清理您的项目。我通过清理项目来修复我的。
回答by hshin
In my case, cleaning just a project didn't fix but clean all project did.
就我而言，只清理一个项目并没有解决问题，但清理所有项目都解决了。
