如何在 eclipse ant 编辑器中启用撤消？
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How do I enable undo in eclipse ant editor?
提问by Ludwig Weinzierl
Undo is not working for me in ant editor in eclipse. When I press Ctrl-Z nothing happens.
在 Eclipse 的 ant 编辑器中，撤消对我不起作用。当我按下 Ctrl-Z 时，什么也没有发生。
Is it possible to enable undo somehow or is this a bug?
是否可以以某种方式启用撤消或者这是一个错误？
I am using Eclipse 3.4.2 (Ganymede) on Windows XP Professional.
我在 Windows XP Professional 上使用 Eclipse 3.4.2 (Ganymede)。
回答by VonC
Yes undo should be working perfectly in an ant editor.
For Ctrl-Zto not workcould mean:
是的，撤消应该在 ant 编辑器中完美运行。
因为Ctrl-Z不工作可能意味着：
- the shortcut has been assigned to another action (
Windows > Preferences > General > Keys) - the undo buffer size is somehow at '0' (
Windows > Preferences > General > Editors > Text Editor) - a plugin somehow 'steals' the key event for itself
- 快捷方式已分配给另一个操作 (
Windows > Preferences > General > Keys) - 撤消缓冲区大小不知何故处于“0”（
Windows > Preferences > General > Editors > Text Editor） - 一个插件以某种方式“窃取”了自己的关键事件
Try a fresh install, and check also with a latest Galileo (3.5RC2) install to see if the problem persist.
尝试全新安装，并检查最新的 Galileo (3.5RC2) 安装，看看问题是否仍然存在。
Note: zvikicomentions the existence of a known bug with ant editor in 3.4.2
注意：zvikico在 3.4.2 中提到了 ant 编辑器中存在一个已知错误
After a quick search, the following bugs might explain your situation:
经过一个快速搜索，下面的错误可能说明您的情况：
- 267780[ant editor] delete line cannot be undone after cursor has been moved
- 247434Failed to undo removal of line in Ant editor, only with 'Eclipse IDE for Java Developers', with Eclipse Classic you don't get this behavior
- 267780[ant editor] 移动光标后无法撤消删除行
- 247434无法在 Ant 编辑器中撤消删除行，仅适用于“Java 开发人员的 Eclipse IDE”，使用 Eclipse Classic 则不会出现此行为
and finally:
最后：
- 239115Undo functionality does not work anymore in the ant editor, mainly because a WTP issue, only solved in 3.5
- 239115ant 编辑器中的撤消功能不再起作用，主要是因为 WTP 问题，仅在 3.5 中解决
回答by user3201569
If the CTRL-Z (undo) does not work anymore, you might try that. It worked for me: go to Preferences -> General -> Keys and click on apply button or restore defaults button
如果 CTRL-Z（撤消）不再起作用，您可以尝试这样做。它对我有用：转到首选项 -> 常规 -> 键，然后单击应用按钮或恢复默认值按钮
回答by CodeMed
I see this post is very old, but I am adding a response for the people who find this through the search engines.
我看到这篇文章很旧，但我正在为通过搜索引擎找到这篇文章的人添加一个回复。
Ctrl-Zstopped working in eclipse for me when I made a small change in one part of my code which in turn triggered an unexpected infinite loop in a different part of my code.
Ctrl-Z当我对我的代码的一部分进行小的更改时，我停止在 eclipse 中工作，这反过来又在我的代码的不同部分触发了意外的无限循环。
- I used the windows task manager to kill the application that I had been testing when Ctrl-Zhad stopped working, and then I used
system.out.println()to identify the part of the code where the infinite loop was being triggered. - I then disabled that section of code, which in turn caused Ctrl-Zand everything else to start working again.
- I was able to finish debugging from there.
- 我使用 windows 任务管理器杀死了我一直在测试的应用程序Ctrl-Z停止工作，然后我用来
system.out.println()识别触发无限循环的代码部分。 - 然后我禁用了该部分代码，这反过来导致Ctrl-Z以及其他所有内容重新开始工作。
- 我能够从那里完成调试。
