eclipse IDEA：“将语句分配给新的局部变量”？
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IDEA: "Assign statement to new local variable"?
提问by Chris Lercher
As a long time Eclipse user, I'm playing around a little bit with IntelliJ IDEA 10. I can't seem to find out how to perform an "Assign statement to new local variable" code completion.
作为 Eclipse 的长期用户，我正在尝试使用 IntelliJ IDEA 10。我似乎无法找到如何执行“将语句分配给新的局部变量”代码完成。
Feature explanation:
功能说明：
I type something like
我输入类似
new BufferedOutputStream(out)
and then hit Cmd (or Ctrl)+1and enter, and Eclipse changes the line into:
然后点击Cmd (or Ctrl)+1并回车，Eclipse 将这一行更改为：
BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(out);
At the same time, I can type over "bufferedOutputStream" immediately to rename it (or select from the options "bufferedOutputStream", "outputStream" and "stream" from a dropdown).
同时，我可以立即键入“bufferedOutputStream”以重命名它（或从下拉列表中选择“bufferedOutputStream”、“outputStream”和“stream”选项）。
I use this feature for absolutely every assignment, and it's an enormous time saver - this must be available in IDEA, too - but where is it hidden?
我绝对在每个作业中都使用此功能，它可以节省大量时间 - IDEA 中也必须提供此功能 - 但它隐藏在哪里？
回答by CrazyCoder
Refactor | Introduce Variable(Ctrl+Alt+Von Windows). Note that you don't need to select the text if it's the only text in the current line. Then you can change the variable name in-line just like you've described and press Enterto complete editing.
重构 | 引入变量（Windows 上的Ctrl+ Alt+ V）。请注意，如果该文本是当前行中的唯一文本，则无需选择该文本。然后您可以像您描述的那样在线更改变量名称，然后按Enter完成编辑。
Another way is to use the Postfix Completion:
另一种方法是使用Postfix Completion：
Type .var(or just .vto select it from the list) and confirm it with Enter.
键入.var（或只是.v从列表中选择它）并用 确认Enter。
回答by G?k?er G?kdal
As CrazyCoder mentions you can use Ctrl+Alt+V. Also instead of selecting the expression, clicking into somewhere in your expression and using Ctrl+Wto expand scope is very useful while using introduce refactorings. Extract refactorings are:
正如 CrazyCoder 提到的，您可以使用Ctrl+ Alt+ V。此外，在使用引入重构时，不是选择表达式，而是单击表达式中的某个位置并使用Ctrl+W扩展范围非常有用。提取重构是：
- Extract variable: Ctrl+Alt+V
- Extract field: Ctrl+Alt+F
- Extract method: Ctrl+Alt+M
- Extract parameter: Ctrl+Alt+P
- Extract constant: Ctrl+Alt+C
- 提取变量：Ctrl+ Alt+V
- 提取场：Ctrl+ Alt+F
- 提取方法：Ctrl+ Alt+M
- 提取参数：Ctrl+ Alt+P
- 提取常数：Ctrl+ Alt+C
Also, Idea is a polygot editor so you can use these extract refactorings for other file types like js or html also (not all refactorings work in all file types but Ctrl+Wworks mostly).
此外，Idea 是一个 polygot 编辑器，因此您也可以将这些提取重构用于其他文件类型，例如 js 或 html（并非所有重构都适用于所有文件类型，但Ctrl+W主要适用）。
There are more extract refactorings which do not have shortcuts which you can access from Refactor|Extract menu (both menu bar and context menu). To quick access all refactorings you can use Ctrl+Alt+Shift+Tfor a popup menu.
还有更多没有快捷方式的提取重构，您可以从 Refactor|Extract 菜单（菜单栏和上下文菜单）访问它们。要快速访问所有重构，您可以使用Ctrl+ Alt+ Shift+T作为弹出菜单。
As a last word, I highly encourage you using "Tip of the Day" (Help|Tip of the Day). It is a fast way to learn many helpful features of Idea.
最后，我强烈建议您使用“今日提示”（Help|Tip of the Day）。这是学习 Idea 的许多有用功能的快速方法。
回答by dogbane
It's not as nice as Eclipse, but you can try the following:
它不如 Eclipse，但您可以尝试以下操作：
new BufferedOutputStream(out)
- Select the expression above, either with your mouse (or by using Ctrl+W).
- Then hit Ctrl+Alt+Vto Introduce a Variableor (Ctrl+Alt+Fto Introduce a Field)
- 使用鼠标（或使用Ctrl+ W）选择上面的表达式。
- 然后打Ctrl+ Alt+V到介绍一个变量或（Ctrl+ Alt+F到介绍一个字段）
