blocks|key|5231343|text|不是一个解决方案，而是一个只适用于当前编辑器和当前会话的临时解决方案：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|5231344|只需在行号所在的位置上单击鼠标右键(+right+)，就会看到一个小菜单。|5231345|然后，选择"Show+Line+Numbers“选项。|5231346|​|5231347|📷|atomic|5231348|5231349|但是，请注意，这只适用于每个文件。好好享受吧。|5231350|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/714cbc4cc337be10126d5406fd724813.png|imageAlt^0|S|2|0|J|7|0|0|0|0|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|13|8|@$9|14|A|15|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|16|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|17|8|@]|D|@]|E|$]]|$1|L|3|M|5|N|7|18|8|@]|D|@$9|19|A|1A|1|1B]]|E|$]]|$1|O|3|K|5|6|7|1C|8|@]|D|@]|E|$]]|$1|P|3|Q|5|6|7|1D|8|@]|D|@]|E|$]]|$1|R|3|-4|5|6|7|1E|8|@]|D|@]|E|$]]]|S|$T|$5|U|V|W|E|$X|Y|Z|-4]]]]

NOT a solution, rather a TEMPORARY solution which only works only for the current editor and current session:

Simply right click on the place where the line-numbers should be, and there you'll see a small menu.

then, mark the "Show Line Numbers" option.

<img src="https://i.stack.imgur.com/tqMgd.png" alt="enter image description here">

Please note that this only works on a per-file basis, however. Enjoy.

blocks|key|1704489|text|在Intellij+13中，布局已更改，设置按钮只能在文件->设置中找到，而不能在工具栏中找到，从那里您可以执行相同的步骤:编辑器->外观->显示行号，或在设置搜索输入中搜索行号。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1704490|📷|atomic|offset|length|1704491|​|1704492|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/a5cc7558129c56f9280101204502e7e6.png|imageAlt^0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|S|8|@]|9|@$E|T|F|U|1|V]]|A|$]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|J|$K|$5|L|M|N|A|$O|P|Q|-4]]]]

In Intellij 13 the layout has changed, the Settings button can only be found in File -> Settings and not in the toolbars, and from there you follow the same steps: Editor -> Appearance -> Show line numbers, or search for Line numbers in the Settings search input.<img src="https://i.stack.imgur.com/sfNsG.png" alt="Intellij Settings search for line numbers">

blocks|key|3815684|text|Android+Studio1.3.2及更高版本、IntelliJ+15和|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3815685|全局配置|3815686|文件->设置->编辑器->常规->外观->显示行号|3815687|​|3815688|📷|atomic|3815689|3815690|当前编辑器配置|3815691|3815692|第一种方式:查看->活动编辑器->显示行号(此选项仅在您先前单击活动编辑器的文件时可用)|3815693|第二种方法:右键单击项目结构和活动编辑器之间的小区域(即，您可以设置断点的区域)+->显示行号。|3815694|3815695|3815696|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/e6fbeb692bce8d8301fb164182f14b3a.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/1095640e58d219f80cdaff1c8fd49196.gif^0|0|11|0|0|4|0|0|0|0|1|0|0|0|0|7|0|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|19|8|@$9|1A|A|1B|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1C|8|@$9|1D|A|1E|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1F|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|1G|8|@]|D|@]|E|$]]|$1|L|3|M|5|N|7|1H|8|@]|D|@$9|1I|A|1J|1|1K]]|E|$]]|$1|O|3|-4|5|6|7|1L|8|@]|D|@]|E|$]]|$1|P|3|Q|5|6|7|1M|8|@$9|1N|A|1O|B|C]]|D|@]|E|$]]|$1|R|3|K|5|6|7|1P|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|1Q|8|@]|D|@]|E|$]]|$1|U|3|V|5|6|7|1R|8|@]|D|@]|E|$]]|$1|W|3|M|5|N|7|1S|8|@]|D|@$9|1T|A|1U|1|1V]]|E|$]]|$1|X|3|K|5|6|7|1W|8|@]|D|@]|E|$]]|$1|Y|3|-4|5|6|7|1X|8|@]|D|@]|E|$]]]|Z|$10|$5|11|12|13|E|$14|15|16|-4]]|17|$5|11|12|13|E|$14|18|16|-4]]]]

<h1>Android Studio 1.3.2 and on, IntelliJ 15 and on</h1>

Global configuration

File -> Settings -> Editor -> General -> Appearance -> Show line numbers

<a href="https://i.stack.imgur.com/VeB78.png"><img src="https://i.stack.imgur.com/VeB78.png" alt="enter image description here"></a>
<hr/>
Current editor configuration

First way: View -> Active Editor -> Show Line Numbers (this option will only be available if you previously have clicked into a file of the active editor)

Second way: Right click on the small area between the project's structure and the active editor (that is, the one that you can set breakpoints) -> Show Line Numbers.
<a href="https://i.stack.imgur.com/YGkgw.gif"><img src="https://i.stack.imgur.com/YGkgw.gif" alt="enter image description here"></a>

blocks|key|1474562|text|适用于InteliJ+IDEA+11.0及更高版本的|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1474563|转到设置窗口中的文件+-->+设置编辑器+-->+外观|offset|length|style|BOLD|1474564|和勾选“显示行号”复选框。|1474565|​|1474566|📷|atomic|1474567|1474568|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/1ce0cb166913124ef59132770db4eb30.jpeg|imageAlt^0|0|8|2|F|5|P|2|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@$D|10|E|11|F|G]|$D|12|E|13|F|G]|$D|14|E|15|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|16|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|17|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|18|8|@]|9|@$D|19|E|1A|1|1B]]|A|$]]|$1|O|3|K|5|6|7|1C|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|Q|$R|$5|S|T|U|A|$V|W|X|-4]]]]

For InteliJ IDEA 11.0 and above 
Goto File --> Settings in the Settings window Editor --> Appearance 
and tick Show line numbers check box.

<img src="https://i.stack.imgur.com/07g1k.jpg" alt="enter image description here">

blocks|key|1704533|text|IntelliJ+14+(Ubuntu)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1704534|请参阅：how-do-i-turn-on-line-numbers-permanently-in-intellij-14|offset|length|1704535|永久：|1704536|文件>设置>编辑器>常规>外观>显示行号|1704537|​|1704538|📷|atomic|1704539|1704540|对于当前编辑器：|1704541|视图>活动编辑器>显示行号|1704542|1704543|1704544|1704545|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/27032622/how-do-i-turn-on-line-numbers-permanently-in-intellij-14|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/ce6df1a5594e98db3255db69378c6714.png|imageAlt|2|https://ask.qcloudimg.com/http-save/yehe-900000/3981d924cc5ca60feb4da924a56cf62d.png^0|0|4|1K|0|0|0|0|0|0|1|1|0|0|0|0|0|0|1|2|0|0^^$0|@$1|2|3|4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1D|8|@]|9|@$D|1E|E|1F|1|1G]]|A|$]]|$1|F|3|G|5|6|7|1H|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1I|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1J|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|1K|8|@]|9|@$D|1L|E|1M|1|1N]]|A|$]]|$1|O|3|K|5|6|7|1O|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1P|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|T|3|K|5|6|7|1R|8|@]|9|@]|A|$]]|$1|U|3|M|5|N|7|1S|8|@]|9|@$D|1T|E|1U|1|1V]]|A|$]]|$1|V|3|K|5|6|7|1W|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1X|8|@]|9|@]|A|$]]]|X|$Y|$5|Z|10|11|A|$12|13]]|14|$5|15|10|16|A|$17|18|19|-4]]|1A|$5|15|10|16|A|$17|1B|19|-4]]]]

IntelliJ 14 (Ubuntu): 

See: <a href="https://stackoverflow.com/questions/27032622/how-do-i-turn-on-line-numbers-permanently-in-intellij-14">how-do-i-turn-on-line-numbers-permanently-in-intellij-14</a>

Permanently:

File > Settings > Editor > General > Appearance > show line numbers

<img src="https://i.stack.imgur.com/ArGQ9.png" alt="Editor">

For current Editor:

View > Active Editor > Show Line Numbers

<img src="https://i.stack.imgur.com/wK2Af.png" alt="Menu">

blocks|key|5231659|text|好的，在Mac14旗舰版中，使用intelliJ版本，就是这样。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5231660|5231661|+IntelliJ+Idea+>首选项>编辑器>常规>外观>显示行号|blockquote|5231662|5231663|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|J|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|K|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|L|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|M|8|@]|9|@]|A|$]]]|H|$]]

Ok in intelliJ 14 Ultimate using the Mac version this is it.

<blockquote>
 IntelliJ Idea > Preferences > Editor > General > Appearance > Show Line Numbers
</blockquote>

blocks|key|5231514|text|在MAC上的IntelliJ+12上，我很难找到它。由于某种原因，搜索不能给我指路。转到首选项，然后在IDE设置、编辑器、外观下选择‘显示行号’|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5231515|​|5231516|📷|atomic|offset|length|5231517|5231518|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/6a3ecab4304095a5c180523998b051f3.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q|R|-4]]]]

On IntelliJ 12 on MAC OSX, I had a hard time finding it. The search wouldn't show me the way for some reason. Go to Preferences and under IDE Settings, Editor, Appearance and select 'Show line numbers'

<img src="https://i.stack.imgur.com/Hpc01.png" alt="enter image description here">

blocks|key|3815478|text|Android+Studio|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3815479|转到Android+Studio+=>+Preferences+=>+Editor+=>+常规+=>+外观+=>设置选中“显示行号”|offset|length|style|BOLD|3815480|​|3815481|📷|atomic|3815482|3815483|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/358f2338f7619662c96c18c1536ef3b6.png|imageAlt^0|0|2|E|K|B|Z|6|19|2|1F|2|1P|4|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@$D|Y|E|Z|F|G]|$D|10|E|11|F|G]|$D|12|E|13|F|G]|$D|14|E|15|F|G]|$D|16|E|17|F|G]|$D|18|E|19|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|1A|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|1B|8|@]|9|@$D|1C|E|1D|1|1E]]|A|$]]|$1|M|3|I|5|6|7|1F|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|U|V|-4]]]]

Android Studio

Go to Android Studio => Preferences => Editor => General => Appearance => set Checked "Show line numbers"

<img src="https://i.stack.imgur.com/MiEaP.png" alt="enter image description here">

blocks|key|1475054|text|我刚刚在安装了IdeaVim插件的情况下实现了这一点，即使我设置了Show+Line+Numbers，它仍然会继续隐藏它们。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1475055|(值得拍打额头的)解决方案是：|1475056|:set+nu|code-block|syntax|javascript|1475057|entityMap^0|X|H|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|S|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

I just hit this with IdeaVim plugin installed, where even if I set <code>Show Line Numbers</code>, it continued to revert to hiding them.

The (forehead-slapping-worthy) solution was:

<pre><code>:set nu
</code></pre>

blocks|key|5231321|text|对于9.0.4|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5231322|文件>设置|5231323|在树视图组中|5231324|-IDE设置|5231325|单击编辑器%2B|5231326|选择外观...就在那里。|5231327|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|P|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|Q|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|S|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|M|$]]

For 9.0.4 

File > Settings

In the tree view group

------------IDE Settings ---------

Click the Editor [+]

Select Appearance... Its there.

blocks|key|1474873|text|第一种方法：转到查看=>活动编辑器=>显示行号|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1474874|​|1474875|📷|atomic|1474876|1474877|Show转到Android+Studio+=>偏好设置=>+Editor=>外观设置选中“显示行号”|1474878|1474879|1474880|1474881|1474882|1474883|1474884|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/a33dd8e4c5d577a52c8aee21d060833c.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/1185e37ddb369ba79d9f8df2b6b36997.png|2|https://ask.qcloudimg.com/http-save/yehe-900000/f2b89084604488389c15c1de013ffe44.png^0|0|6|0|0|0|1|0|0|0|0|4|0|0|0|1|1|0|0|0|0|1|2|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@$9|17|A|18|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|19|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|1A|8|@]|D|@$9|1B|A|1C|1|1D]]|E|$]]|$1|K|3|G|5|6|7|1E|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|1F|8|@$9|1G|A|1H|B|C]]|D|@]|E|$]]|$1|N|3|G|5|6|7|1I|8|@]|D|@]|E|$]]|$1|O|3|I|5|J|7|1J|8|@]|D|@$9|1K|A|1L|1|1M]]|E|$]]|$1|P|3|G|5|6|7|1N|8|@]|D|@]|E|$]]|$1|Q|3|G|5|6|7|1O|8|@]|D|@]|E|$]]|$1|R|3|I|5|J|7|1P|8|@]|D|@$9|1Q|A|1R|1|1S]]|E|$]]|$1|S|3|G|5|6|7|1T|8|@]|D|@]|E|$]]|$1|T|3|-4|5|6|7|1U|8|@]|D|@]|E|$]]]|U|$V|$5|W|X|Y|E|$Z|10|11|-4]]|12|$5|W|X|Y|E|$Z|13|11|-4]]|14|$5|W|X|Y|E|$Z|15|11|-4]]]]

1st way: Go to View => Active Editor => show line numbers

<img src="https://i.stack.imgur.com/SP6TG.png" alt="enter image description here">

2nd way Go to Android Studio => Preferences => Editor=> Appearance => set Checked "Show Line Numbers"

<img src="https://i.stack.imgur.com/3WCdD.png" alt="enter image description here">

<img src="https://i.stack.imgur.com/i9T1u.png" alt="enter image description here">

blocks|key|3814958|text|在Mac+Intellij+12.1.2上，没有文件设置：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3814959|在"File“的左侧有一个application-name菜单项，带有一个"preferences”菜单项：|3814960|​|3814961|📷|atomic|offset|length|3814962|3814963|其中是Windows+Intellij显示的“设置”对话框。|3814964|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/be5f844accd2ff495da10e0084fbf26e.png|imageAlt^0|0|0|0|0|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|Z|8|@]|9|@$I|10|J|11|1|12]]|A|$]]|$1|K|3|E|5|6|7|13|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|14|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|U|V|-4]]]]

On Mac Intellij 12.1.2 there is no File-Settings:

There is an application-name menu item to the left of "File" with a "preferences" menu item:

<img src="https://i.stack.imgur.com/veG7t.png" alt="Choosing &quot;Preferences&quot; on the Mac.">

and within that is the "Settings" dialog shown by the Windows Intellij.

blocks|key|1470584|text|在IntelliJ+14中，它再次在菜单中移动了一些。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1470585|现在我们把它放在Editor+->+General+->+Appearance下面|offset|length|style|CODE|1470586|​|1470587|📷|atomic|1470588|1470589|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/a04dca2b773eb172179aea799ba5c243.png|imageAlt^0|0|8|V|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|10|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|11|8|@]|9|@$D|12|E|13|1|14]]|A|$]]|$1|M|3|I|5|6|7|15|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|U|V|-4]]]]

In IntelliJ 14 it has moved again somewhat down the menu. 

Now we have it unter <code>Editor -&gt; General -&gt; Appearance</code>

<img src="https://i.stack.imgur.com/1qjBW.png" alt="enter image description here">

blocks|key|1475101|text|这只是Android+Studio+1.5.1在Windows上的一个更新：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1475102|转至文件+->+设置+->关注图片|1475103|📷|atomic|1475104|​|1475105|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/01fe7706bb24bdd42ff9d04bd61bda7f.jpeg|imageAlt^0|3|K|0|2|2|8|2|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|13|8|@]|D|@$9|14|A|15|1|16]]|E|$]]|$1|K|3|L|5|6|7|17|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T|U|-4]]]]

Just an update for Android Studio 1.5.1 on Windows:

Go to File -> Settings -> follow picture
<a href="https://i.stack.imgur.com/mXdJ7.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/mXdJ7.jpg" alt="enter image description here"></a>

blocks|key|3815852|text|在IntelliJ+IDEA+2016.1.2上|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|3815853|转到设置>编辑器>常规>外观，然后选中显示行号选项|3815854|​|3815855|📷|atomic|3815856|3815857|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/602c730a1e6dc1a1907a6ff97cb9b91b.png|imageAlt^0|1|M|1|M|0|2|C|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@$9|Y|A|Z|B|C]|$9|10|A|11|B|D]]|E|@]|F|$]]|$1|G|3|H|5|6|7|12|8|@$9|13|A|14|B|C]]|E|@]|F|$]]|$1|I|3|J|5|6|7|15|8|@]|E|@]|F|$]]|$1|K|3|L|5|M|7|16|8|@]|E|@$9|17|A|18|1|19]]|F|$]]|$1|N|3|J|5|6|7|1A|8|@]|E|@]|F|$]]|$1|O|3|-4|5|6|7|1B|8|@]|E|@]|F|$]]]|P|$Q|$5|R|S|T|F|$U|V|W|-4]]]]

On <code>IntelliJ IDEA 2016.1.2</code>

Go to Settings > Editor > General > Appearance 
then check the Show Line number option

<a href="https://i.stack.imgur.com/gjMvm.png" rel="noreferrer"><img src="https://i.stack.imgur.com/gjMvm.png" alt="enter image description here"></a>

blocks|key|5232647|text|IntelliJ+2019社区版默认为行号。如果要显示或隐藏行号，请转到以下设置以更改外观。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5232648|转至→文件→设置→编辑器→常规→外观→选中显示行号|5232649|​|5232650|📷|atomic|offset|length|5232651|5232652|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/4a09e70f194a2cf31176133d6dee04cc.png|imageAlt^0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@$I|Y|J|Z|1|10]]|A|$]]|$1|K|3|E|5|6|7|11|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S|T|-4]]]]

IntelliJ 2019 community edition has line number by default. If you want to show or hide line numbers, go to the following settings to change the appearance.

go to → File → Setting → Editor → General → Appearance → [Check] Show line numbers

<a href="https://i.stack.imgur.com/1iZww.png" rel="noreferrer"><img src="https://i.stack.imgur.com/1iZww.png" alt="show_line_numbers"></a>

blocks|key|3816178|text|对于IntelliJ+20.1或更高版本，在Mac上：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3816179|IntelliJ+IDEA+->编辑器->常规->外观->显示行号|offset|length|style|BOLD|3816180|要注意的一点：始终查找Editor|CODE|3816181|​|3816182|📷|atomic|3816183|3816184|对于快捷方式：|3816185|⌘%2B⇧%2BA+(command+%2B+shift+%2B+A)|3816186|类型|3816187|3816188|3816189|然后单击弹出窗口打开Show+line+numbers，您就可以开始了。|3816190|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/2ecf61a7d6d1d63851adbd24c504ea9c.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/5bafc4884b950c07dab611ab9e22dfc4.png^0|0|0|X|0|0|7|B|6|0|0|0|1|0|0|0|0|0|0|0|1|1|0|0|A|H|0^^$0|@$1|2|3|4|5|6|7|1B|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1C|8|@$D|1D|E|1E|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|1F|8|@$D|1G|E|1H|F|G]|$D|1I|E|1J|F|J]]|9|@]|A|$]]|$1|K|3|L|5|6|7|1K|8|@]|9|@]|A|$]]|$1|M|3|N|5|O|7|1L|8|@]|9|@$D|1M|E|1N|1|1O]]|A|$]]|$1|P|3|L|5|6|7|1P|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|1R|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|1S|8|@]|9|@]|A|$]]|$1|W|3|N|5|O|7|1T|8|@]|9|@$D|1U|E|1V|1|1W]]|A|$]]|$1|X|3|L|5|6|7|1X|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|1Y|8|@$D|1Z|E|20|F|J]]|9|@]|A|$]]|$1|10|3|-4|5|6|7|21|8|@]|9|@]|A|$]]]|11|$12|$5|13|14|15|A|$16|17|18|-4]]|19|$5|13|14|15|A|$16|1A|18|-4]]]]

For IntelliJ 20.1 or above, on Mac OSX:

IntelliJ IDEA -> Editor -> General -> Appearance -> Show line numbers

Point to be noted: Always look for <code>Editor</code>

<a href="https://i.stack.imgur.com/nESrm.png" rel="noreferrer"><img src="https://i.stack.imgur.com/nESrm.png" alt="enter image description here"></a>

For shortcut:

⌘ + ⇧ + A (command + shift + A)

type <a href="https://i.stack.imgur.com/G9ILU.png" rel="noreferrer"><img src="https://i.stack.imgur.com/G9ILU.png" alt="enter image description here"></a>

and click on the pop up to turn on <code>Show line numbers</code> and you are good to go.

How can I permanently enable line numbers in IntelliJ IDEA?

How can I permanently enable line numbers in IntelliJ?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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