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This article mainly explains the "what are the commonly used keyboard shortcuts in Intellij IDEA". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn which shortcut keys are commonly used in Intellij IDEA.

1 Smart Tip

Of course, Intelligence intelligence bears the brunt of Intellij! The basic code hint is Ctrl+Space, and you can more intelligently prompt Ctrl+Shift+Space by type information, but because Intellij always prompts automatically as we click, most of the time you don't manually type these two shortcuts (unless the prompt box disappears). Using F2 / Shift+F2 to move to the wrong code, Alt+Enter quickly fixes (that is, the Quick Fix function in Eclipse). When the smart prompt automatically completes the method name for us, we usually have to fill in the anti-parentheses and semicolons at the end of the line by ourselves. when the parentheses are nested in many layers, it will be very troublesome, then we can automatically complete the characters at the end by typing Ctrl+Shift+Enter. And not only parentheses, for example, after typing if/for, you can also automatically fill in {} curly braces.

Finally, Intellij can intelligently perceive the configuration files and classes of mainstream frameworks such as Spring and Hibernate to statically brake and intelligently scan and understand how your project is constructed and configured under the seemingly "static" appearance.

2 reconstruction

Intellij refactoring is another feature of Eclipse, which is amazingly intelligent, such as automatically checking all matches when extracting variables and extracting them into one variable at the same time. Especially after watching "refactoring-improving existing code design", the cooperation of Intellij is simply exhilarating! It is the powerful intelligence and refactoring capabilities that make the development of TDD under Intellij very smooth.

To get to the point, let's first talk about an invincible refactoring function big summary shortcut Ctrl+Shift+Alt+T, called Refactor This. Press a little complicated, but also in line with the style of Intellij, many keyboard shortcuts have to be done with both hands, unlike many of the most useful keyboard shortcuts of Eclipse can be done with one hand chic (I do not know whether it is a major advantage of Eclipse), but you will feel nothing if you have used Emacs (non-Emacs black). In addition, there are some of the most commonly used refactoring techniques, because they are so common that it is a bit inefficient to choose from the Refactor This menu every time. For example, Shift+F6 is simply to rename, and Ctrl+Alt+V is to extract variables.

3 code generation

This is similar to Eclipse, although not unique, but because of the high frequency of daily use, it is still listed at the top of the list. Fori/sout/psvm+Tab is commonly used to generate boilerplate boilerplate code such as loops, System.out, main methods, and all templates can be viewed with Ctrl+J. Alt+Insert will be mentioned later in the "Auxiliary" section. Click in the edit window to generate constructors, toString, getter/setter, override parent methods, and so on. These two techniques are so commonly used that they generate a bunch of main, System.out, and getter/setter almost every day.

In addition, Intellij IDEA 13 adds suffix automatic completion (Postfix Completion), which is more flexible and powerful than template generation. For example, to enter for (User user: users), you only need to enter user.for+Tab. For example, to type Date birthday = user.getBirthday (); just type user.getBirthday (). Var+Tab.

4 Editing

One of the great keys that have to be said in the editor is the Ctrl+W that can automatically select the code according to the syntax and the reverse Ctrl+Shift+W. In addition, Ctrl+Left/Right moves the cursor to the preceding / trailing word, Ctrl+ [/] to the antecedent / descendant code block, and these Vim-like cursor movements are also a highlight. If you add Shift to the above Ctrl+Left/Right/ [], you can select the code within the jump range. Alt+Forward/Backward moves to the front / back method. There are also some very common lines like Ctrl+Y delete lines, Ctrl+D copy lines, and Ctrl+ folding code, not to mention.

A little bit more about cursor movement, in addition to the functions already provided by Intellij itself, we can also install ideaVim or emacsIDEAs to enjoy the fast movement of Vim and the AceJump function of Emacs (awesome!) . In addition, the bookmark function of Intellij is also good, define 1-10 bookmarks with Ctrl+Shift+Num (press this set of keyboard shortcuts again to delete bookmarks), and then jump through Ctrl+Num. This avoids the hassle of using the previous / next editing position Ctrl+Left/Right to jump back and forth many times, and this shortcut key conflicts with the Windows hotkey by default (there is more Alt by default, which conflicts with Windows changing the display direction, and accidentally the display becomes explicit upside down, ah).

5 find and open

Ctrl+N/Ctrl+Shift+N like Eclipse,Intellij can open classes or resources, but Intellij is smarter, and any character we enter will be treated as a fuzzy match, saving the trouble of typing * in Eclipse. The latest version of IDEA also includes a Search Everywhere feature that allows you to search for anything in a pop-up box, including classes, resources, configuration items, methods, and so on, simply by pressing Shift+Shift.

The inheritance relationship of the class can be opened with Ctrl+H, and the jump on the inheritance level can be implemented with Ctrl+B/Ctrl+Alt+B corresponding to the parent class or parent method definition and subclass or submethod, respectively, to see all the methods of the current class using Ctrl+F12.

It's also easy to find the use of a class or method, Alt+F7. To find the location of the text, use Ctrl+F/Ctrl+Shift+F to find it in the current window or the whole project, and then move to the next match before and after F3/Shift+F3.

Another proof that Intellij is smarter is that you can type in the words you are looking for directly in any menu or display window, and Intellij will automatically filter for you.

6 other aids

With these magic keys and some auxiliary shortcuts, you can get your hands off the mouse more than 90% of the time, and focus on the keyboard as if you were performing on the piano. These humble but crucial last pieces of the puzzle are:

Command: Ctrl+Shift+A can find all Intellij commands, and each command is followed by its shortcut key. So it is not only a magic key, but also a tool to find and learn shortcuts.

New: Alt+Insert can create classes, methods, and so on.

Format code: format import list Ctrl+Alt+O, format code Ctrl+Alt+L.

Dialog switch window: Alt+Num, commonly used are 1-project structure, 3-search results, 4 hand 5-run debugging. Ctrl+Tab toggles tabs, Ctrl+E/Ctrl+Shift+E hits

Open a recently opened or edited file.

Unit test: Ctrl+Alt+T creates a unit test case.

Run: Alt+Shift+F10 runs the program, Shift+F9 starts debugging, Ctrl+F2 stops.

Debugging: F7/F8/F9 corresponds to Step into,Step over,Continue respectively.

In addition, there are some I customized, such as horizontal split screen Ctrl+ |, and some magical little functions Ctrl+Shift+V paste copied a long time ago, Alt+Shift+Insert entered column mode to select by column.

7 final list

The lineup of this list is too luxurious, and the last few places are so useful that they do not show weakness.

^ Top # 10 cut back and forth: Ctrl+Tab

^ Top # 9 choose what you want: Ctrl+W

* Top # 8 code generation: Template/Postfix + Tab

Res. Top # 7 call the shots: Ctrl+Shift+A

^ Top # 6 nowhere to hide: Shift+Shift

^ Top # 5 automatic completion: Ctrl+Shift+Enter

@ Top # 4 create everything: Alt+Insert

It's too hard to give up, let's tie for the top three!

Autonomous Top # 1 Intelligence completion: Ctrl+Shift+Space

@ Top # 1 self-repair: Alt+Enter

* Top # 1 refactoring everything: Ctrl+Shift+Alt+T

Thank you for your reading, these are the contents of "what are the commonly used shortcuts in Intellij IDEA?" after the study of this article, I believe you have a deeper understanding of what the commonly used shortcuts in Intellij IDEA have, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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