IDEA Super practical use tips share (long)

preface

Good work is good work

He must sharpen his weapon first

Recently, I was invited by the department to give new recruits unified IDEA training. I found that although many new recruits use IDEA in daily development, they still do not use many useful skills. They only use some basic functions, which is quite a waste of IDEA, an excellent IDE. At the same time, after this sharing, I also learned some new use skills, so take this opportunity to share. I hope I can help some people.

IntelliJ IDEA 2018.2.2 (Ultimate Edition)

Overview of Knowledge:

Efficient configuration
Essential Shortcuts for Daily Use (★★)
- To find the
- Jump to switch
- Coding related
- Code Reading Related
- Version management related
Related to coding efficiency (★★)
- File code template
- Live code templates
- other
Code debugging source read related (★★★)
- View mode
- Code debugging
- .
The plug-in side
- Plug-in installation and use
- The plugin is recommended
reference

2019-08-09 UPDATE

[Plug-in recommendation] Added picture description, added plug-in content. Reading is friendlier.

Efficient configuration

1. The code prompt is case insensitive

Settings -> Editor -> General -> Code Completion

(For earlier versions, set the Case Sensitive Completion to None.)

2. Automatic package guide function and related optimization function

Settings -> Editor -> General -> Auto Import

3. CTRL + Scroll wheel to resize the window display

Settings -> Editor -> General -> Change font size (Zoom) with Ctrl+Mouse wheel

Once selected, you can adjust the font size of the editor window using CTRL+ scroll wheel

4. TAB displays multiple lines

This varies from person to person, some people like to just cancel all tabs and use shortcuts, but I have a big screen, so I like to show all tabs.

Window -> Editor Tabs -> Tabs Placement, uncheck the Show Tabs In Single Row option.

The effect is as follows:

5. Line numbers are displayed in the code editing area

Settings -> Editor -> General -> Appearance check Show Line Numbers

6…

Essential Shortcuts for Daily Use (★★)

To find the

shortcuts	introduce
Ctrl + F	Perform a text lookup in the current file
Ctrl + R	Text replacement in the current file
Shift + Ctrl + F	Do a text lookup in the project
Shift + Ctrl + R	Text replacement in the project
Shift + Shift	Quick search
Ctrl + N	Look for the class
Ctrl + Shift + N	Find files
Ctrl + Shift + Alt + N	Look up symbol (looks up a method name)

Jump to switch

shortcuts	introduce
Ctrl + E	Recent documents
Ctrl + Tab	Switch files
Ctrl + Alt + ←/→	Jump to the historical cursor
Alt + ←/→ Arrow key	Switch the son TAB
Ctrl + G	Go to the specified line number

Coding related

shortcuts	introduce
Ctrl + W	Rapid selected
(Shift + Ctrl) + Alt + J	Quickly select the same text
Ctrl + C/Ctrl + X/Ctrl + D	Quick copy or cut
Select Tab/Shift + Tab for multiple lines	tab
Ctrl + Y	Delete the entire line
Scroll to variable/method/class	Quick access to the definition of a variable/method/class
Shift + Hit Tab	Quickly close TAB
Ctrl + Z 、Ctrl + Shift + Z	Regret medicine, withdraw/cancel withdraw
Ctrl + Shift + enter	Automatic closure, code completion
Alt + enter	IntelliJ IDEA provides a quick fix option based on the cursor’s location, and the prompt results vary depending on the cursor’s location
Alt + write/left	Method quick jump
F2	Skip to the next highlighted error or warning location
Alt + Insert	Code is generated automatically, such as generating object set/get methods, constructors, toString(), etc
Ctrl + Shift + L	Formatting code
Shift + F6	Quickly change the method name, variable name, file name, class name, etc
Ctrl + F6	Quickly modify method signatures

Code Reading Related

shortcuts	introduce
Ctrl + P	Method parameter prompt display
Ctrl + Shift + i	You can pop up another window in the current class
Alt + F7	You can list where variables are used
Cursor in subclass interface name, Ctrl + U	Skip to the superclass interface
Alt + F1 + 1， esc
(Shift) + Ctrl + +/-	Code block folding
Ctrl + Shift + ←/→	Move the window divider
Ctrl + (Alt) + B	Jump method definition/implementation
Ctrl + H	Class hierarchy
Ctrl + F12	Show Members displays Members quickly

Version management related

shortcuts	introduce
Ctrl + D	Show Diff
(Shift) + F7	(top) Next modification

For more shortcuts, see this article github.com/judasn/Inte…

For MAC OS shortcuts, see this article github.com/judasn/Inte…

Related to coding efficiency (★★)

File code template

Settings -> Editor -> File and Code Template

Here you can see all of IDEA’s built-in file code templates. When you select a file to generate, the specified code file will be generated according to the template.

In addition, you can set the file header here.

After setting, the effect is as follows

Live code templates

IDEA provides powerful real-time code template functionality, and has many built-in templates. For example, when you type sout or PSVM, it quickly automatically generates system.out.println (); Public static void main(String[] args) {}

These Templates can be seen in Settings -> Editor -> Live Templates. Users can become familiar with the relevant code template according to their own usage habits.