IntelliJ IDEA introduction, installation, configuration optimization and shortcut key list

1. Introduction

The full name of IDEA is IntelliJ IDEA, which is an integrated development environment for the Java programming language. IntelliJ is recognized as the best Java development tool in the industry, especially in intelligent code assistants, automatic code prompts, refactoring, JavaEE support, various version tools (git, svn, etc.), JUnit, CVS integration, code analysis, innovative The functions in GUI design and other aspects can be said to be extraordinary.

2. Installation

1. System requirements

64-bit Windows 10 1809 and later, or Windows Server 2019 and later;
Minimum 2 GB available RAM, 8 GB total system RAM recommended;
3.5 GB hard drive space, SSD recommended;
Minimum screen resolution 1024x768;

2. Download address

https://www.jetbrains.com/idea/download/

3. Installation instructions

Run the IntelliJ IDEA-2023.2.2.exe file to start the installation wizard
Follow all steps suggested by the wizard. Please pay special attention to the corresponding installation options

4. Installation tutorial

1). Go to JetBrains official website to download the corresponding version of IDEA

2). Double-click the installation package to enter the IDEA welcome interface and click "Next"

3). Select the installation location of IDEA and ensure there is enough space.

4). Select the installation configuration, make selections as needed, and click "Next"

5). Select the start menu and leave it as default, then click "Install" and wait patiently for the installation process.

6). Installation completed! Displaying this interface means that IDEA has been successfully installed, just click "Finish"

7). Activate IDEA

3. Configuration

1. JDK configuration

2. Maven configuration

3. Install plug-ins

4. Shortcut keys

1. Build/Compile

Ctrl + F9: Build project

After executing this command, IntelliJ IDEA will compile all classes in the project and output the compilation results to the out directory. IntelliJ IDEA supports incremental builds and will only compile modified classes based on the last build.

Ctrl + Shift + F9: Recompile the current class

Open the class to be compiled in IntelliJ IDEA, and executing this command will compile the current class.

`2. 文本编辑`

Ctrl + X:Cut

Cut the selected text, or the current line if it is not selected.

Ctrl + C:copy

Copies the selected text, or the current line if it is not selected.

Ctrl + V: Paste
Ctrl + Alt + Shift + V: Paste as plain text
Ctrl + Shift + V: Paste from history selection

Select content to paste from the history cut-and-paste version.

Ctrl + D:Copy row

Copy the line where the cursor is.

Ctrl + Shift + C:Copy file path

Copy the path of the selected file.

Ctrl + Alt + Shift + C:Copy reference

Copy the path to the package, or the name of the class.

Ctrl + S: Save all
Ctrl + Z: Undo

Undo the previous step.

Ctrl + Shift + Z: Redo

Restore the undo contents of the previous step.

Tab: indent
Shift + Tabl: Cancel indentation

Ctrl + Alt + I: Automatically indent lines

Automatically indent to standard position.

Shift + Enter: Start a new line

Starts a new line regardless of whether the cursor is at the end of the line.

Ctrl + Alt + Enter: Start a new line before the current line

Ctrl + Y: Delete row

Delete the current row.

Ctrl + Shift + U: Case conversion

Ctrl + Alt + Shift + Insert:Create temporary files

Various types of temporary files can be created that are not saved to disk.

Shift + F4: Open in new window

Open the current file in a new window.

3. Cursor operation

Ctrl + Left: Move one word to the left

Ctrl + Right: Move one word to the right

Home: Move to the beginning of the line
End: move to the end of the line

Ctrl + Shift + M:Move to braces

Press the shortcut key multiple times to switch between the left and right braces.

Ctrl + [: Move to the beginning of the code block
Ctrl + ]: Move to the end of the code block

Alt + Down: Next method
Alt + Up: Previous method

Ctrl + PageUp: Move to the top of the page
Ctrl + PageDown: Move to the bottom of the page

PageUp: Page up
PageDown: Page down

Ctrl + Home: Move to the beginning of the file
Ctrl + End: Move to the end of the file

4. Text selection

Ctrl + A: Select all
Shift + Left: Select left
Shift + Right: Select right

Ctrl + Shift + Left: Select a word to the left
Ctrl + Shift + Right: Select a word to the right

Shift + Home: Select left to the beginning of the line
Shift + End: Select right to the end of the line

Shift + Up: Select upward
Shift + Down: Select down

Ctrl + Shift + [: Select to the beginning of the code block
Ctrl + Shift + ]: Select to the end of the code block

Ctrl + Shift + PageUp: Select to the top of the page
Ctrl + Shift + PageDown: Select to the bottom of the page

Shift + PageUp: Page up selection
Shift + PageDown: Page down selection

Ctrl + Shift + Home: Select to file switch
Ctrl + Shift + End: Select to the end of the file

Ctrl + W: Expand selection
Ctrl + Shift + W: shrink selection

5. Code folding

Ctrl + NumPad+: Expand code block
Ctrl + NumPad-: Collapse code block

Ctrl + Alt + NumPad+: Recursive expansion
Ctrl + Alt + NumPad-: recursive folding

Ctrl + Shift + NumPad+: Expand all
Ctrl + Shift + NumPad-: Collapse all

6. Multiple carets and range selections

Alt + Shift + Click:Add/remove caret

Alt + Shift + Insert: Switch column selection mode

Double-clickCtrl + Up: Clone the caret upward

Double-clickCtrl + Down: Clone the caret downwards

Alt + Shift + G: Adds a caret to each line in the selection

Alt + J: Select where the unit will appear next
Alt + Shift + J: Cancel the last selection

Ctrl + Alt + Shift + J: Select all occurrences

Alt + Shift + Middle-Click:Create a rectangular selection

Alt + Click:Drag to create a rectangular selection area

Ctrl + Alt + Shift + Click:Drag to create multiple rectangular selection areas

7. Auxiliary coding

Alt + Enter:Show suggested actions

Ctrl + Space: Code completion

Ctrl + Shift + Space: Type matching code completion

Ctrl + Alt + Space: Second code completion

Ctrl + Shift + Enter:Complete the current statement

Ctrl + Alt + L:Formatting code

Ctrl + P: Parameter information reminder

Ctrl + Q:Quick Documentation

Ctrl + Shift + Up: Move statements up
Ctrl + Shift + Down: Move statements down

Ctrl + Alt + Shift + Left: Move elements to the left
Ctrl + Alt + Shift + Right: Move element to the right

Alt + Shift + Up: Move the queue up
Alt + Shift + Down: Move the queue down

Ctrl + /: Add line comments

Ctrl + Shift + /:Add block comment

Alt + Insert:Production statement

8. Contextual Navigation

Alt + Down: Jump to the next method
Alt + Up: Jump to the previous method

Ctrl + G: Jump to the specified line

Ctrl + Tab:Switch active file

Alt + F1: Select the location of the file

Ctrl + E: recent files

Ctrl + Shift + Backspace: Return to the last editing position

Ctrl + Alt + Left: Back
Ctrl + Alt + Right: Forward

Ctrl + Alt + Down: Next event
Ctrl + Alt + Up: Previous event

Alt + Right: Select the next tab
Alt + Left: Select the next tab

F11:Switch anonymous bookmarks

Ctrl + Shift + [digit]: Switch bookmarks with numbers

Ctrl + F11: Use auxiliary words to switch bookmarks

Shift + F11:Show all bookmarks

Ctrl + [digit]: Jump to bookmarks with numbers

Alt + 7:Show structure window

Alt + 3: Display the search window

9. Search operation

Double-clickShift: Find all

Ctrl + F: Find characters (current file)

F3: Find next
Shift + F3: Find previous

Ctrl + R: Replace character (current file)

Ctrl + Shift + F: Find characters (all files)

Ctrl + Shift + R:Replace character (all files)

Ctrl + F3: Jump to the next position of the word under the cursor

Ctrl + Shift + N: Find files and jump

Ctrl + F12:Open file structure

Ctrl + Alt + Shift + N: Find symbols (variables, methods, etc.)

Ctrl + Shift + A: Find action

10. Symbolic Navigation

Alt + F7: Find usage
Ctrl + B: Jump to the statement

Ctrl + Shift + B: Jump to the declaration class

Ctrl + Alt + F7: Show usage
Ctrl + U: jump to super method
Ctrl + Alt + B: Jump to the implementation method

11. Official website documents

https://www.jetbrains.com/help/idea/reference-keymap-win-default.html

5. Conclusion

This article provides a detailed explanation of the introduction, installation, configuration optimization and shortcut keys of IntelliJ IDEA. The shortcut key definitions refer to the official website documentation and network content of IntelliJ IDEA, and the shortcut keys of IntelliJ IDEA (Windows version) are listed. On this basis, animation demonstrations are provided for more than 90% of the shortcut keys, so that the operation effects can be intuitively seen. Shortcut keys All shortcuts can be found and modified in "Settings | Keymap".