IntelliJ

• Official Cheatsheet
• Official IntelliJ Documentation

To change the Keymap Theme (eg. Visual Studio, VSCode, etc.): shiftshift → select "Keymap" → select "name of some theme"

Setup

VSCode Keymaps

• Install the VSCode Keymaps Plugin.
• Disable the
  • emoji autocomplete popup ctrlshifte, otherwise the VSCode file explorer shortcut does not work
  • unicode autocomplete popup ctrlshiftu, otherwise the VSCode "Run" shortcut does not work
  • run ibus-setup, there you can remove these shortcuts under "Emoji" → "Keyboard Shortcuts", unix.stackexchange

warning

Updating the VSCode Keymaps Plugin resets it.

Quick Documentation Popup

• The "Quick Documentation" popup will not show the documentation for classes, methods, etc, unless you point IntelliJ to the location of the documentation.

• Java documentation: You can either use an online documentation or download and use a documentation locally (offline).

  • You can get the URLs of the java documentation for each java version here: Links to JDK documentation.
  • Then, in IntelliJ, press ctrlshiftalts to open the "Project Structure" menu.
  • Under "Platform Settings" → "SDKs" → "Documentation Paths" press alts (or click on the plus symbol) to add your chosen documentation URL.
  • Then, when you click on "Ok" the documentation will be shown in the quick documentation popup windows.

• Documentation of Libraries: Usually, you have to do this for each java library separately.

  • if you use Maven you can install documentations by opening the "Maven" panel (click on the "Maven" symbol on the right side of the IntelliJ editor or use shiftshift → search for "Maven") → "Download Sources and/or Documentation" → "Download Documentation"

• sources:

  • stackoverflow: Java
  • stackoverflow: Maven

"Maven Build Scripts Found" popup

When you see the "Maven Build Scripts Found" popup, click on the "Load ..." button inside this popup to set up Maven for the current project, otherwise the "Maven" button in the right sidebar of IntelliJ will not be visible and building the project using ctrlshiftF10, ctrlshiftF5 will not be possible.

Alternatively, right-click on the pom.xml file in the file explorer and click on the last item in the context menu to set up Maven for the current project.

• related:
  • stackoverflow: maven-build-scripts-found-intellij-what-are-the-build-scripts-where-are-the

Best Practices

Live Templates

Use IntelliJ IDEA Live Templates whenever possible. People often upload their Live Templates on Github and other places, so you can download and use them. By using those Live Templates you can avoid typing errors and speed up your coding.

Settings

VSCode	Visual Studio	description
ctrl,	ctrlalts	settings

Search Keymaps

VSCode	Visual Studio	description
ctrl, → "Keymap"	.	under "Keymap" you can click on the search symbol beside the search bar "Find Actions by Shortcut" to search a shortcut by pressing the shortcut you want to find
shiftshift	shiftshift	find all ...
ctrlshiftp	ctrlshifta	find action ...
ctrlk ctrlr	.	Shortcuts Cheatsheet PDF

Tabs

VSCode	Visual Studio	description
ctrlw	ctrlF4	Close Tab
ctrltab	ctrltab	switch Tab ("Switcher")

View

VSCode	Visual Studio	description
ctrlshift´ (custom)	ctrlalt1	toggle terminal
esc	esc	focus the editor
none	alt0	build window
ctrlshifte	alt1	focus file explorer, focus project window
alt3	alt3	find window
ctrlshiftu	alt4	run window
ctrlshiftg	alt9	Git (to show warnings and errors that occurred while committing open the "Code Analysis" pane via "find action" (ctrlshifta) → type "messages")
ctrlshiftm	.	problems window

Run

VSCode	Visual Studio	description
ctrlshiftF10	ctrlF5	run application
ctrl;ctrll (english), ctrlshiftF5	ctrlshiftF5	rerun application
shiftF5	shiftF5	stop application

File Explorer

VSCode	Visual Studio	description
altinsert	altinsert	while on a folder or file: opens the "New" menu, where you can eg. create a new class file
F2	shiftF6	rename file

Open Files

VSCode	Visual Studio	description
shiftshift	shiftshift	find all ...
ctrle	.	Recent Files
ctrlp	.	Go to file

Workspaces (aka Projects)

• Click on the current project's name on the top left of the IntelliJ window. There you can select another Workspace/Project.
• or: Click on the hamburger button on the top left of the IntelliJ window. Select "Recent Projects" → "Manage Projects".
• or: ctrlo → type in the path of your project (faster than clicking in the file tree)

Editor

Writing

VSCode	Visual Studio	description
ctrlshifti (custom)	.	format code (doc: If you don't select a code fragment, IntelliJ IDEA will reformat the whole file.)
ctrle	.	delete to word start
ctrlx	ctrlx	cut line
ctrli	.	extend line selection (in combination with altshiftdown this is useful to copy and paste multiple lines of code)
altshiftright	.	extend selection (useful to select words, select everything inside parentheses, copy and paste blocks of code)
altshiftdown	ctrld	duplicate line
altinsert	altinsert	"Generate", eg. a constructor
ctrl.	altenter	show context actions (Quick-fixes for highlighted errors and warnings, intention actions for improving and optimizing your code)

Jumps

VSCode	Visual Studio	description
altF8, altshiftF8	F2, shiftF2	jump to next or previous highlighted problem (error, warning, info)

Code Info

VSCode	Visual Studio	description
ctrlshiftspace	ctrlshiftspace	inside function parentheses: parameter info (shows function parameter names and types)
altF12	altF12	definition
ctrlkctrli	.	documentation