[JAVA] Personally recommended Intellij IDEA initial settings (updated from time to time)

I will expose the settings of Intellij IDEA that I personally recommend.

Play around with Preferences

How to open the settings dialog

--For Windows or Linux Select File>Settings ... --For MacOS ʻIntelliJ IDEA> Select Preferences ...`

The following settings are made in this dialog

Make changes in Git visible at a glance

By default, files that have changed in Git are displayed in color. (↓ The changed file is blue. Subtly.)

With this setting, the parent directory of the changed file will also be displayed in color.

Setting method:

Version Control Check Show directories with changed descendants

Automatically download and import dependent libraries defined in Maven / Gradle

It automatically downloads the dependent libraries defined in Maven and Gradle's dependencies and makes them ready for use.

For Maven

Build, Execution, Deployment > Build Tools > Maven > Importing Check ʻImport Maven project automatically`

For Gradle

Build, Execution, Deployment > Build Tools > Gradle ʻCheck Use auto-import`

Automatically perform import organization

Set to automatically add necessary import statements when editing Java class

Setting method:

Editor > General > Auto Import Check ʻAdd unambiguous imports on the fly Check ʻOptimize imports on the fly

Prevent the cord from collapsing

Intellij folds and hides import statements etc. by default

Since it is troublesome to open the folds one by one due to personal preference, I set it to display without folding.

Setting method:

Editor > General > Code Folding Uncheck all the Collapse by default: checkboxes

Enclose the selected part when you enter " " "or" { "with the text selected

If you do this setting, For example, if you enter " with text selected like ↓ ... The selection will be surrounded by " . It's convenient.

Setting method:

Editor > General > Smart Keys Check Surround selection on typing quote or brace

SQL dialect settings (* MySQL is assumed here)

If you select ʻUse MySQL` when it appears like this, Intellij will recognize it as MySQL SQL and will do completion, formatting, syntax error display, etc.

It is troublesome to select one file at a time, so the method to set for the entire project is ↓. Preferences > Languages & Frameworks > SQL Dialects Select "MySQL" for Global SQL Dialects or Project SQL Dialects

Automatically organize imports and apply formatter when saving Java files

When developing as a team, it is not good that there is a difference due to indentation etc., so I think it is better to use a formatter without asking questions.

1. Install the Save Actions plugin
2. Set ʻOther Settings> Save Actions` as ↓

Increase allocated memory (heap size)

Increase the heap size to make Intellij work lighter.

Setting method:

1. Select Help> ʻEdit Custom VM Options ...`
2. If the file ʻidea.vmoptionsdoes not exist, you will be asked if you want to create it, so selectCreate`.
3. A file like ↓ is created and displayed.
4. Change the value of Xmx (maximum heap size). (In addition, if you also increase Xms (minimum heap size), startup may be a little faster)

Example:

-Xms256m
-Xmx1500m

Other recommended plugins

• BrowseWordAtCaret
• String Manipulation
• Maven Helper
• Rainbow Brackets
• GitToolBox -Reveal In Finder (* for Mac OS)