# IntelliJ IDEA - Get Started
###### tags: `IntelliJ`
[TOC]

# Basic
## Show Context Actions
ALT + ENTER

## Find Actions
You can either find files or actions you want to do.

CTRL + SHIFT + A || double shift


### Example
Type about + enter

## Search Everywhere
First we have to press **CTRL + SHIFT + A || 2x SHIFT** to open searcher.
If we want to check up in all files, such as inside libraries, then we have to change **Project Files** filter to **All Places**.

>[color=lightblue]

**Note:** Press **Ctrl + Q** to preview available documentation.

## Word Selection
By using **CTRL + W** we can select the word under the caret. And Pressing **CTRL + W** we can select even more than before.

>Amount of press times, to select:
>1. Word under caret.
>2. The whole String.
>3. Whole String with quotes.
>4. Whole Parameter.
>5. Whole call.[color=orange]

If we want to deduct selection back to previous selection, we can use **CTRL + SHIFT + W**.

**Example:**
>[color=orange]

## Comment line (註解)
Use **CTRL + /** to comment/uncomment the line you want, and by selecting several lines at same time, you can just comment them out with the same method.

## Duplicate/Delete Line
**CTRL + D** to dupplicate a line. The caret can be anywhere in the line to duplicate it.

**CTRL + Y** to delete a line.

## Move Code Fragments
### Line Movement
**ALT + SHIFT + ↑** > Move line up by one line
**ALT + SHIFT + ↓** > Move line down by one line

### Method Movement
The caret must be on the method header to make this movement.
**CTRL + SHIFT + ↑** > Move method up
**CTRL + SHIFT + ↓** > Move method down

## Collapse/Expand regions
### Single region
**CTRL + MINUS** > Collapse the region the caret is.
**CTRL + PLUS** > Expand the region the caret is.

### All regions in the file
**CTRL + SHIFT + MINUS** > Collapse all regions.
**CTRL + SHIFT + PLUS** > Expand all regions.

## Wrap
We can wrap lines with **CTRL + ALT + T** and unwrap by using **CTRL + SHIFT + DEL**.

## Multiple Selections
By putting the caret at the near end of the symbol(red caret on img), we can use **ALT + J** to select the symbol, and as we keep using the same method, we can select the next occurance. And we can deselect one by one by using **ALT + SHIFT + J**.

**Note:**
* Select all occurences by using **CTRL + ALT + SHIFT + J**.
* When all selected, we can change the symbol all at once.