JetBrains IntelliJ IDEA on Mac OS X

The extract constant refactoring converts a local variable into an instance variable.

⌃⇥ (Ctrl + Tab) - navigate from the project view pane to an editor pane
⌘↖︎ (Command + Home) or fn⌘← (Fn + Command + Left Arrow) or fn↑ (Fn + Up Arrow) - navigate to the top of the file (in editor)
⌥→ (Option + Right Arrow) - move forward by token while selecting
⌥⇧→ (Option + Shift + Right Arrow) - move forward by token
⌘L (Command + L) - go to line number
⌘F (Command + F) - find in file
⌘G (Command + G) - repeat the last find operation
⎋ (Escape) - dismiss "find" dialog
⌘⌥C (Command + Option + C) - open the "extract constant" dialog
⏎ (Return/Enter) - complete action

Keystrokes without explanations

⌃⇥
⌘↖︎ (or fn⌘←)
⌘L
11
⏎
hold ⌥
→
→
release ⌥
hold ⇧⌥
→
release ⇧⌥
⌘⌥F
⏎
↓

Walkthrough of steps with explanations

Open the Java source file, LongConditional.java.
If focus is not already in the editor pane for LongConditional.java, press ⌃⇥ (Ctrl + Tab) and select the editor pane for LongConditional.java.
Press ⌘↖︎ (Command + Home) or fn⌘← (Fn + Command + Left Arrow) or fn↑ (Fn + Up Arrow) to navigate to the top of the file (depends on the keyboard).
Press ⌘L (Command + L) to open the "go to line number" dialog.
Enter line number 11.
Press ⏎ (Return/Enter) to move the caret to the specified line number.
Hold ⌥ (Option) and press → (Right Arrow) twice to advance to the token, errorCount.
Hold ⇧⌥ (Shift + Option) and press → (Right Arrow) once to select the token, errorCount.
Press ⌘⌥F (Command + Option + F) to open the "extract field" dialog.
Press ⏎ (Return/Enter) to accept the defaults and complete the refactoring.
Press ↓ (Down Arrow) and the caret should land on the token, result, on the line below.
Press ⌘⌥F (Command + Option + F) to open the "extract field" dialog.
Press ⏎ (Return/Enter) to accept the defaults and complete the refactoring.

To reverse the changes:

Press ⌘Z (Command + Z) repeatedly until the changes have been reversed. Should be 30 times.

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