victorrentea / intellij-tips

#IntelliJ Tricks by Victor Rentea, Software Crafter and Trainer

Me

• Doing workshops for companies throughout the world. https://victorrentea.ro

• 17 years of java, 9 years of trainings and consultancy

• Founder of the 2nd largest Software Crafter Community on Meetup.com (5K members): Join us 👉 https://victorrentea.ro/community

Hi, DevTernity !

First day driving ...

Exploratory Refactoring

Typing

• Autocompletion: person.firstName > person.fn > p.fn
• Boilerplate: toString
• Type-aware / snake-completion: MaritalStatus
• Postfix Completion: .sout .log .assertThat
• Live Templates: boot, logs
• TAB completion
• Statics (CTRL-SPACE x 2): ctm

Wrapping

• Finish Statement (CTRL-SHIFT-ENTER :: ⇧⌘Enter)
  • if, method, class
  • method call: ofNullable(
  • Wrap generics: Optional<
• Surround with (CTRL-ALT-T :: ⌥⌘T): if, try
• Embrace Selection: while text is selected, press any of: {"'`<([

Smart Selecting

• Multi-cursor
  • Token-based❤️ (ALT-J :: ^G) -- MovieType .html
  • ALT-drag -- .feature
  • ALT-SHIFT + click, click
• Expand/Contract selection

👑 Quick Fix (aka Inspections)

(ALT-ENTER :: ⌥ ⏎):

• Define Variable for expression
• Define new type/method
• Delete dead code
• Syntax-Tree analysis: see Boolean Logic
• Run inspection on entire project -- String.valueOf
• and 500+ more 😊=> almost all are disabled by default

FP Support

• ALT-Enter on .stream <-> for
• Skip writing ".stream()"
• Autocomplete after directly after ::
• Collecting: ctl, cs, cj

Code inspection / Surviving Legacy

• Quick Definition (Ctrl-Shift-I :: ⌥ Space)
• Current Parameter (Ctrl-P)
• Type of current expression (Ctrl-Shift-P)
• Call hierarchy (CTRL-ALT-H :: ^⌥H)
• Recent Files (CTRL-E :: ⌘E)
• Recent Places/Changes (CTRL-SHIFT-E)
• Bookmark (F11 :: F3)
• Collapse / Fold (CTRL-. :: ⌘.)

Refactoring

• Introduce Parameter, Functional Parameter, and Parameter Object -- Parameters.java

• Add param from inside / from outside w/ ALT-ENTER

• Extract Method (+ Auto-Parameterize) -- ExtractMethod.java

• Combo: Extract over & Inline inner

• Combo: Extract & Move/Convert to Instance

• Extract / Inline / Encapsulate Field -- Fields.java

• Extract explanatory variable (w or w/o preselecting)

• Extract / Inline Interface

Next Steps

• Become a Shortcuts Ninja 🥷: install "Key Promoter X" plugin

• Practice all the moves yourself (pause-play this)

• More Inspections: Download my (opinionated) inspections list (search Aggressive_Refactoring.xml on https://victorrentea.ro)

• In-house workshop your company won't ever forget
  mailto:[e-mail]

• Join my Community of Software Crafters (>5000 members) for monthly live webinars and hot🔥 debates