Intellij IDEA: The Superior Code Editor

An internal talk @SeatGeek given by @sddamico and @rickhanlonii

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Transcript

1. Intellij Idea: The Greatest Code Editor On The Planet @rickhanlonii @sddamico
2. Learning [intellij] isn’t just important for your future; it’s important for our [company]’s future. – Barack Obama* Head of the Free World * he didn’t really say that
3. Why Intellij? Besides Rick and Stephen saying that it’s better than Sublime
4. When Your Editor Understands the Code You’re Writing… Navigation is Easier Navigate to class, method, symbol, declaration, etc. Editing is Faster Autocomplete, live templates, postfix completion, etc. Refactoring is Painless Extract methods, change method signatures, renames, etc. Testing is Simple Generate test classes, navigate to tests, Debugging is Powerful Breakpoints in code, tests, library sources, etc.
5. Navigation is Easier The abstract syntax tree makes it all better
6. Navigation • The editor is able to keep your code in memory and provide smarter navigation • Most editors have Find, Open, Jump to line, etc. to open specific classes or files, Intellij has that too • But when you have access to the AST… everything gets better • Intellij: Navigate to [class | symbol | symbol in class | line | declaration | implementation | super method | test for class | more and more ] • Key thing: camel case completion on everything: “SGTV” completes to “SeatGeekTextView”
7. Navigate to Class
8. Navigate to Symbol
9. Navigate to Symbol In Class
10. Navigate to Declaration/Implementation
11. shift + shift (I have no idea what I want)
12. Editing is Faster Contextually aware autocompletion and more!
13. Live Templates • A few characters tab out to common code • psfs = public static final String • fbc = findViewById() (with cast) • fori = new for(int i = 0; i < x; i++) {} block • sout = System.out.println() • Tons more + you can create your own! Examples:
14. Intent Actions • alt + enter • Auto-fix or perform common actions • Invert “if” condition • Select correct import • Inject language (more in a second!) • Bring variable into scope • Many more, can be expanded with plugins Examples:
15. Language injections • Declare a string contains a certain language • Gain syntax highlighting, autocomplete, etc. • JSON • XML • SQL • Any language you have installed via plugins! Examples:
16. Postfix Completion • Act like “fake” methods that autofill code • Improve speed and ease with common tasks • Creating a for loop over a collection (.for) • Making result of method call a local var (.var) • Casting a variable to another type (.cast) • More can be added by plugins! Examples:
17. Inspections • Built-in static analysis to catches problems/smells • Classes exposed beyond scope • Spelling errors (great for Stephen) • Unused methods/parameters/fields • Naming convention violations • Methods with too many parameters warnings • As with all of these, many, many more Examples:
18. AST Highlighting • Option Up / Down • Highlight increasing/decreasing scope • Highlight variable to rename • Highlight local block to extract method • Highlight method to extract method object • Highlight class to move to new location Examples:
19. Refactoring is Painless It shouldn’t be so hard and you should be doing it more
20. Method Renaming
21. Field Renaming
22. Method Signature Change
23. Implementation to Interface
24. Extract Method
25. Delegate Function
26. Testing is Simple It’s proven: in applications where writing tests is easy, test coverage is higher
27. Testing • Navigate to Test • Auto create - template class • Running test method/class/file
28. Debugging is Powerful Inspect :allthethings: while debugging
29. Debugging • Step through execution stack • See variable values next to their usages • Explore every value in entire stack call • Execute statements at position in stack
30. Plus! • The whole IDE is customizable • Themes • Plugins • Editor Tabs • Code Style • Run Configurations • Fonts/Tabs/File Headers/and more! • The IDE is open source, so if there’s a particular bug that impacts you, or a feature that you want, you can fix it/build it yourself!
31. Thanks for listening!
32. Links and More • JetBrains Official Site: jetbrains.com • CheatSheet (for keybindings): www.mediaatelier.com/CheatSheet/ • ShortcutFoo (more keybindings): www.shortcutfoo.com/app/dojos/intellij-idea-mac • Key Promoter Intellij: plugins.jetbrains.com/plugin/1003