How to see JavaDoc in IntelliJ IDEA?

Quick access to JavaDoc

Getting instant access to documentation empowers you to code with greater understanding. There are several ways to access JavaDocs in IntelliJ IDEA.

Keyboard Command: Quick Documentation

Press Ctrl+Q (Cmd+Q for macOS) to display an immediate overview of the documentation.

// Code is like a joke, if you have to explain it, it's bad. 
// So let's make our code self-explanatory with JavaDocs.
// Try this funny key.
String whiteRabbit = "I'm late!";
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Auto JavaDoc Popups: Be spoiled

Want the IDE to spoon-feed you JavaDocs as you type? Enable automatic JavaDoc popups:

Preferences > Editor > General > Code Completion > Tick Autopopup documentation box.

// You know, it's cool being a programmer.
// It's kind of like being a wizard 
// But... in IntelliJ IDEA, with auto JavaDoc, it's more like being Dumbledore.
int magicSpell = 42;
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On Mouse Move: Stealthy Lookup

Hover the mouse pointer over a code element to sneak a peek at the JavaDoc:

Preferences > Editor > General > Tick Show quick documentation on mouse move box.

// Why did the developer hover his mouse? 
// To summon the magic tooltip of wisdom! 
boolean thisIsEpic = true;
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