Scala for Java developers
summary
Claim: switching parts of a Java codebase to Scala eliminates most nullpointerexceptions — one presenter counts NPEs on one hand after a year — by using Option instead, immutable case classes and the scala repl for quick prototyping. Shows concrete patterns: copy for immutable updates, pattern matching and for-comprehensions instead of nested flatMaps, implicits for execution contexts and codecs, and recommends Play plus futures/tasks for concurrency. Demonstrates Java interoperability and short, working code examples.
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chapters (11)
- 0:00Introduction
- 1:14Why use Scala
- 7:34Object orientation
- 11:12Scala options
- 12:29Scala case classes
- 15:18Scala pattern matching
- 22:59Immutability
- 28:22Flatten
- 32:20Multiple parameters
- 36:23Conclusion
- 37:53Questions
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