Switch expressions (preview 2) in Java 13.

Overview

Switch expressions (preview 2) in Java 13.

Example 

  // Java 13 feature: Switch expressions (preview 2)
// See official JDK release notes for migration details

Common Use Cases

  • Modern Java 13 development
  • Migration from older JDK versions

Pitfalls to Avoid

  • Assuming feature availability on older JDKs
  • Not checking --release compiler flag
  • Java 12 features
  • JDK release notes

Best Practices

  • Understand when to use switch expressions (preview 2) versus simpler alternatives
  • Write unit tests covering edge cases and failure paths
  • Follow Java conventions and prefer standard library APIs when available
  • Profile before optimizing — measure impact in your specific workload