Wat? That’s Possible in Java?
summary
Live demos show concrete surprises: Integer cache via reflection lets code rewrite cached wrapper values (newer JDKs require module opens), a sneaky throw generic cast raises checked exceptions without declaring them, receiver parameters let methods accept an explicit this-like first argument, and mutating a String’s internal value array via reflection changes supposedly final constants. Also covers preview features (top-level main, pattern matching edge cases where int instance-of float fails due to float encoding) and odd brace/semicolon hacks that only work by formatting.
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chapters (9)
- 0:00Introduction
- 0:56Python-like Java syntax
- 3:43Receiver parameters and maps
- 6:16Inlining pitfalls
- 8:16Advanced instanceof usage
- 11:22Integer cache manipulation
- 14:35Sneaky checked exceptions
- 16:12String reflection tricks
- 18:29Array syntax and conclusion
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