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bdkosher/java_concrete_v_interface.txt

Created May 9, 2020 01:02
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java_concrete_v_interface.txt
When concrete classes are preferrable to interfaces
String vs. CharSequence
- better relays immutability?
- so widespread that it can be an inconvenience to accept a CharSequence and have to do something with it, like pass to another 3rd party library method
Exception vs. Throwable
- error details object in REST application, don't want people to attempt to create these if there's an Error
LocalDate vs. ChronoLocalDate
"Most applications should declare method signatures, fields and variables as LocalDate, not this interface."
StringBuilder/Writeable vs. Appendable
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