`ZoneId.of()` should be passed a valid timezone identifierJAVA-E1092

java.time.ZoneId.of() should not be passed invalid time zone identifier strings, as this will cause exceptions to be thrown at runtime.

ZoneId doesn't check the input string at compile-time, so it is up to the developer to ensure that the string provided is actually valid. To avoid errors, it is recommended to select from a known list of timezone identifiers, such as those provided by the ZoneId.getAvailableZoneIds() method.

Bad Practice

ZoneId zoneId = ZoneId.of("invalid/timezone");

Here, an invalid timezone string is passed to ZoneId.of(). This would cause a ZoneRulesException to be thrown.

Recommended

Use a valid timezone string.

ZoneId zoneId = ZoneId.of("America/New_York");

References

• Oracle Java 11 Javadocs - java.time.ZoneId.of()