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  1. import java.time.ZoneId;
  2. import java.util.Arrays;
  3. import java.util.Set;
  4.  
  5. public class Main {
  6. 	public static void main(String[] args) {
  7. 		String[] arr = { "America/New_York", "GMT", "UTC", "UCT", "GMT+01:00", "UTC+01:00", "ABC" };
  8.  
  9. 		// Alternatively
  10. 		Set<String> allZones = ZoneId.getAvailableZoneIds();
  11. 		Arrays.stream(arr).forEach(s -> System.out.println(allZones.contains(s) ? s : ("Unknown time-zone ID: " + s)));
  12. 	}
  13. }
  14.  
Success #stdin #stdout 0.12s 53172KB
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stdin
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Standard input is empty
stdout
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America/New_York
GMT
UTC
UCT
Unknown time-zone ID: GMT+01:00
Unknown time-zone ID: UTC+01:00
Unknown time-zone ID: ABC
https://ideone.com/R0zHAq
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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