import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
 
public class Main {
	public static void main(String[] args) {
		// Change the JVM's ZoneId, ZoneId.systemDefault() with the applicable ZoneId
		// e.g. ZoneId.of("America/Los_Angeles")
		ZoneId zoneId = ZoneId.systemDefault();
 
		ZonedDateTime zdt = ZonedDateTime.now(zoneId);
		System.out.println(zdt.getHour());
 
		LocalDateTime ldt = LocalDateTime.now(zoneId);
		System.out.println(ldt.getHour());
 
		LocalTime time = LocalTime.now(zoneId);
		System.out.println(time.getHour());
	}
}

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