Does Java have naive timestamp?

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As we figured out in previous question long timestamp in java implies Unix timestamp:

long ts = 1362156863140L

But is there naive timestamp in Java? Or class which considers long timestamp in constructor as unaware of timezone?

The terminology you're using is interesting. A "timestamp" by most definitions is a unique point in time, and thus must be related to UTC - either by being exactly based on UTC, or having a fixed offset from UTC. Thus a "naive timestamp" is somewhat of a contradiction.

However, there is indeed a class that represents a date and a time without a time zone, which is LocalDateTime. It is part of the java.time API introduced as JSR-310 with Java 8.

You can use LocalDateTime.ofEpochSecond to create one from a numeric timestamp. If your timestamp is milliseconds-based, then you can do some division and modulo to split it into separate seconds and nanoseconds parameters. You will also need to pass it a UTC offset, so it knows how you want to interpret the incoming value.

How can I get the current date and time in UTC or GMT in Java , The precision of a Timestamp object is calculated to be either: Also, the hashCode method uses the underlying java.util. Throws: IllegalArgumentException - if the given argument does not have the format yyyy-[​m]m-[d]d hh:mm:ss[.f]  When you assign a string value to a DATE, TIME, or TIMESTAMP target, the IBM Data Server Driver for JDBC and SQLJ uses Java facilities to convert the string value to a java.sql.Date, java.sql.Time, or java.sql.Timestamp value. If a string representation of a date, time, or timestamp value does not correspond to a real date or time, Java adjusts the value to a real date or time value.

Timestamp (Java Platform SE 8 ), This is how the apache/avro for java implements timestamp logical type. And I have done the similar implementation in the apache/avro for  Notice that, in addition to being a “time zone naive” timestamp, the ‘aware’ value will now differ when converting to an epoch offset. Spark does the conversion by first converting to the session time zone (or system local time zone if session time zones isn’t set) and then localizes to remove the time zone information.

Since 1.8, Java has a Date/Time API, with all the native date and time functions you might need..

Please check URL below for introduction and many examples: http://www.oracle.com/technetwork/articles/java/jf14-date-time-2125367.html

timestamp logicalType return naive datatime objects · Issue #171 , `tz-naive timestamps <#timezone-naive-timestamps>`__ Timestamps whose timezone is implicit have the following format: ``Class LocalDateTime`` <https://​docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime. The Timestamp.equals (Object) method never returns true when passed an object that isn't an instance of java.sql.Timestamp , because the nanos component of a date is unknown. As a result, the Timestamp.equals (Object) method is not symmetric with respect to the java.util.Date.equals (Object) method.

ARROW-1425: [Python] Document Arrow timestamps, and interops , As we can see in the output, the Timestamp.tz_localize() function has converted the given Timestamp to a naive Timestmap. Example #2: Use Timestamp. Obviously, I lost the time. Yes but Timestamp class contains the nano second part which java.util.Date doesn't handle it. Obviously, I lost the time. When you convert from timestamp to date, time will not be lost. the problem might be when you get date from database it might truncate time.

Python, We implement the algorithms by Java and all experiments are conducted on a PC with Due to privacy issue, there is no timestamp information for each HTTP We do have some experiments in which the naive approach can not work due to  Java Convert Date to Timestamp. We can convert Date to Timestamp in java using constructor of java.sql.Timestamp class. The constructor of Timestamp class receives long value as an argument. So you need to convert date into long value using getTime() method of java.util.Date class.

Advances in Knowledge Discovery and Data Mining: 11th Pacific-Asia , A naive object does not contain enough information to unambiguously locate itself Return the local date corresponding to the POSIX timestamp, such as is  Why does Java Web Start always reload JAR files from IIS server? If a timestamp of the file on the IIS server is in the future IIS returns current-time as last-modified time. This makes Java Web Start to reload the JARs since time-stamp is always newer.

Comments
  • Since 1.8 LocalTime has been available. docs.oracle.com/javase/9/docs/api/java/time/LocalTime.html
  • isn't java.util.Date enough for you?
  • SonarLint says that java.util.Date with some other thing is obsolete in JDK8
  • @Michal Is util.Date enough for anyone?
  • What is a "naive timestamp"?
  • This Answer is somewhat vague and general. Stack Overflow is designed for laser-focused specific solutions. If the Question precludes giving a specific Answer, the Question should be closed as "unclear" or "too broad",