How to check for this Date Time Pattern if some minutes are over for Java Android

Question

I receive this Date Time pattern from Server as a string.

Sa. 07.01.2023 16:39:15

Now i want to check if 1 minute is over. Like if the gap between the current time and the time (received as a string) from server is longer than a minute.

The time zone is in Europe. Like Austria.

Answer 1

1. Parse the given date-time string into a LocalDateTime.
2. Convert the obtained LocalDateTime into a ZonedDateTime by applying a ZoneId.
3. Get the current ZonedDateTime in the applied ZoneId.
4. Finally, find the minutes between the current ZonedDateTime and the ZonedDateTime obtained from the date-time string.

Demo:

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
import java.util.Locale;

class Main {
    public static void main(String[] args) {
        String strDateTime = "Sa. 07.01.2023 16:39:15";

        DateTimeFormatter parser = DateTimeFormatter.ofPattern("EEE dd.MM.uuuu HH:mm:ss", Locale.GERMAN);

        // Note: change the ZoneId as per your requirement

        ZonedDateTime zdt = LocalDateTime.parse(strDateTime, parser)
                                         .atZone(ZoneId.of("Europe/Vienna"));
        System.out.println("Date-time received from the server: " + zdt);

        ZonedDateTime now = ZonedDateTime.now(zdt.getZone());
        System.out.println("Current date-time: " + now);

        System.out.println(ChronoUnit.MINUTES.between(zdt, now) > 1);
    }
}

Output from a sample run:

Date-time received from the server: 2023-01-07T16:39:15+01:00[Europe/Vienna]
Current date-time: 2023-01-07T17:33:04.140599+01:00[Europe/Vienna]
true

ONLINE DEMO

Learn more about the modern Date-Time API from Trail: Date Time.

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Incorporating the following valuable alternative solution suggested by Basil Bourque:

Might be more clear if you switch to Instant objects at the end. Extract an Instant from your first ZonedDateTime, and change ZonedDateTime now to Instant now.

class Main {
    public static void main(String[] args) {
        String strDateTime = "Sa. 07.01.2023 16:39:15";

        DateTimeFormatter parser = DateTimeFormatter.ofPattern("EEE dd.MM.uuuu HH:mm:ss", Locale.GERMAN);

        // Note: change the ZoneId as per your requirement

        Instant instantParsed = LocalDateTime.parse(strDateTime, parser)
                                             .atZone(ZoneId.of("Europe/Vienna"))
                                             .toInstant();
        System.out.println("Instant received from the server: " + instantParsed);

        Instant instantNow = Instant.now();
        System.out.println("Current instant: " + instantNow);

        System.out.println(ChronoUnit.MINUTES.between(instantParsed, instantNow) > 1);
    }
}

ONLINE DEMO