Convert Datetime to unixtime

Question

Good morning guys, can anyone help me? I have a Java application and I need to do a conversion.. Where is localDate for unixtime.. How can I do that?

This is my localDate:

for (Telemetry telemetry : listTelemetry) {


        telemetry.getInstant();
}

Entity:

public LocalDateTime getInstant() {
    return instant;
}

Answer 1

You can use it like this

public Long getInstant() {
    Date date = new Date();
    return date.getTime();
}

Note the type of data returned which in the case of getTime is a Long representing a Timestamp. Date will return an object containing the Current System Date and Time as defined by the Operating System.

To use the Localdatetime object you can use it like this:

    LocalDateTime d = LocalDateTime.now(); // momento atual
    // Use ZoneId.systemDefault() para pegar o ZoneId do SO
    Date date2 = Date.from(d.atZone(ZoneId.systemDefault()).toInstant());
    // ou defina qual ZoneId deseja
    Date date2 = Date.from(d.atZone(ZoneId.of("America/Sao_Paulo")).toInstant());
    System.out.println(date2.getTime());

If you want to return the Localdatetime object from a database information use something like this

String str = "1986-04-08 12:30";
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");
LocalDateTime dateTime2 = LocalDateTime.parse(str, formatter);
Date date3 = Date.from(dateTime2.atZone(ZoneId.of("Europe/London")).toInstant());
System.out.println(date3.getTime());

See the code working on https://ideone.com/oivrsH