EN
Java - subtract hours from Date (java.util.Date)
7 points
Hi, today I would like to show you how to subtract hours from Date in Java.
Quick solution:
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Date dateNow = new Date();2
LocalDateTime localDate = LocalDateTime3
.ofInstant(dateNow.toInstant(), ZoneId.systemDefault()).minusHours(2);4
Date dateSubtracted = Date.from(localDate.atZone(ZoneId.systemDefault()).toInstant());5
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System.out.println(dateNow); // Sat Dec 19 16:42:12 CET 20207
System.out.println(dateSubtracted); // Sat Dec 19 14:42:12 CET 2020In above example we subtracted 2 hours from current time.
Full example with imports:
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import java.time.LocalDateTime;2
import java.time.ZoneId;3
import java.util.Date;4
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public class Example {6
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public static void main(String[] args) {8
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Date dateNow = new Date();10
LocalDateTime localDate = LocalDateTime11
.ofInstant(dateNow.toInstant(), ZoneId.systemDefault()).minusHours(2);12
Date dateSubtracted = Date.from(localDate.atZone(ZoneId.systemDefault()).toInstant());13
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System.out.println(dateNow); // Sat Dec 19 16:42:12 CET 202015
System.out.println(dateSubtracted); // Sat Dec 19 14:42:12 CET 202016
}17
}