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https://stackoverflow.com/questions/19310662/how-to-subtract-an-hour-from-current-timestamp#:~:text=add%28int%20field%2Cint%20amount%29Adds%20or%20subtracts%20the%20specified%20amount,by%20calling%3A%20Calendar%20cal%20%3D%20Calendar.getInstance%28%29%3B%20cal.add%28Calendar.HOUR%2C%20-1%29%3B
https://www.tutorialspoint.com/java-program-to-subtract-hours-from-current-time-using-calendar-add-method
Firstly, create a Calendar object and display the current date and time. Calendar calendar = Calendar.getInstance (); System.out.println ("Current Date and Time = " + calendar.getTime ()); Now, let us increment the hours using the calendar.add () method and Calendar.HOUR_OF_DAY constant. Set a negative value since you want to decrease the hours. …
https://stackoverflow.com/questions/56243594/how-to-add-and-subtract-hours-and-minutes
Make use of Calendar#add for this. Confusingly, you can use it to both add and subtract. final Calendar calendar = Calendar.getInstance (); //A calendar set to the current time calendar.add (Calendar.HOUR_OF_DAY, 1); //Add one hour calendar.add (Calendar.HOUR_OF_DAY, -1); //Subtract one hour.
http://www.instanceofjava.com/2017/10/how-to-subtract-hours-from-date-java-8.html
* program: how to subtract hours from date time using java 8 * */ import java.time.LocalDateTime; import java.time.format.DateTimeFormatter; public class SubstractHoursJava{public static void main(String[] args) { DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"); String currentTime= "2017-10-19 …
https://careydevelopment.us/blog/java-8-date--time-how-to-add-and-subtract-hours-days-or-months-from-a-localdatetime-object
Fortunately, the Java date and time library offers a couple of intuitive methods for adding and subtracting time units to an existing LocalDateTime, LocalTime, or LocalDate object. The methods are called plus () and minus (), respectively. I'll show you how to use them.
https://www.tutorialspoint.com/subtract-days-from-current-date-using-calendar-date-in-java
Firstly, create a Calendar object and display the current date. Calendar calendar = Calendar.getInstance(); System.out.println("Current Date = " + calendar.getTime()); Now, let us subtract the days using the add() method and Calendar.DATE constant. Set a negative value here since we are decrementing. calendar.add(Calendar.DATE, -2); Example. Live Demo
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