Add hours, minutes or seconds to a date

       

import java.util.Calendar;
 
public class DateAddHour {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance();
        System.out.println("Original = " + calendar.getTime());
 
        // Subtract 2 hour from the current time
        calendar.add(Calendar.HOUR, -2);
 
        // Add 30 minutes to the calendar time
        calendar.add(Calendar.MINUTE, 30);
 
        // Add 300 seconds to the calendar time
        calendar.add(Calendar.SECOND, 300);
        System.out.println("Updated  = " + calendar.getTime());
    }
}

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Add hours, minutes or seconds to a date : Calendar Date « Development Class « Java

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