As a developer, one may come across use cases where he/she needs to add or subtract a few days from a Date object, let's take a look at a few examples.
Example 1: Add days using java.util.Calendar (Java 7 or before)
import java.util.Calendar;
public class AddDaystoDateExample {
public static void main(String[] args) {
Calendar calendar = Calendar.getInstance();
int addDays = 10;
calendar.add(Calendar.DAY_OF_YEAR, addDays);
System.out.println("Date after adding 10 days: " + calendar.getTime());
}
}
Output:
Example 2: Add Days using java.time.LocalDateTime (Java 8 or above)
import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;
public class AddDaystoDateExample {
public static void main(String[] args) {
LocalDateTime currentDateTime = LocalDateTime.now();
int addDays = 5;
LocalDateTime newDateTime = currentDateTime.plus(addDays, ChronoUnit.DAYS);
System.out.println("Date after adding 10 days: " + newDateTime);
}
}
import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;
public class AddDaystoDateExample {
public static void main(String[] args) {
LocalDateTime currentDateTime = LocalDateTime.now();
int addDays = 5;
LocalDateTime newDateTime = currentDateTime.plus(addDays, ChronoUnit.DAYS);
System.out.println("Date after adding 10 days: " + newDateTime);
}
}
Output:
Example 3: Subtract days from Date
import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;
public class SubtractDaysFromDateExample {
public static void main(String[] args) {
LocalDateTime currentDateTime = LocalDateTime.now();
int subtractDays = -5;
LocalDateTime newDateTime = currentDateTime.plus(subtractDays, ChronoUnit.DAYS);
System.out.println("Date after subtracting 5 days: " + newDateTime);
}
}
Output:
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Rakesh (He/Him) has over 14+ years of experience in Web and Application development. He is the author of insightful How-To articles for Code2care.
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