How do I add 2 weeks to a Date in java? [duplicate]

Question

I am getting a Date from the object at the point of instantiation, and for the sake of outputting I need to add 2 weeks to that date. I am wondering how I would go about adding to it and also whether or not my syntax is correct currently.

Current Java:

private final DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
private Date dateOfOrder;

private void setDateOfOrder()
{
    //Get current date time with Date()
    dateOfOrder = new Date();      
}

public Date getDateOfOrder()
{
    return dateOfOrder;
}

Is this syntax correct? Also, I want to make a getter that returns an estimated shipping date, which is 14 days after the date of order, I'm not sure how to add and subtract from the current date.

Answer 1

Use Calendar and set the current time then user the add method of the calendar

try this:

int noOfDays = 14; //i.e two weeks
Calendar calendar = Calendar.getInstance();
calendar.setTime(dateOfOrder);            
calendar.add(Calendar.DAY_OF_YEAR, noOfDays);
Date date = calendar.getTime();

Answer 2

I will show you how we can do it in Java 8. Here you go:

public class DemoDate {
    public static void main(String[] args) {
        LocalDate today = LocalDate.now();
        System.out.println("Current date: " + today);

        //add 2 week to the current date
        LocalDate next2Week = today.plus(2, ChronoUnit.WEEKS);
        System.out.println("Next week: " + next2Week);
    }
}

The output:

Current date: 2016-08-15
Next week: 2016-08-29

Java 8 rocks !!