How can I increment a date by one day in Java?

Question

I\'m working with a date in this format: yyyy-mm-dd.

How can I increment this date by one day?

Answer 1

Construct a Calendar object and use the method add(Calendar.DATE, 1);

Answer 2

If you are using Java 8, java.time.LocalDate and java.time.format.DateTimeFormatter can make this work quite simple.

public String nextDate(String date){
      LocalDate parsedDate = LocalDate.parse(date);
      LocalDate addedDate = parsedDate.plusDays(1);
      DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-mm-dd");
      return addedDate.format(formatter); 
}

Answer 3

Date newDate = new Date();
newDate.setDate(newDate.getDate()+1);
System.out.println(newDate);

Answer 4

I prefer to use DateUtils from Apache. Check this http://commons.apache.org/proper/commons-lang/javadocs/api-2.6/org/apache/commons/lang/time/DateUtils.html. It is handy especially when you have to use it multiple places in your project and would not want to write your one liner method for this.

The API says:

addDays(Date date, int amount) : Adds a number of days to a date returning a new object.

Note that it returns a new Date object and does not make changes to the previous one itself.

Answer 5

long timeadj = 24*60*60*1000;
Date newDate = new Date (oldDate.getTime ()+timeadj);

This takes the number of milliseconds since epoch from oldDate and adds 1 day worth of milliseconds then uses the Date() public constructor to create a date using the new value. This method allows you to add 1 day, or any number of hours/minutes, not only whole days.

Answer 6

java.time

On Java 8 and later, the java.time package makes this pretty much automatic. (Tutorial)

Assuming String input and output:

import java.time.LocalDate;

public class DateIncrementer {
  static public String addOneDay(String date) {
    return LocalDate.parse(date).plusDays(1).toString();
  }
}