Question:
i have a variable
String date = "10.11.2016";
how do i convert it to
String date = "09.11.2016";
It needs to be done for any date. How can this be done?
Answer:
First, you need to get a representation of a given date in the form of a class object that is designed to work with dates. This class is the Calendar class.
You get an instance of the Calendar class:
Calendar calendar = Calendar.getInstance();
Create an object that converts a date as a string (of a specific format) to an object of the Date class:
SimpleDateFormat sdf = new SimpleDateFormat("dd.MM.yyyy");
Get a Date class object from your string and initialize calendar :
calendar.setTime(sdf.parse(date));
Modify the calendar object by decrementing the date:
calendar.add(Calendar.DATE, -1);
Get the text representation of the calendar object:
date = sdf.format(calendar.getTime());