使用Java netbeans从JDateChooser的值增加30天

Question

hi all I am working on a form using JDateChooser I want to get the value of date inputted by the user. Is there any ways that after storing the value of date in a variable can I add 30 days from the inputted date? This is my code in passing the date to a string variable:

String dates =((JTextField)date.getDateEditor().getUiComponent()).getText();

my problem is how can I pass the date into a variable where i can be able to add an additional 30 days on it? please help me really need this for my project .

Answer 1

To manipulate a String with a date value, you first need to convert to a Date using SimpleDateFormat , then you can perform manipulation using a Calendar .

SimpleDateFormat datefmt = new SimpleDateFormat("MM/dd/yyyy"); // Or format you're using
Date date = datefmt.parse(dates);

Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.add(Calendar.DAY_OF_MONTH, 30); // Add 30 days
Date futureDate = cal.getTime();

If you need value for insertion into a database, you will of course use PreparedStatement , so you'll need a Timestamp instead:

// From Date
Timestamp futureTimestamp = new Timestamp(futureDate.getTime());

// Directly from Calendar
Timestamp futureTimestamp = new Timestamp(cal.getTimeInMillis());