Incompatible types - found java.lang.String but expected int, in java

Question

Displays the date 100 days from today, the day you were born, and the date 10,000 days after your birth date. I've done all that, but i want to take it a step further, i want the user to be able to input the number of days from today that he/she wishes to know the date of (if that makes any sense at all...). Here's what the part of the code i'm working on looks like:

 public class calendarProjectTest
    {
    public static void main(String[] args)
    { GregorianCalendar cal = new GregorianCalendar(); //declare today's date
    GregorianCalendar myBirthday = new
    GregorianCalendar(1990, GregorianCalendar.JUNE, 9); //declare my birthday
    System.out.println("Please enter a number greater than 0:");
    Scanner keyboard = new Scanner(System.in);
    String number = keyboard.next();
    int value = number;
    cal.add(GregorianCalendar.DAY_OF_MONTH, number);

I'm using Bluej and it says, "incompatible types - found java.lang.String but expected int" I'm at a loss. i don't have any idea what to do. any advise would be great. and yes, i know there are no end brackets.

Answer 1

Change this:

cal.add(GregorianCalendar.DAY_OF_MONTH, Integer.parseInt(number));

As you can see from the docs, the add() method needs both parameters as int.

Answer 2

Use this:

int value = Integer.parseInt(number);

Answer 3

problem lies here

String number = keyboard.next();
int value = number;

instead use :

int value = keyboard.nextInt(); // you will get parsed int value
cal.add(GregorianCalendar.DAY_OF_MONTH, value);

Answer 4

Keyboard.next(); returns a string, not an integer.

so int value = number is trying to assign a string value to an int type. try putting this instead: int value = Integer.parseInt( number );

want more info about GregorianCalendar and http://www.vogella.com/articles/JavaDateTimeAPI/article.html