Converting double to int.

[Haakon Lind]

Hi! I`ve got an assignment wich causes me to find out if a number is a decimal or not, in short.
So I+m thinkingof converting a double number to integer and see if the number changes. But I can`t get the conversion right, what am I doing wrong here ?

  
class Oppg2 {
  public static void main(String[] args) {
    double number = 23.45 ;
    int intnumber ;
    System.out.println(number) ;
    intnumber = new Integer(number.intValue()) ;
    System.out.println(intnumber) ;
  }
}

Getting the error :
double cannot be dereferenced.
Is what I`m trying to do possible, is it the best way of doing it?
Thanks

[Ron Newman]

"number" is a primitive. You cannot call a method on it using object syntax -- number.intValue().

[Ron Newman]

To convert a double to an int, just cast it:

    double d;
    ...
    int i = (int) d;

To convert back to an int, you can just assign, no cast needed:

    double d2 = i;

[Anthony Villanueva]

Originally posted by Haakon Lind:
Hi! I`ve got an assignment wich causes me to find out if a number is a decimal or not, in short.

Try getting the value as a String, then parse it using StringTokenizer for the decimal point. Just a suggestion.

[Haakon Lind]

Thanks Ron,
I actually didn`t know that variables are primitive, i thought only direct input of char, int, double etc. was primitive.
My Idea should work out now as it gave me what I expected.
Thanks for input Anthony, but think that will require one or two more lines of code
Thanks!