reading digits from a double

[Justin Kuyken]

I was just wondering how to read say the first digit from a double
for example if my double is 2400....read the 2 and use that and read the 4 and use that seperatly
Is this even possible?
Its for doing the colour code for resistors if anyone has any other ideas
Thanks Justin

[Barry Gaunt]

You could use Double.toString(yourDouble) and extract numeric characters with String.subString(). Then convert your numeric characters back to a numeric primitive type.

Otherwise you will have to play around dividing by powers of 10 and taking remainders on division by 10.

[David Ulicny]

Convert the double to String and read it by single characters.

[Chris Allen]

Why not something like the following:

class getNum {
  public static void main(String[] args) {
    double d = 2400;
    String s = Double.toString(d);
    for(int t=0;t<s.length();t++) {
      if(".".equals(s.substring(t,t+1)))
        break;
      else
        System.out.println(s.substring(t,t+1));
    }
  }
}

I had to put extra code in to stop at the decimal place (since you asked to parse a double instead of an int). Is this what you are looking for?

Wow, didn't realize so many people were looking at the same post!
[ October 25, 2004: Message edited by: Chris Allen ]