Splitting a double into an array Java

Question

I am writing a program that changes doubles into arrays. So if i had this:

double d = 1.23456

I woud want an array like this:

array[0] = 1
array[1] = 2
array[2] = 3

and so on.

Another example:

double d = 3.1415926

to

array[0] = 3
array[1] = 1
array[5] = 9

Some of you wanted to see my code, so here it is:

long l = (new Double(3.1415926)).longValue();
String s = Long.toString(l);
System.out.println(l); //prints 3, so splitting won't have any effect
System.out.println(s); //prints 3, so splitting won't have any effect

Answer 1

Maybe the simplest solution is to create a string from double:

String s = Double.toString(d);

and then parse it skipping decimal dot, and fill your array.

Answer 2

Please Try this

 public static void main(String[] args) 

    {
        Double d = 1.2546;

        String s = d.toString();
        int a[] = new int[s.length()];
        for(int i=0;i<s.length();i++)
        {
            if(s.charAt(i)!='.')
            {
                a[i]=Integer.parseInt(s.charAt(i)+"");
                System.out.println(a[i]);
            }
        }

    }

ouput

1
2
5
4
6

Answer 3

double d = 1.23456;

ArrayList<Integer> arrayList = new ArrayList<>();
while (d != 0) {
    arrayList.add((int) d);
    d = (d - ((int) d)) * 10.0;
}
System.out.println(arrayList.toString());

Probably not the best solution, but it should work.

Answer 4

double d = 3.14159;
String s = String.valueOf(d); // convert the double to a string
s = s.replace(".", ""); // delete all dots from the string
int[] ints = new int[s.length()]; // create an array to hold each digit
for (int i = 0; i < ints.length; i++) { // foreach character in the string
     // convert the next character in the string to an int and save it to array
    ints[i] = Integer.parseInt(s.substring(i, i + 1));
}
// print the array
for (int i : ints) System.out.println(i);