How to convert Sting `8.1.009.125` to `double` array? java

Question

How to convert Sting 8.1.009.125 to double array?

double[] arr = new double[4];
arr[0] = 8;
arr[1] = 1;
arr[2] = 0.09;
arr[3] = 125;

Not considered.String may be ulimited length, and may contains zeros at the begining.

  for (int i = 0; i <arr.length ; i++) {
        arr[i] = Double.valueOf(s1.replace(".", ""));
    }

result for arr filling: [8.1009125E7, 8.1009125E7, 8.1009125E7, 8.1009125E7]

I need to get [8, 1, 0.09, 125] from String = "8.1.009.125"

Main problem is String delimeted by dots.

And I need save value 0.09 from String temp = "8.1.009.125"

to get an Number array (float, double) [8, 1, 0.09, 125]

How can I do this?

May be there is another way? Besides array?

Answer 1

That's of course untested code...

public Double[] convertTab(String myStr) {
  //We start by splitting the string:
  String[] tab = myStr.split("\\.");

  //We need a structure of double as a result
  List<Double> result = new ArrayList<Double>();

  //Then we loop on the different elements of the table
  for (String sNum : tab) {
    //Then we convert, which isn't easy because the rules are ambiguous in your question
    result.add(convertDouble(sNum);
  }

  return result.toArray();
}

public double convertDouble(String sDouble) {
  int accu = 1;
  for (int i=0;i<sDouble.length();i++) {
    //We count the number of 0
    if (sDouble.charAt(i) == '0') {
      accu = accu*10;
    } else {
      //Parsing of the remaining digits and division
      return Double.parseDouble(sDouble)/accu;
    }
}

Answer 2

There is some workaround for your specific case. If you have string with zero at the begining 009 you can create a new one with right format 0.09 and then convert to double value as Double.valueOf(string)

Try this:

public static void main(String[] args) {
    String s = "8.1.009.125";
    String[] strings = s.split("\\.");
    for (String string : strings) {
        if (string.startsWith("0")) {
            string = "0." + string.substring(1);
        }
        System.out.println(Double.valueOf(string));
    }

}

Answer 3

First you split your String , create a double array with the same size and copy the elements, modifying them where necessary.:

String inputArray[] = input.split("\\.");

double outputArray = new double[input.length];

for (int index = 0; index < inputArray.length; index++) {
    if ((inputArray[index].length() > 1) && (inputArray[index].startsWith("0"))) inputArray = inputArray.substring(0, 1) + "." + inputArray.substring(1);
    outputArray[index] = Double.valueOf(inputArray[index]);
}