Reading file data into two arrays (not array lists)

Question

I have a file:

A,0.3
B,0.1
C,0.2
 ...

And I want the resulting arrays to be of the form:

String[] symbols = {A, B, C, ...}

Double[] frequencies = {0.3, 0.1, 0.2, ...}

I have figured this out using ArrayList (.add() is nice), but after some design decisions, I want the data in regular arrays. Obviously my implementation below does not work, but it's the closest I've come:

while (scan.hasNextLine()) {
        count ++;             // Number of lines incremented

        String[] parts;
        parts = r.split(",");

        // Store symbols into its own array
        for(int i = 0; i < count; i ++)
                syms[i] = parts[0];

        // Store frequencies into its own array
        for(int i = 0; i < count; i ++)
                freqs[i] = Double.parseDouble(parts[1]);
        }

Count keeps track of the amount of scanned lines (true while conditions), which at first seemed unnecessary to me, but I'm trying it now. Hence the help. Thanks.

Answer 1

Solved: i have created an array of 5 but the good procedure is to use array-list to increase decrease the size of array dynamically

 public static void main(String[] args) throws IOException {

String[] myArray;
double[] doubleArray = new double[5];
String[] strArray= new String[5];

     int inc1=0;
     int inc2=0;
     FileReader fileReader = new FileReader("test.txt");
     Scanner s= new Scanner(fileReader);

     while(s.hasNext()){
           myArray= s.next().split(",");
       // to store double values
    for (String getStr: myArray) {
        if(isDouble(getStr)==true){
            doubleArray[inc1]= Double.parseDouble(getStr);
            inc1++;
        }
       // to store string values
        else {
            strArray[inc2]=getStr;
            inc2++;
        }
  }
  }

      for(String ss : strArray){
             System.out.println("str value-> : "+ ss);
         }
         for(Double nnn : doubleArray){
             System.out.println("double value-> : " + nnn);
         }

      fileReader.close();

}

check its convertible or not if its than it sends true else false

 public static boolean isDouble( String input ) {
    try {
        Double.parseDouble(input );
        return true;
    }
    catch( Exception e ) {
        return false;
    }
}

Testfile contains:

A,0.3 
B,0.1 
C,0.2
d,0.4 
e,0.5 

output :

str value-> : A
str value-> : B
str value-> : C
str value-> : d
str value-> : e
double value-> : 0.3
double value-> : 0.1
double value-> : 0.2
double value-> : 0.4
double value-> : 0.5

hope answered the question if its useful than vote up