Question

Possible Duplicate:
Split string to equal length substrings in Java

I have a String[] data-structure, which is like this

0.1953601.3675211.3675214.1025640.5860811.36752110.3540903.711844-5.2747252.539683

I want to split this into an array like this

  0.195360
  1.367521
  1.367521
  4.102564
  0.586081
  1.367521
 10.354090
  3.711844
 -5.274725
  2.539683

so after the decimal the values have 6 significant figures

I tried using regex solution from this question but it doesnt seem to work.

even this

System.out.println(Arrays.toString(
  "Thequickbrownfoxjumps".split("(?<=\\G.{4})")
));

gives me an output of [Theq, uickbrownfoxjumps] not [Theq, uick, brow, nfox, jump, s] how I would expect it to.

Answer 1

The assertion

the size of each value is 8, but if the value is negative its 9

in the question is false because if I split the entry manually here is the result:

0.195360
1.367521
1.367521
4.102564
0.586081
1.367521
10.35409
03.71184   <<< As you can see, it's not that you want
4-5.2747   <<< It's not a number
252.5396
83         <<< Bang! too short

I presume the true assertion is “the number of digit after dot is 6”, in this case the split becomes:

  0.195360
  1.367521
  1.367521
  4.102564
  0.586081
  1.367521
 10.354090
  3.711844
 -5.274725
  2.539683

The code is here:

static String[] split( String in ) {
   List< String > list = new LinkedList< String >();
   int dot = 0;
   for( int i = 0; dot > -1 && i < in.length(); i = dot + 7 ) {
      dot = in.indexOf( '.', i );
      if( dot > -1 ) {
         int last = Math.min( dot + 7, in.length());
         list.add( in.substring( i, last ));
      }
   }
   return list.toArray( new String[list.size()]);
}