Question

I am having a problem tring to split a sting based on parentheses.
I have a String like this
Fe(C5H5)2FeO3 and I need to split the sting in to an array so the array reads

Fe

(C5H5)2

FeO3

Im an using this code.

String form = "Fe(C5H5)2FeO3";
from.split([()]+);

I am having trouble getting the characther after the “)” to split out.
This also has to work for multiple sets of () in the same string.

Thanks

Answer 1

positive look ahead and look behind can do some of this:

String formula = "Fe(C5H5)2FeO3";      
String regex = "(?=\\()|(?<=\\)\\d)";
String[] tokens = formula.split(regex );
System.out.println(Arrays.toString(tokens));

For more on this, check out the regular expressions tutorial