How to convert comma seperated java string to an array.

Yes, use String.split() method to do it. See the example below −

Example

public class Tester {
   public static void main(String[] args) {
      String text = "This,is,a,comma,seperated,string.";
      String[] array = text.split(",");
      for(String value:array) {
         System.out.print(value + " ");
      }
   }
}

Output

This is a comma seperated string.