String Index out of bound exception

Question

I am trying to get substring from string. I have the following
String var = "20051221032435"
String var2 = var.substring(0,4)+"/"+var.substring(4,2)+"/"+var.substring(6,2)However, when i tried step by step run, it showed the first part (0,4) substring
correctly, but shows StringIndexOutofBoundException when moving to the second substring.
Why am i getting the above exception? how can it be solved?
basically, im just trying to convert the var to YYYY/MM/DD HH:MM:SS time format.

Answer 1

The first argument is the beginning index, and the second argument is the ending index. The second argument is not the length of the substring (which is IMO more conventional, but sadly not the way it works).
BTW, you do not need to do all of this. To parse dates use java.text.DateFormat. To extract parts of dates or manipulate them, use java.util.Calendar.
- Saish