What's the problem ?
See help on code tags, would be more readable if you add =java.

>> what does it mean to say we have a 32-bit processor ?!!
In very dummy terms it means the processor would process 32-bits in one machine cycle. Say if it's 2GHz processor, it'll process 32-bits 2...

No way I can understand so much of code without code tags..

Guess you wanna know how to use an array. Here is a crash course:
1. Declare and define an array:
type var_name[] = new type[array_size] ; Where type could be a basic type (like int, boolean...) or...

You, I doubt it.. in any case Moderator can do it and I hope he doesn't for other sake.. sorry..

public class Main
{
public static void main(String args[ ])
{
String word = "abcdefghijklmnopqrstuvwxyz0123456789";
System.out.println(jumbleIterative(word));
...

Length of the string you pass down the recusive call chain won't change (should not change).
What should change is "what is changing in your for loop in iterative model" viz. index of character on...

A little more info would help, like what are you trying to do?? What is teh command you use to run and EXACT msg in the msg box...

1. Give complete information. E.g. error msg (as printed on your console) so we know which line are we talking abt... ??
2. Is the error runtime or compile time??
3. Without that info all I can...