Flip int value(1234 becomes 4321)

[Pojahn_M]

Is there a fast way to flip an int? For example:

int i = 1234;
System.out.println(flipInt(i)); //4321

This could be done by converting it to a string and reverse it. But it is a very inefficient and expensive way to do it. Is there any faster way?
Like with bit shifting?

[Norm]

Look at using the %, /, + & * operators

[Fubarable]

Careful though.

What is the result of flipping 1230?

what the result from the flip above -- what about 321?
Should it result in 123? 1230? 12300?