regex to strip leading zeros treated as string

Question

I have numbers like this that need leading zero\'s removed.

Here is what I need:

00000004334300343 -> 4334300343

000

Answer 1

Accepted solution will fail if you need to get "0" from "00". This is right one:

str = str.replaceAll("0+(?!$)", "");

"^0+(?!$)" means match one or more zeros if it is not followed by end of string.