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

Another solution (might be more intuitive to read)

str = str.replaceFirst("^0+", "");

^ - match the beginning of a line
0+ - match the zero digit character one or more times

A exhausting list of pattern you can find here Pattern.