How to replace a value or string with another string or value in java using regex? Condition : it should replace only that lengt

Question

ex. Val is 00000000 and my replace value is 234 and my expected output is 23400000.it should replace first 3 only

Answer 1

This article is perfect for you.

Check the \d part, which talks about digits 0 to 9.

Answer 2

https://www.vogella.com/tutorials/JavaRegularExpressions/article.html

My bad