Resolved: Remove leading zeros from a string using regex

Question:

I am learning regex and java and working on a problem related to that.
I have an input string which can be any dollar amount like
it also could be
I am trying to find if the dollar amount has leading zeros and trying to remove it.
so far I have tried this
But I guess I’m doing something wrong. I just want to remove the leading zeros, not the ones between the amount part and not the one in cents. And if the amount is $0.1, I don’t want to remove it.

Answer:

Match zeroes or commas that are preceded by a dollar sign and followed by a digit:

str = str.replaceAll(“(?<=\\$)[0,]+(?=\\d)", ""); [/code]

See live demo.
This covers the edge cases:

• $001.23 -> $1.23
• $000.12 -> $0.12
• $00,123.45 -> $123.45
• $0,000,000.12 -> $0.12

The regex:

• (?<=\\$) means the preceding character is a dollar sign
• (?=\\d) means the following character is a digit
• [0,]+ means one or more zeroes or commas

To handle any currency symbol:

str = str.replaceAll(“(?<=[^\\d,.])[0,]+(?=\\d)", ""); [/code]

See live demo.

If you have better answer, please add a comment about this, thank you!