Regular expression for numeric copy

[Kishore Dandu]

If i have a string with both numeric and alpha characters, how do i copy only the numeric values in to a new string from original(using regex)?

[Ove Lindström]

That would be (\d+)[\i] or [i]"(\\d+)" as a Java-string.

If I give it the string "abc123def456ghi", I get 123 in group 0 and 456 in group 1.

You can test your regexp online at http://www.fileformat.info/tool/regex.htm.

[Piet Verdriet]

The easiest way would be to replace all non-digits from the original String:

String original = "ab12cd34ef56";
String digits = original.replaceAll("\\D", "");

[ September 04, 2008: Message edited by: Piet Verdriet ]