Get all numbers from long string

Question

I'm new to Java. How I can get only the numbers from this String:

folder333

Can you show me some basic example?

Also I would like to do this with Java 8.

What is number in your case? integer? Do you accept hexadeimal ones (e.g `0x456`)? Float? Should minuses (if any) be included into the number(s)? Could you provide a good test expample? — Dmitry Bychenko, Mar 03 '15 at 10:48
Possible duplicate of http://stackoverflow.com/questions/14974033/extract-digits-from-string-stringutils-java or http://stackoverflow.com/questions/1903252/extract-integer-part-in-string or http://stackoverflow.com/questions/2367381/extract-numbers-from-a-string-java — OO7, Mar 03 '15 at 10:53

score 4 · Accepted Answer · answered Mar 03 '15 at 10:48

4

Try something like:

String number = str.replaceAll("^[a-zA-Z]*", "");

answered Mar 03 '15 at 10:48

SMA

@PeterPenzov There is nothing specific here for Java 8. – JamesB Mar 03 '15 at 11:04

1 Answers1