regex - Java Regular Expression removing everything but numbers from String

Question

I have two strings string1 = 44.365 Online order and string2 = 0 Request Delivery. Now I would like to apply a regular expression to these strings that filters out everything but numbers so I get integers like string1 = 44365 and string2 = 0.

How can I accomplish this?

Answer 1

You can make use of the ^. It considers everything apart from what you have infront of it.

So if you have [^y] its going to filter everything apart from y. In your case you would do something like

String value = string.replaceAll("[^0-9]","");

where string is a variable holding the actual text!