how to extract numeric values from input string in java

Question

How can I extract only the numeric values from the input string?

For example, the input string may be like this:

String str=\"abc d 1234567890pqr 548         


        

Answer 1

You want to discard everything except digits and spaces:

String nums = input.replaceAll("[^0-9 ]", "").replaceAll(" +", " ").trim();

The extra calls clean up doubled and leading/trailing spaces.

If you need an array, add a split:

String[] nums = input.replaceAll("[^0-9 ]", "").trim().split(" +");