Question

How to extract all digits from a string in Java

Answer 1

public class Program {

    public static String extractDigits(String s) {
        return s.replaceAll("[^0-9]", "");
    }

    public static void main(String args[]) {
        String s = "4hjdsf72q1p0on 98 mqjava331";

        String digits = extractDigits(s);

        System.out.println(digits);   // 47210993
    }
}


/*
run:

4721098331

*/

 

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