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Java : How to find the counts of digits/numbers in a string using Java?


We can go with String method using regex pattern to find the count of valid digits in a string Input.


Example:

public class Test {
     public static void main(String[] args) {
         String inputStr = "1234 Number count test example using String method @@#@";
        System.out.println("Digits Count:"+(inputStr.length()-inputStr.replaceAll("[0-9]", "").length()));
         }


Output:

Digits Count:4



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