fork(5) download
  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Ideone
  6. {
  7. public static void main (String[] args) throws java.lang.Exception
  8. {
  9. String email = "123456789@gamil.com";
  10. System.out.println(email.replaceAll("(\\G(?!^)|^[^@]{2})[^@](?=[^@]{2,}@)", "$1*"));
  11. }
  12. }
Success #stdin #stdout 0.07s 33848KB
stdin
Standard input is empty
stdout
12*****89@gamil.com