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  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 s = "analitics@gmail.com@5";
  10. System.out.println(s.replaceAll("^((?:[^@\\s]+@){2}).+", "$1"));
  11. }
  12. }
Success #stdin #stdout 0.09s 48652KB
stdin
Standard input is empty
stdout
analitics@gmail.com@