fork(3) download
  1. import java.util.*;
  2. import java.util.regex.*;
  3. import java.lang.*;
  4. import java.io.*;
  5.  
  6. class Ideone
  7. {
  8. public static void main (String[] args) throws java.lang.Exception
  9. {
  10. String longString = "Amal Kamal Jamal Amitha Farook Amani Tom Adele George Ariana";
  11. String pattern = "(?i)(?<!\\S)a[a-z]{4,}(?!\\S)";
  12. Pattern checkRegex = Pattern.compile(pattern);
  13. Matcher regexMatcher = checkRegex.matcher(longString);
  14. while (regexMatcher.find()) {
  15. System.out.println(regexMatcher.start() + " : " + regexMatcher.group());
  16. }
  17. }
  18. }
Success #stdin #stdout 0.05s 4386816KB
stdin
Standard input is empty
stdout
17 : Amitha
31 : Amani
41 : Adele
54 : Ariana