This regular did not understand , who gave me explain ?

  		 i = 0;
  		 p = Pattern.compile("(fds){2,}");//(fds){2,}
  		 m = p.matcher("dsa da fdsfds aaafdsafds aaf");
  		 sb = new StringBuffer();
  		
  		 while (m.find())
  		 {
  		 m.appendReplacement(sb, "dog");
  		 i++;
  		 }
  		 m.appendTail(sb);
  				
  		 System.out.println(sb.toString());
  		 System.out.println(i);
  

(fds) {2,} is two or more times fds do ? Is for example : fdsfds fdsfdsfds match such strings do ?
Why did not match the second string aaafdsafds on quite incomprehensible , did not write to match the beginning and end , ah,
Is not that many matches ? But (fds) {2,} + did not match up ah ?
------ Solution ---------------------------------------- ----
fds appear together twice or more than twice
------ For reference only --------------------- ------------------
be consecutive ~ ~
------ For reference only ------------ ---------------------------
want to get your results , it should be (fds *) {2,} < br> ------ For reference only ---------------------------------------
of all to you, a mistake is behind the middle there is a fdsafds did not see , I said, and they understand how inconsistent, get rid of that after a normal, and consistent with their own understanding of the