public int indexIn(CharSequence csq,int fromIndex){
  for (int i=fromIndex, n=csq.length(); i < n; i++) {
    if (contains(csq.charAt(i)))     return i;
  }
  return -1;
}

public int indexIn ( CharSequence csq , int fromIndex ) { for ( int i = fromIndex , n = csq . length ( ) ; i < n ; i ++ ) { if ( contains ( csq . charAt ( i ) ) ) return i ; } return - 1 ; }
returns the first index in the specified character sequence of one of the character of this set .
