static boolean negZero(final String str,final int dp){
  if (str.charAt(0) != '-' || str.charAt(1) != '0') {
    return false;
  }
 else   if (dp == 0) {
    return true;
  }
 else   if (str.charAt(2) != '.') {
    return false;
  }
  for (int i=0; i < dp; i++) {
    if (str.charAt(3 + i) != '0') {
      return false;
    }
  }
  return true;
}

static boolean negZero ( final String str , final int dp ) { if ( str . charAt ( 0 ) != '-' || str . charAt ( 1 ) != '0' ) { return false ; } else if ( dp == 0 ) { return true ; } else if ( str . charAt ( 2 ) != '.' ) { return false ; } for ( int i = 0 ; i < dp ; i ++ ) { if ( str . charAt ( 3 + i ) != '0' ) { return false ; } } return true ; }
check if a string is of the form " - 0 . 00 " .
