private final int load_exponent ( StringBuilder sb ) throws IOException { int c = read_char ( ) ; if ( c == ' ' || c == ' ' ) { sb . append ( ( char ) c ) ; c = read_char ( ) ; } c = load_digits ( sb , c ) ; if ( c == ' ' ) { sb . append ( ( char ) c ) ; c = read_char ( ) ; c = load_digits ( sb , c ) ; } return c ; }
can unread it