gistfile1.java

case '#':
    c = readCharacter();
    char[] buffer = new char[4];
    switch (c) {
        case 't':
            reader.read(buffer, 0, 3);
            if (buffer[0] != 'r' || buffer[1] != 'u' || buffer[2] != 'e') {
                throw new InvalidTokenException();
            }
            return new Lexeme(Lexeme.Token.BOOLEAN, true);
        case 'f':
            reader.read(buffer, 0, 4);
            if (buffer[0] != 'a' || buffer[1] != 'l' || buffer[2] != 's' || buffer[3] != 'e') {
                throw new InvalidTokenException();
            }
            return new Lexeme(Lexeme.Token.BOOLEAN, false);
        case 'n':
            reader.read(buffer, 0, 3);
            if (buffer[0] != 'u' || buffer[1] != 'l' || buffer[2] != 'l') {
                throw new InvalidTokenException();
            }
            return new Lexeme(Lexeme.Token.NULL);
        default:
            throw new InvalidTokenException();
    }