第23题: [单项选择]执行下列程序后,输出结果为( )。 public class Test { public static void main (String[] args) { StringBuffer sb = new StringBuffer("北京 2008" ); System. out. println ("length =" + sb. length ( ) ); } } A. length = 8 B. length = 10 C. length = 6 D. length = 20 参考答案:C 答案解析:[解析] StringBuffer类的length()函数是求出字符序列的长度。