执行下列程序后,输出结果为()。public class Test {public static void main (String[] args) {St
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