单项选择题
A.Delete from user;
B.Truncate table user;
C.Drop table user;
D.Delete user;
单项选择题 Spring Cloud中的注册中心是()
单项选择题 程序输出结果为()public class Test {public static void main(String[] args) {StringBuffer a = new StringBuffer("A");StringBuffer b = new StringBuffer("B");operator(a,b);System.out.println(a+","+b);}public static void operator(StringBuffer x,StringBuffer y){x.append(y);y=x;} }
单项选择题 在java 1.8中关于接口和抽象类的说法,错误的是()