输出的结果不应该是 ： java.......java 么
public class Demo3{
public static void main(String[] args) {
StringBuilder s1 = new StringBuilder("hello");
StringBuilder s2 = new StringBuilder("java");
show(s1,s2);
System.out.println(s1+"......."+s2);
}
private static void show(StringBuilder s1, StringBuilder s2) {
s1.append(s2);
s1 = s2;
}
}