public class Foo {
2. public static void main (String [] args) {
3. StringBuffer a = new StringBuffer (“A“);
4. StringBuffer b = new StringBuffer (“B“);
5. operate (a,b);
6. system.out.printIn{a +“ ”+b};
7. )
8. static void operate (StringBuffer x, StringBuffer y) {
9. x.append (y);
10. y = x;
11. }
12. }
先放一段代码,有时间了再补齐。