Java开发网 - 那里错了

Topic: 那里错了

1.那里错了

Posted by: xiaopan
Posted on: 2003-03-17 13:25

1. package foo;
2.
3. import java.util.Vector;
4.
5.private class MyVector extends Vector{
6. int i=1;
7. public MyVector(){

8. i = 2;
9. }

10.}
11.
12. public class MyNewVector extends MyVector{
13. public MyNewVector(){

14. i=4;
15. }
16. public static void main(String args[]){
17. MyVector v= new MyNewVector();

18. }
19. }

what is the result?
a.Compilation succeeds.
b.Compilation fails because of an error at line4.
c.Compilation fails because of an error at line6.
d.Compilation fails because of an error at line14.
e.Compilation fails because of an error at line17.

为什么错在17行,我在编译时告诉我5行不能声明为PRIVATE ?请高手指教

2.Re:那里错了 [Re: xiaopan]	Copy to clipboard
Posted by: kenwil Posted on: 2003-03-17 14:30 you should use public on line 5 so can make a class, method, or variable accessible from any other class

3.Re:那里错了 [Re: xiaopan]	Copy to clipboard
Posted by: xiaopan Posted on: 2003-03-17 15:19 I know that the wrong line is 5 but what the key is e

4.Re:那里错了 [Re: xiaopan]	Copy to clipboard
Posted by: yj780210 Posted on: 2003-03-18 09:04 从外部访问不到MyVector 当然出错了。