1. public class Target { 2. private int i = 0； 3. public int addOne（） { 4. return ++i； 5. } 6. } And： 1. public class Client { 2. public static void main（String[] args） { 3. System.out.println（new Target（）.addOne（））； 4. } 5. } Which change can you make to Target without affecting Client？（） A. Line 4 of class Target can be changed to return i++；B. Line 2 of class Target can be changed to private int i = 1；C. Line 3 of class Target can be changed to private int addOne（） {D. Line 2 of class Target can be changed to private Integer i = 0；

单项选择题

1. public class Target {
2. private int i = 0；
3. public int addOne（） {
4. return ++i；
5. }
6. }
And：
1. public class Client {
2. public static void main（String[] args） {
3. System.out.println（new Target（）.addOne（））；
4. }
5. }
Which change can you make to Target without affecting Client？（）

A. Line 4 of class Target can be changed to return i++；
B. Line 2 of class Target can be changed to private int i = 1；
C. Line 3 of class Target can be changed to private int addOne（） {
D. Line 2 of class Target can be changed to private Integer i = 0；

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