單項選擇題

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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單項選擇題

package test；
class Target {
public String name = “hello”；
}
What can directly access and change the value of the variable name？（）

A. any class
B. only the Target class
C. any class in the test package
D. any class that extends Target

多項選擇題

Which two are true？（）

A. An encapsulated， public class promotes re-use.
B. Classes that share the same interface are always tightly encapsulated.
C. An encapsulated class allows subclasses to overload methods， but does NOT allow overriding methods.
D. An encapsulated class allows a programmer to change an implementation without affecting outside code.

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package test； class Target { public String name = “hello”； } What can directly access and change the value of the variable name？（）

Which two are true？（）

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package test；
class Target {
public String name = “hello”；
}
What can directly access and change the value of the variable name？（）

Which two are true？（）