10. class Inner { 
11. private int x； 
12. public void setX（ int x） { this.x = x； } 
13. public int getX（） { return x； } 
14. } 
15. 
16. class Outer { 
17. private Inner y； 
18. public void setY（ Inner y） { this.y = y； } 
19. public Inner getY（） { return y； } 
20. } 
21. 
22. public class Gamma { 
23. public static void main（ String[] args） {
24. Outer o = new Outer（）；
25. Inner i = new Inner（）； 
26.int n=10； 
27. i.setX（n）； 
28. o.setY（i）； 
29. // insert code here 
30. System.out.println（ o.getY（）.getX（））； 
31. } 
32. } 
Which three code fragments， added individually at line 29， produce the output 100？（）

public class ItemTest {  private final mt id；  public I...

单项选择题

public class ItemTest { 
private final mt id； 
public ItemTest（int id） { this.id = id； } 
public void updateId（int newId） { id = newId； } 
public static void main（String[] args） { 
ItemTest fa = new ItemTest（42）； 
fa.updateId（69）； 
System.out.println（fa.id）； 
} 
} 
What is the result？（） 

public class Item {  private String desc；  public Strin...

单项选择题

public class Item { 
private String desc； 
public String getDescription（） { return desc； } 
public void setDescription（String d） { desc = d； }
public static void modifyDesc（Item item， String desc） { 
item = new Item（）； 
item.setDescription（desc）； 
} 
public static void main（String[] args） { 
Item it = new Item（）； 
it.setDescription（”Gobstopper”）； 
Item it2 = new Item（）； 
it2.setDescription（”Fizzylifting”）； 
modifyDesc（it， “Scrumdiddlyumptious”）； 
System.out.println（it.getDescription（））； 
System.out.println（it2.getDescription（））； 
} 
} 
What is the outcome of the code？ （）

11. class Payload {  12. private int weight；  13. publi...

单项选择题

11. class Payload { 
12. private int weight； 
13. public Payload（int wt） { weight = wt； } 
13. public void setWeight（mt w） { weight = w； } 
15. public String toString { return Integer.toString（weight）； } 
16. } 
17. 
18. public class TestPayload { 
19. static void changePayload（Payload p） {
20. /* insert code here */
21. } 
22. 
23. public static void main（String[] args） { 
24. Payload p = new Payload（）； 
25. p.setWeight（1024）； 
26. changePayload（p）； 
27. System.out.println（”The value of p is “+ p）； 
28. } 
29. } 
Which statement， placed at line 20， causes the code to print “The value of p is 420.”？（）