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？（）

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？ （）

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.”？（）