CSIT121 Study Guide - Quiz Guide: Oxford University Press

(b) Consider the following classes: public class House - ي شما هر چند = = private String rooms; public House() String rooms - new String [31; rooms (0) - "living room"; rooms [1] - "kitchen"; rooms (2) - "bedroom"; = public void print RoomList () for (int i-0; i < rooms.length; i++) { System.out.println (rooms[1]); = ہم نوا شهيد - public class Block يا نو public static void main(String[args) له House myblouse - new House(); myHouse.print RoomList(); د ه د The program compiles, but when you run the program, you get the following exception: Exception in thread "main" java.lang.NullPointerException at House.print RoomList (House.java:12) at Block.main (Block.java:6) The point of the method printRoomList is to print all the Strings in the house to the screen. Why does it give the error and write the code to fix the error while successfully printing all the rooms to the screen?

(0) public class ReferenceTest 6 public static void methodSix (int) 1 x){ x[0] = new int [2]; x[0][0] = 0; x(01 (1) = 1; x = new int [10] [5); x[0] (3) = 3; public static void main(String[] args) { int[] O Y = [ {1,2,3}, {2,4}}; methodSix (y); //WHAT ARE THE VALUES IN THE ARRAY OF ARRAYS //REFERRED TO BY Y AT THIS POINT? (ANSWER IN CHART)