Java programming (CSC1016S)

What advantages do political parties have when they are using cyber campaigns 

Vehicle registrations have a natural alpha numeric ordering e.g. the registrations CA 976543, CDS791 MP, CHZ897 L are in order. It makes sense to be able to obtain this ordering when working with a set of registrations. For example, test 5 obtains the set of registrations for all vehicles observed. It would be easier to check the results if they were output in order. The java.util.Collections class provides a method that can be used on lists that is called "sort". We'd like test 5 to do something like this: 

/* * Test Five: check the Observations "getVehicles" method works. 
*/ System.out.println("Testing to see the registrations of all the vehicles that have been observed."); 
List result = observations.getVehicles(); 
// Print them in order so can easily check result. 
Collections.sort(list); 
System.out.println("The result is "+list); 
System.out.println("(should be "+VEHICLES_USED+")");

 The sort method operates on objects that are Comparable. Solve this problem by ensuring the Registration class implements the java.lang.Comparable interface, and then replace the existing test 5 with the above code.

public class Registration  {
   private final Province province;
   private final String identifier;
   public Registration(final String identifier) throws IllegalArgumentException {
      this.province = Province.identifyProvince(identifier);
      this.identifier = identifier;
   }
   public Province getProvince() { 
      return this.province; }
   public String getIdentifier() { 
      return this.identifier; }
   public static boolean isValid(final String regIdentifier) { 
      try {
         Province province = Province.identifyProvince(regIdentifier);
         return true;}
      catch (IllegalArgumentException illExcep) {
         return false;}}
  

Currently the tests do not produce the correct results. Can you fix the problem by judiciously adding methods to the Registration class? Hint: The issue concerns overriding methods from the Object class to ensure correct printing and correctly testing for object equivalence.

public class Registration {//implements Comparable<Registration> {

   private final Province province;
   private final String identifier;
   
   /**
    * Create a Registration object from a string of suitable format.
    * @param code a String representing a vehicle registration.
    * @throws IllegalArgument exception if code does not represent a valid registration.
    */
   public Registration(final String identifier) throws IllegalArgumentException {
      this.province = Province.identifyProvince(identifier);
      this.identifier = identifier;
   }
   
   public Province getProvince() { 
      return this.province; }
   public String getIdentifier() { 
      return this.identifier; }
   
	/**
	* Determine whether the given string is a valid registration identifier.
	*/
   public static boolean isValid(final String regIdentifier) { 
      try {
         Province province = Province.identifyProvince(regIdentifier);
         return true;
      }
      catch (IllegalArgumentException illExcep) {
         return false;   
      }
   }

can I get the hashCode() override method as well?

Currently the tests do not produce the correct results. Can you fix the problem by judiciously adding methods to the Registration class? Hint: The issue concerns overriding methods from the Object class to ensure correct printing and correctly testing for object equivalence.

public class Registration {//implements Comparable<Registration> {

   private final Province province;
   private final String identifier;
   
   /**
    * Create a Registration object from a string of suitable format.
    * @param code a String representing a vehicle registration.
    * @throws IllegalArgument exception if code does not represent a valid registration.
    */
   public Registration(final String identifier) throws IllegalArgumentException {
      this.province = Province.identifyProvince(identifier);
      this.identifier = identifier;
   }
   
   public Province getProvince() { 
      return this.province; }
   public String getIdentifier() { 
      return this.identifier; }
   
	/**
	* Determine whether the given string is a valid registration identifier.
	*/
   public static boolean isValid(final String regIdentifier) { 
      try {
         Province province = Province.identifyProvince(regIdentifier);
         return true;
      }
      catch (IllegalArgumentException illExcep) {
         return false;   
      }
   }

Write a program to manage a set of graphical objects based on the commands in a specified file. This is a graphical equivalent of the famous edlin tool for text manipulation. On the Amathuba page of the assignment, you will find VectorGraphics and Question2 classes that will handle the file I/O for you. When you run Question2, specify the file name like this: java Question2 myfile.in Each line of the file contains an instruction in one of the formats given below: a rectangle a hline a vline a ptline w d m x Explanation: ‘a’ adds an object of a particular type (rectangle/hline/vline/ptline) with the specified parameters. ‘w’ renders/draws the objects and prints the composite image to the screen. ‘d’ deletes an object based on its id.‘m’ moves an object to a new position based on its id. ‘x’ exits the program. Note: • A 'ptline' differs from the other objects in that the values after the object type are not lengths, but instead a second point described by x1 and y1. This object represents a line from (x, y) to (x1, y1). • The answers the automatic marker expects were generated using an implementation of Bresenham's Line Drawing Algorithm. (See the appendix). • Assume that the drawing canvas is 20 blocks wide (in the x direction) and 20 blocks high in the y direction), starting with (0,0) in the top left. As mentioned before, you are given class that will serve as the framework for this program on the Amathuba page, including the main class that does the input and output. You are only required to create the Rectangle, HLine, VLine and PtLine subclasses of the given VectorObject base class. You should add comments to all classes you write. Sample Input File a 1 5 5 rectangle 10 10 a 2 3 3 hline 14 a 3 3 16 hline 14 a 4 3 3 vline 14 a 5 16 3 vline 14 w d 1 m 2 3 5 m 3 3 14 m 4 5 3 m 5 14 3 a 6 6 6 ptline 13 13 a 6 13 6 ptline 6 13 w

Java code please.