Question

In Java. Modify the attached GameDriver2 to read characters in from a text file rather than the user. You should use appropriate exception handling when reading from the file. The text file that you will read is provided.

-------------------- Modify GaveDriver2.java --------------------

-----GameDriver2.java -----

import java.io.File;
import java.util.ArrayList;
import java.util.Scanner;

/**
* Class: GameDriver
*
* This class provides the main method for Homework 2 which reads in a
* series of Wizards, Soldier and Civilian information from the user
* and creates the objects
*
*/
public class GameDriver2
{

/**
* Main method- Starting point of program
*
* @param args
*/
public static void main(String[] args)
{

// create needed variables
ArrayList characters = new ArrayList();

// YOU CHANGE THIS LINE to opening file Characters.txt - use appropriate exception handling
// don't
// just throw the exception
Scanner in = new Scanner(System.in);

// End first change

// HERE IS CODE THAT READS A LINE AND CREATES APPROPRIATE CHARACTER

while (in.hasNextLine())
{
// read in a line and parse into various attributes
String line = in.nextLine();

// parse based on comma
String[] data = line.split(", ");
String type = data[0];
String name = data[1];
int strength = Integer.parseInt(data[2]);
String weapon = data[3];
int magic = Integer.parseInt(data[4]);
  
// use this data to build appropriate GameCharacter based on type and add to ArrayList
// YOU ADD THIS CODE

}
// print array before hits or healing
for (GameCharacter g : characters)
{
System.out.println(g);
}

System.out.println();
System.out.println("After soldier takes a hit and civilian is healed");

// print contents of arrayList
for (int i = 0; i < characters.size(); i++)
{
GameCharacter g = characters.get(i);
// if a civilian - heal them
if (g instanceof Civilian)
{
g.heal(5);
}
// else if a soldier - takes a hit
else if (g instanceof Soldier)
{
g.takeHit(5);
}

System.out.println(g);
}

}

}

----- GameCharacter.java -----

  

/**
* Class: GameCharacter
*
* This class provides a parent class for characters to be created for
* our game.
*
*/
public class GameCharacter {
   // attributes for all GameCharacters
   private String name;
   private int strength;

   /**
   * Name Setter
   *
   * @param name the name to set
   */
   public void setName(String name) {
       this.name = name;
   }

   /**
   * Strength setter method
   *
   * Makes sure strength is a legit value. Ignores otherwise
   *
   * @param strength the strength to set
   */
   public void setStrength(int strength) {
       if (strength > 0 && strength <= 18) {
           this.strength = strength;
       } else {
           this.strength = 12; // default number I made up
       }
   }

   /**
   * All arg constructor
   *
   * @param name
   * @param strength
   */
   public GameCharacter(String name, int strength) {
       super();
       this.name = name;
       setStrength(strength);
   }

   /**
   * No-arg (default) constructor
   */
   public GameCharacter() {
       this.strength = 15;
       this.name = "TBD";
   }

   /**
   * Getter method for name
   *
   * @return the name
   */
   public String getName() {
       return name;
   }

   /**
   * Getter method for strength
   *
   * @return the strength
   */
   public int getStrength() {
       return strength;
   }

   /**
   * method: takeHit() Method called when character is attacked and has lost
   * strength
   *
   * @param int amount
   */
   public void takeHit(int amount) {
       strength = strength - amount;
       if (strength < 0) {
           strength = 0;
       }
   }

   /**
   * Method: heal()
   *
   * Method called as character heals from a hit
   *
   * @param int amount
   *
   */
   public void heal(int amount) {
       strength = strength + amount;
       if (strength > 18) {
           strength = 18;
       }
   }

}

----- Characters.txt -----

Soldier, Sol, 14, Sword, 50
Wizard, Wiz, 5, Staff, 444
Civilian, Civ, 18, Words, 3
Soldier, Joe, 3, Gun, 0
Wizard, Gandalf, 10, Wand, 500
Civilian, Frodo, 16, Money, 40

I can provide the 3 child classes (Soldier, Wizard, Civilian) if needed as the code exceed the text limits.

Answer 1

import java.io.File;
import java.util.ArrayList;
import java.util.Scanner;
import game.GameCharacter;
import java.io.BufferedReader;
import java.io.File;  
import java.io.FileNotFoundException;  
import java.io.FileReader;
import java.io.IOException;

public class GameDriver2
{


public static void main(String[] args) throws IOException
{


ArrayList<GameCharacter> characters = new ArrayList<>();

 File file = null;
FileReader fr=null;
BufferedReader br=null;
try
{
    file = new File("C:\\Users\\Gaurang\\Desktop\\Characters.txt");
    fr = new FileReader(file);
    br=new BufferedReader(fr);
    String line;
        while ((line=br.readLine())!=null)
            {
            
            

                    // parse based on comma
                    String[] data = line.split(", ");
                    String type = data[0];
                    String name = data[1];
                    int strength = Integer.parseInt(data[2]);
                    String weapon = data[3];
                    int magic = Integer.parseInt(data[4]);

                    // use this data to build appropriate GameCharacter based on type and add to ArrayList
                    // YOU ADD THIS CODE
                    if(type=="Soldier")
                    {
                            Soldier soldier = new Soldier(name,strength);
                            characters.add(soldier);
                    }
                    else if(type=="Civilian")
                    {
                            Civilian civ = new Civilian(name,strength);
                            characters.add(civ);
                    }
                    else if(type=="Wizard")
                    {
                        Wizard wiz = new Wizard(name,strength);
                        characters.add(wiz);

                    }
    
            }
}

catch(FileNotFoundException  exc)
        {
            
           if(!file.exists())
           {
               System.out.println("The Given File Does Not Exists");
           }
        }

finally
{
    fr.close();
    br.close();
}





 //print array before hits or healing
for (GameCharacter g : characters)
{
System.out.println(g);
}

System.out.println();
System.out.println("After soldier takes a hit and civilian is healed");

// print contents of arrayList
for (int i = 0; i < characters.size(); i++)
{
GameCharacter g = characters.get(i);
// if a civilian - heal them
if (g instanceof Civilian)
{
g.heal(5);
}
// else if a soldier - takes a hit
else if (g instanceof Soldier)
{
g.takeHit(5);
}

System.out.println(g);
}

}

}