Question

I can't seem to make my inheritance to work properly between my parent class GameCharacter and the child classes hero and villain.

Here's my code:

import java.sql.SQLOutput;

public class Main {

public static void main(String[] args) {

GameCharacter me = new GameCharacter("King Arthur", 5);
GameCharacter tree = new GameCharacter("Tall Tree", 5);
GameCharacter enemy = new GameCharacter("Monster Bug", 10);

System.out.println();
System.out.println("\n~~~ Game Characters Created ~~~");
System.out.println(tree);
System.out.println(me);
System.out.println(enemy);

System.out.println("\n~~~ The Bug Has Been Attacked ~~~");
me.attack(enemy);
System.out.println(tree);
System.out.println(me);
System.out.println(enemy);

System.out.println("\n~~~ The Bug Assists Itself ~~~");
enemy.assist(enemy);
System.out.println(tree);
System.out.println(me);
System.out.println(enemy);

System.out.println("\n~~~ Everybody Rests ~~~");
tree.rest();
enemy.rest();
me.rest();
System.out.println(tree);
System.out.println(me);
System.out.println(enemy);
}
}

import java.util.Objects;
import java.util.Random;

public class GameCharacter {

protected String mName;
protected int mLevel;
protected int mHealthPoints;
protected int mMagic;
protected int mGold;

public GameCharacter(String name) {
this(name, 1);
}

public GameCharacter(String name, int level) {
mName = name;
mLevel = level;
mHealthPoints = 100 * mLevel;
mMagic = 100 * mLevel;
mGold = 100 * mLevel;
}

public String getName() {

return mName;
}

public int getLevel() {

return mLevel;
}

public int getHealthPoints() {

return mHealthPoints;
}

public int getMagic() {

return mMagic;
}

public int getGold() {

return mGold;
}

public void setName(String name) {

mName = name;
}

@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
GameCharacter that = (GameCharacter) o;
return mLevel == that.mLevel &&
mHealthPoints == that.mHealthPoints &&
mMagic == that.mMagic &&
mGold == that.mGold &&
mName.equals(that.mName);
}

@Override
public int hashCode() {

return Objects.hash(mName, mLevel, mHealthPoints, mMagic, mGold);
}

@Override
public String toString() {
return "GameCharacter{" +
"Name ='" + mName + '\'' +
", Level = " + mLevel +
", Health Points = " + mHealthPoints +
", Magic = " + mMagic +
", Gold = " + mGold +
'}';
}

public void attack(GameCharacter other) {

System.out.println(mName + " does not attack. I'm peaceful :)");
}

public void assist(GameCharacter other) {

System.out.println(mName + " cannot assist");
}

public void rest() {

System.out.println(mName + " never rests!");
}
}

import java.util.Random;

public class Hero extends GameCharacter {

public Hero(String name) {

super(name);
}

public Hero(String name, int level) {

super(name, level);
}

@Override
public void attack(GameCharacter other) {

Random rng = new Random();

int roll = rng.nextInt(10);

int damage = roll * this.mLevel;

other.mHealthPoints -= damage;

if (other.mHealthPoints < 0)
other.mHealthPoints = 0;
}

@Override
public void assist(GameCharacter other) {

Random rng = new Random();
int roll = rng.nextInt(5);

switch (roll) {

case 0:
other.mHealthPoints += 5 * this.mLevel;
this.mHealthPoints -= 5 * this.mLevel;
break;

case 1:
other.mMagic += 5 * this.mLevel;
this.mMagic -= 5 * this.mLevel;
break;

case 2:
other.mGold += 5 * this.mLevel;
this.mGold -= 5 * this.mLevel;
break;

case 3:
other.mLevel++;
other.mGold += 100;
other.mHealthPoints += 100;
other.mMagic += 100;
this.mLevel--;
this.mGold -= 100;
this.mHealthPoints -= 100;
this.mMagic -= 100;

case 4:
other.mHealthPoints += 100 * mLevel;
this.mHealthPoints += 100 * mLevel;
break;
}
}

@Override
public void rest() {

Random rng = new Random();
int roll = rng.nextInt(2);
int health = rng.nextInt(6) + 25;

if (roll == 0 || roll == 1) {
mHealthPoints += health;
}
}

public void perish(){

System.out.println("All is lost, our hero has perished :(");
}
}

import java.util.Random;

public class Villain extends GameCharacter {

public Villain(String name) {

super(name);
}

public Villain(String name, int level) {

super(name, level);
}

@Override
public void attack(GameCharacter other) {

Random rng = new Random();

int roll = rng.nextInt(10);

int damage = roll * this.mLevel;

other.mHealthPoints -= damage;

if (other.mHealthPoints < 0)
other.mHealthPoints = 0;
}

  
@Override
public void assist(GameCharacter other) {

Random rng = new Random();
int roll = rng.nextInt(5);

switch (roll) {

case 0:
other.mHealthPoints += 5 * this.mLevel;
this.mHealthPoints -= 5 * this.mLevel;
break;

case 1:
other.mMagic += 5 * this.mLevel;
this.mMagic -= 5 * this.mLevel;
break;

case 2:
other.mGold += 5 * this.mLevel;
this.mGold -= 5 * this.mLevel;
break;

case 3:
other.mLevel++;
other.mGold += 100;
other.mHealthPoints += 100;
other.mMagic += 100;
this.mLevel--;
this.mGold -= 100;
this.mHealthPoints -= 100;
this.mMagic -= 100;

case 4:
other.mHealthPoints += 100 * mLevel;
this.mHealthPoints += 100 * mLevel;
break;
}
}

@Override
public void rest() {

System.out.println("Villains never rest! Are you kidding me? We have too many nefarious things to do!");
}

public void perish(){

System.out.println("Humanity has been restored! The villain has perished.");
}
}

Answer 1

Please check the comments in the program for details...

/***********************************Main.java*****************************/

public class Main {

   public static void main(String[] args) {

       /*
       * change here to achieve polymorphic behavior of objects You need to create
       * subclass type object and assign to superclass reference if you want to call
       * specific sub class method then down cast that object
       */
       GameCharacter me = new Hero("King Arthur", 5);
       GameCharacter tree = new GameCharacter("Tall Tree", 5);
       GameCharacter enemy = new Villain("Monster Bug", 10);

       System.out.println();
       System.out.println("\n~~~ Game Characters Created ~~~");
       System.out.println(tree);
       System.out.println(me);
       System.out.println(enemy);

       System.out.println("\n~~~ The Bug Has Been Attacked ~~~");
       me.attack(enemy);
       System.out.println(tree);
       System.out.println(me);
       System.out.println(enemy);

       System.out.println("\n~~~ The Bug Assists Itself ~~~");
       enemy.assist(enemy);
       System.out.println(tree);
       System.out.println(me);
       System.out.println(enemy);

       System.out.println("\n~~~ Everybody Rests ~~~");
       tree.rest();
       enemy.rest();
       me.rest();
       System.out.println(tree);
       System.out.println(me);
       System.out.println(enemy);
   }
}

/**************************output****************************/

~~~ Game Characters Created ~~~
GameCharacter{Name ='Tall Tree', Level = 5, Health Points = 500, Magic = 500, Gold = 500}
GameCharacter{Name ='King Arthur', Level = 5, Health Points = 500, Magic = 500, Gold = 500}
GameCharacter{Name ='Monster Bug', Level = 10, Health Points = 1000, Magic = 1000, Gold = 1000}

~~~ The Bug Has Been Attacked ~~~
GameCharacter{Name ='Tall Tree', Level = 5, Health Points = 500, Magic = 500, Gold = 500}
GameCharacter{Name ='King Arthur', Level = 5, Health Points = 500, Magic = 500, Gold = 500}
GameCharacter{Name ='Monster Bug', Level = 10, Health Points = 970, Magic = 1000, Gold = 1000}

~~~ The Bug Assists Itself ~~~
GameCharacter{Name ='Tall Tree', Level = 5, Health Points = 500, Magic = 500, Gold = 500}
GameCharacter{Name ='King Arthur', Level = 5, Health Points = 500, Magic = 500, Gold = 500}
GameCharacter{Name ='Monster Bug', Level = 10, Health Points = 2970, Magic = 1000, Gold = 1000}

~~~ Everybody Rests ~~~
Tall Tree never rests!
Villains never rest! Are you kidding me? We have too many nefarious things to do!
GameCharacter{Name ='Tall Tree', Level = 5, Health Points = 500, Magic = 500, Gold = 500}
GameCharacter{Name ='King Arthur', Level = 5, Health Points = 525, Magic = 500, Gold = 500}
GameCharacter{Name ='Monster Bug', Level = 10, Health Points = 2970, Magic = 1000, Gold = 1000}

Please let me know if you have any doubt or modify the answer, Thanks :)