从扩展类呼叫

Question

For my project I have to create an abstract class Character and then create a class Player that extends Character. Because class, Character, is abstract I cannot call it to the main and instead I have to call the class Player to the main. My attempt to call the class is in the switch case in AdventureGameV3 which is the main function. Any ideas on how to call it. I have also attached the Weapon class, but it shouldn't be to essential to my question.

import java.util.*;
import java.util.Random;

public abstract class Character {

final int ROGUE_INIT_HP = 55;
final int ROGUE_INIT_STRENGTH = 8;
final int PALADIN_INIT_HP = 35;
final int PALADIN_INIT_STRENGTH = 14;
final int CHAN_INIT_HP = 45;
final int CHAN_INIT_STRENGTH = 10;

private String name;
private int hitPoints;
private int strength;
private int weapon;



public enum Type{ROGUE, PALADIN, JACKIE_CHAN, GOBLIN, SKELETON, WIZARD}

Type cType;

//holds data for each character
public Character(Type cType) {
    this.cType = cType;
    switch(cType){
        case ROGUE:
            this.name="ROGUE";
            this.hitPoints=ROGUE_INIT_HP;
            this.strength=ROGUE_INIT_STRENGTH;
            Weapon weapon1 = new Weapon(name,Weapon.SHORT_SWORD_MIN,Weapon.SHORT_SWORD_MAX);
            this.weapon = weapon1.getDamage();
            break;
        case PALADIN:
            this.name="PALADIN";
            this.hitPoints=PALADIN_INIT_HP;
            this.strength=PALADIN_INIT_STRENGTH;
            Weapon weapon2 = new Weapon(name,Weapon.LONG_SWORD_MIN,Weapon.LONG_SWORD_MAX);
            this.weapon = weapon2.getDamage();
            break;
        case JACKIE_CHAN:
            this.name="JACKIE CHAN";
            this.hitPoints=CHAN_INIT_HP;
            this.strength=CHAN_INIT_STRENGTH;
            Weapon weapon3 = new    Weapon(name,Weapon.JUMP_KICK_MIN,Weapon.JUMP_KICK_MAX);
            this.weapon = weapon3.getDamage();
            break;

    }
}

public String getName()
{
    return name;
}
public int getHitPoints()
{
    return hitPoints;
}
public int getStrength()
{
    return strength;
}
public void setStrength(int strength)
{
    this.strength=strength;
}
public void setWeapon(int weapon)
{
    this.weapon=weapon;
}
public void attack()
{

}
public void increaseHitPoints(int pointIncrease)
{
    hitPoints+=pointIncrease;
}
public void decreaseHitPoints(int pointDecrease)
{
    hitPoints-=pointDecrease;
}
public boolean isDefeated()
{
    if(hitPoints>0)
        return true;
    else
        return false;
}

}

public class Player extends Character{
private int coins;
private String[] Potion;

public Player(Type playerType){
    super(playerType);
    coins=0;
    String[] inventory = new String[5];
}

public void increaseStrength(int strengthIncrease){
    super.setStrength(super.getStrength() + strengthIncrease);
}

public int getCoins(){
    return coins;
}
public int increaseCoins(int coins){
    this.coins+=coins;
}   
public int decreaseCoins(int coins){
    this.coins-=coins;
}

}

  public class AdventureGameV3
    {
    public static void main(String[] args)
{
final int ROGUE_INIT_HP = 55;
final int ROGUE_INIT_STRENGTH = 8;
final int PALADIN_INIT_HP = 35;
final int PALADIN_INIT_STRENGTH = 14;
final int CHAN_INIT_HP = 45;
final int CHAN_INIT_STRENGTH = 10;

final int MINION_INIT_HP = 25;
final int GOBLIN_INIT_STRENGTH = 4;
final int SKELETON_INIT_STRENGTH = 3;

int characterChoice = 0;
Scanner keyboard = new Scanner(System.in);

    System.out.println("\nAdventure Game - Start!\n");
    System.out.println("Here are the characters:");
    System.out.println("1. Rogue\n2. Paladin\n3. Jackie Chan\n");


     System.out.print("Which character do you choose?: ");
     characterChoice = keyboard.nextInt();
     switch(characterChoice){
     case 1:
        Character player = Type(ROGUE);
        break;


     }
      System.out.printf("\nYou chose: %s\n\n", player1);
}

}

Answer 1

Use your Player class.

System.out.println("\nAdventure Game - Start!\n");
System.out.println("Here are the characters:");
System.out.println("1. Rogue\n2. Paladin\n3. Jackie Chan\n");

Player player;
System.out.print("Which character do you choose?: ");
characterChoice = keyboard.nextInt();
switch(characterChoice){
case 1:
   player = new Player(Type.ROGUE);
   break;


}
System.out.printf("\nYou chose: %s\n\n", player);

Answer 2

You're trying to assign a enumeration "Type" to a (abstract) class "Character". This is a type mismatch and results in a compile error.

What you want to do is create a new Player instance.

I advise you to use an integrated development environment (IDE) such as Eclipse, IntelliJ or Netbeans that hint you to compile-time errors and help you find the bugs early on. :)