So I’m doing some coursework about making a little game’s prototype. I have these simple classes (and some others that are not relevant):
abstract class Weapon {
int damage;
int cost;
}
abstract class RangedWeapon extends Weapon {
int range;
int rounds;
}
class ExtraRounds extends Item{
int cost = 20;
int uses = 1;
void use(GameState state){
if (state.currentCharacter.weapon instanceof RangedWeapon){
state.currentCharacter.weapon.rounds += 10;
}
}
}
but when trying to compile this I’m getting
Implementations.java:56: error: cannot find symbol
state.currentCharacter.weapon.rounds += 10;
^
symbol: variable rounds
location: variable weapon of type Weapon
All I want is the class ExtraRounds to check if the weapon is of class RangedWeapon and act accordingly, but I don’t know where things are going wrong. Any help is appreciated
Answer
Your weapon is of a Weapon class. You have to cast it to a RangedWeapon in order to your compiler know it is a RangedWeapon:
if (state.currentCharacter.weapon instanceof RangedWeapon){
((RangedWeapon)state.currentCharacter.weapon).rounds += 10;
}