Using configured settings within your plugin

The current EventHandler method of the MobEnhancer plugin sets the health of zombies to 40, where the number 40 is hardcoded. This means that the value of 40 is a part of the code itself, and this cannot be changed after the code is compiled. We wish to make this value softcoded, that is, we want to retrieve the value from an external source, which is config.yml in our case:

Currently, the onMobSpawn method is as follows:

@EventHandler
public void onMobSpawn(CreatureSpawnEvent event) {
    if (event.getEntityType() == EntityType.ZOMBIE) {
        int health = 40;
        event.getEntity().setMaxHealth(health);
        event.getEntity().setHealth(health);
    }
}

We will work from this existing code. The if statement is no longer needed, because we don't want to limit the plugin to zombies only. As discussed earlier, we also want to replace the hardcoded 40 value with a double value, which will be read from the config file. Therefore, 40 should...