public class Player
{
    private int energy;
    public Player(){
        this.energy =100;  
    }
    public void walk(){       
        this.energy-=5;    
    }
    public void check(){
        System.out.println("体力:"+this.energy);
    }
    public boolean isAlive(){
        return this.energy>0;
    }
    public void eat(Food food){
        this.energy-=food.getEnergy();
        System.out.println("体力："+this.energy);
    }
}