java - 为什么这不能是静态的？

package com.evansgame.newproject.fps;
import java.util.concurrent.locks.ReentrantLock;
import java.util.*;
abstract class Weapon{
  int weaponID;//why can't this be static?
  DrawMe drawMe;//why can't this be static?
  int itemID;
  float x;
  float y;
  float z;
  static ReentrantLock weaponsLock = new ReentrantLock();
  static LinkedList<Weapon> weapons = new LinkedList<>();
  boolean active = true;
  Weapon(int itemID, float x, float y, float z){
    this.itemID = itemID;
    this.x = x;
    this.y = y;
    this.z = z;
  }
  static class Bazoooka extends Weapon{
    static final int WEAPON_ID = 0;
    static final DrawMe bazoookaDrawMe = DrawMe.colorClone(DrawMe.loadModel("bazoooka"),0,.1f,.8f,1,0,.2f);
    Bazoooka(int itemID, float x, float y, float z){
      super(itemID,x,y,z);
      drawMe = bazoookaDrawMe;//same across all Bazoookas
      weaponID = 0;//same across all Bazoookas
    }
  }
}

所有Bazoooka实例中的变量robotID和drawMe均应相同。当我访问Weapon的实例时，无论碰巧是哪种类型的武器，我都需要武器ID和DrawMe。感觉这些变量是静态的，为什么我必须为其使用实例变量？

最佳答案

您可以使用getter代替字段：

abstract class Weapon {
    abstract int getID();
    abstract DrawMe getDrawMe();
    ...
}

然后在Bazooka类中，您只需重写以下方法：

static final int WEAPON_ID = 0;
static final DrawMe bazoookaDrawMe = DrawMe.colorClone(DrawMe.loadModel("bazoooka"),0,.1f,.8f,1,0,.2f);

@Override
int getID() {
    return WEAPON_ID;
}

@Override
DrawMe getDrawMe() {
    return bazoookaDrawMe;
}

关于java - 为什么这不能是静态的？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/41507780/