Getter 和 Setter / 從其他類訪問變量

Question

我有兩個類 Player 和 menuState，這取決於播放器中的變量 class 命名為“模型”，播放器的 model 發生變化。 現在我想通過菜單中的按鈕更改 model 但我無法弄清楚如何在不創建新播放器 object 的情況下從 menuState 訪問“模型”變量。

我的播放器 class：

package entitys;

import State.State;
import data.Handler;
import grafik.Animation;
import grafik.Assets;


import java.awt.*;

public class Player extends Creature {

private Animation playerWalkLeft;
private Animation playerWalkRight;
private Animation playerIdle;
private int model = 1;
public Player(Handler handler, float x, float y) {
    super(handler, x, y, Creature.DEFAULT_CREATURE_WIDTH, 112);

    bounds.x = 6;
    bounds.y = 52;
    bounds.width = 52;
    bounds.height = 64;


    if (model == 1) {
        playerWalkLeft = new Animation(6,Assets.fairy_run[0],Assets.fairy_run[1],Assets.fairy_run[2],Assets.fairy_run[3]);
        playerWalkRight = new Animation(6,Assets.fairy_run[0],Assets.fairy_run[1],Assets.fairy_run[2],Assets.fairy_run[3]);
        playerIdle = new Animation(10,Assets.fairy_idle[0],Assets.fairy_idle[1],Assets.fairy_idle[2],Assets.fairy_idle[3]);
    }else if (model == 2) {
        playerWalkLeft = new Animation(6, Assets.dragon_run[0], Assets.dragon_run[1], Assets.dragon_run[2], Assets.dragon_run[3]);
        playerWalkRight = new Animation(6, Assets.dragon_run[0], Assets.dragon_run[1], Assets.dragon_run[2], Assets.dragon_run[3]);
        playerIdle = new Animation(10, Assets.dragon_idle[0], Assets.dragon_idle[1], Assets.dragon_idle[2], Assets.dragon_idle[3]);
    }else if (model == 3) {
        playerWalkLeft = new Animation(6, Assets.wizzard_run[0], Assets.wizzard_run[1], Assets.wizzard_run[2], Assets.wizzard_run[3]);
        playerWalkRight = new Animation(6, Assets.wizzard_run[0], Assets.wizzard_run[1], Assets.wizzard_run[2], Assets.wizzard_run[3]);
        playerIdle = new Animation(10, Assets.wizzard_idle[0], Assets.wizzard_idle[1], Assets.wizzard_idle[2], Assets.wizzard_idle[3]);
    } else if (model == 4){
        playerWalkLeft = new Animation(6, Assets.knight_run[0], Assets.knight_run[1], Assets.knight_run[2], Assets.knight_run[3]);
        playerWalkRight = new Animation(6, Assets.knight_run[0], Assets.knight_run[1], Assets.knight_run[2], Assets.knight_run[3]);
        playerIdle = new Animation(10, Assets.knight_idle[0], Assets.knight_idle[1], Assets.knight_idle[2], Assets.knight_idle[3]);
    }

}



@Override
public void tick() {
    getInput();
    move();

    handler.getCamera().centerOnEntity(this);
    playerWalkRight.runAnimation();
    playerIdle.runAnimation();
    playerWalkLeft.runAnimation();
}

private void getInput() {
    xMove = 0;
    yMove = 0;

    if (handler.getKeyManager().up)
        yMove = -speed;
    if (handler.getKeyManager().down)
        yMove = speed;
    if (handler.getKeyManager().left)
        xMove = -speed;
    if (handler.getKeyManager().right)
        xMove = speed;
    if (handler.getKeyManager().escape)
        State.setState(handler.getGame().menuState);
}

@Override
public void render(Graphics g) {
    if(xMove >0) {
        playerWalkRight.drawAnimation(g,(int) (x - handler.getCamera().getxOffset()), (int) (y - handler.getCamera().getyOffset()), width, 112);
    }
    else if(xMove<0){
        playerWalkLeft.drawAnimation(g,(int) (x - handler.getCamera().getxOffset()), (int) (y - handler.getCamera().getyOffset()), width, 112);

    }
    else {
        playerIdle.drawAnimation(g,(int) (x - handler.getCamera().getxOffset()), (int) (y - handler.getCamera().getyOffset()), width, 112);

    }
    if (handler.getKeyManager().debug) {
        g.setColor(Color.red);
        g.drawRect((int) (x + bounds.x - handler.getCamera().getxOffset()),
                (int) (y + bounds.y - handler.getCamera().getyOffset()),
                bounds.width, bounds.height);
    }
}

public int getModel() {
    return model;
}

public void setModel(int model) {
    this.model = model;
}

}

我的菜單狀態 class：

package State;

import data.Handler;
import grafik.Assets;
import ui.ClickListener;
import ui.UIImageButton;
import ui.UIManager;
import entitys.Player;

import java.awt.*;

public class MenuState extends State {

private UIManager uiManager;

public MenuState(Handler handler) {
    super(handler);
    uiManager = new UIManager(handler);
    handler.getMouseManager().setUiManager(uiManager);



    uiManager.addObject(new UIImageButton(144, 286, 64, 128, Assets.btn_dragon, new ClickListener() {
    @Override
    public void onClick(){
        State.setState(handler.getGame().gameState);
        //p.setModel(2);
    }
    }));

    uiManager.addObject(new UIImageButton(464, 286, 64, 128, Assets.btn_wizzard, new ClickListener() {
        @Override
        public void onClick(){
            State.setState(handler.getGame().gameState);
            //p.setModel(3);
        }
    }));

    uiManager.addObject(new UIImageButton(784, 286, 64, 128, Assets.btn_knight, new ClickListener() {
        @Override
        public void onClick(){
            State.setState(handler.getGame().gameState);
            //p.setModel(4);
        }
    }));
    uiManager.addObject(new UIImageButton(1104, 286, 64, 128, Assets.btn_fairy, new ClickListener() {
        @Override
        public void onClick(){
            State.setState(handler.getGame().gameState);
            //p.setModel(1);

        }
    }));


}


@Override
public void tick() {
    uiManager.tick();
}

@Override
public void render(Graphics g) {
    uiManager.render(g);
}

}

提前致謝

Answer 1

You could make the model field in the MenuState class and change its value on click, instead of model field in Player class if you don't want it linked to a specific player instance, that is the simplest solution. 讓我知道這是否有幫助。

Answer 2

如果 model Integer 未綁定到特定播放器 object，那么只需將其更改為 ZA81259CEF856559C297ZD1 變量。 如果沒有，您需要播放器 Object，方法是創建它或將其保存在 Map 之類的東西中。