我試圖讓鍵輸入工作通過獲取和設置X/Y值，但它不工作

Question

我知道圖像不斷變化，但X/Y座標不會改變，不讓圖像移動。爲什麼是這種情況的發生和我能做些什麼來解決它

import java.awt.*; 


public class GameState extends State { 

    private Player player; 
    private int playerX = 1440/2 - 14, playerY = 810/2 - 14; 

    public GameState(SuperHexagonGame game) 
    { 
    super(game); 
    player = new Player(playerX, playerY); 
    } 



    public void tick() 
    { 
    player.tick(); 
    } 

    public Player getPlayer() 
    { 
    return player; 
    } 

    public void render(Graphics g) 
    { 
    g.drawImage(Assets.bg1, 0, 0, null); 
    player.render(g); 
    } 
} 

播放器類

來檢查按鍵輸入

import java.awt.*; 


public class Player extends Creature { 

    public Player(int x, int y) 
    { 
    super(x, y); 
    } 

    public void tick() 
    { 
    } 

    public int getX() 
    { 
    return x; 
    } 
    public int getY() 
    { 
    return y; 
    } 
    public void setX(int x) 
    { 
    this.x = x; 
    } 
    public void setY(int y) 
    { 
    this.y = y; 
    } 

    public void render(Graphics g) 
    { 
    System.out.println(y); 
    g.drawImage(Assets.player1, x, y, null); 
    } 

} 

鍵輸入類。我試着去得到它獲取當前XY值，加/減75

import java.awt.event.*; 

public class KeyInput extends KeyAdapter { 
    private Player player = new Player(1440/2 - 14, 810/2 - 14); 
public void keyPressed(KeyEvent e) 
{ 
    int key = e.getKeyCode(); 
    System.out.println(key); 

    if (key == KeyEvent.VK_UP) 
    { 
    //decrement y by 75 
    player.setY(player.getY() - 75); 
    } 
    if (key == KeyEvent.VK_DOWN) 
    { 
    //increment y by 75 
    } 
    if (key == KeyEvent.VK_LEFT) 
    { 
    //decrement x by 75 
    } 
    if (key == KeyEvent.VK_RIGHT) 
    { 
    //increment x by 75 
    } 
} 
} 

我知道程序越來越鍵盤輸入（箭頭鍵），因爲按一個鍵就當設置在播放器類的XY值將鍵碼顯示在控制檯中，但不會將xy值設置爲新的xy值以便移動。我只有代碼完成向上箭頭鍵，因爲我想確保它在複製粘貼之前工作。

Answer 1

您必須先登錄2 Player。 Player player = new Player(1440/2 - 14, 810/2 - 14);和player = new Player(playerX, playerY);。

我會說，你正在編輯一個玩家並打印另一個玩家。嘗試添加以下內容：

public class KeyInput extends KeyAdapter { 
    private Player player; 
    public KeyInput (Player player){ 
     this.player = player;  
    } 
}