我试图让键输入工作通过获取和设置X/Y值，但它不工作

Question

我知道图像不断变化，但X/Y坐标不会改变，不让图像移动。为什么是这种情况的发生和我能做些什么来解决它

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); 
    } 
} 

播放器类

来检查按键输入

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); 
    } 

} 

键输入类。我试着去得到它获取当前XY值，加/减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 
    } 
} 
} 

我知道程序越来越键盘输入（箭头键），因为按一个键就当设置在播放器类的XY值将键码显示在控制台中，但不会将xy值设置为新的xy值以便移动。我只有代码完成向上箭头键，因为我想确保它在复制粘贴之前工作。

Answer 1

您必须先登录2 Player。 Player player = new Player(1440/2 - 14, 810/2 - 14);和player = new Player(playerX, playerY);。

我会说，你正在编辑一个玩家并打印另一个玩家。尝试添加以下内容：

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