Question

我对代码很陌生，目前正在制作我的第一个项目（只是一个简单的游戏），这里是一些代码的快照。起来了。向下，向左和向右按钮工作得很好，但行＆＃39;鼠标=新点（e.getX（），e.getY（）， - 25）;＆＃39;尽管放入了公共点鼠标，但似乎没有找到鼠标的坐标;＆＃39;。有什么建议吗？

public Rectangle character;

public int charW = 24;
public int charH = 36;

public boolean right = false;
public boolean left = false;
public boolean up = false;
public boolean down = false;
public boolean mouseActive = false;

/**
 *
 */
public Point mouse;

public Keying(Display f, Images i){
    character = new Rectangle(180, 180, charW, charH); 

    f.addKeyListener(new KeyAdapter(){
        public void keyPressed(KeyEvent e){
            if(e.getKeyCode() == KeyEvent.VK_D){
                mouseActive = false;
                right = true;
                character.x += 1;
            }
            if(e.getKeyCode() == KeyEvent.VK_A){
                mouseActive = false;
                left = true;
                character.x -= 1;
            }
            if(e.getKeyCode() == KeyEvent.VK_W){
                mouseActive = false;
                up = true;
                character.y -= 1;
            }
            if(e.getKeyCode() == KeyEvent.VK_S){
                mouseActive = false;
                down = true;
                character.y += 1;
            }
            if(e.getKeyCode() == KeyEvent.VK_M){
                mouseActive = true;
            }
        }

        public void keyReleased(KeyEvent e){
            if(e.getKeyCode() == KeyEvent.VK_D){
                right = false;
            }
            if(e.getKeyCode() == KeyEvent.VK_A){
                left = false;
            }
            if(e.getKeyCode() == KeyEvent.VK_W){
                up = false;
            }
            if(e.getKeyCode() == KeyEvent.VK_S){
                down = false;
            }
        }
    });

    f.addMouseMotionListener(new MouseMotionAdapter() {

        public void mouseMoved(MouseEvent e){
            mouse = new Point(e.getX(), e.getY(), -25);
            if(mouseActive){
                character.x = mouse.x;
                character.y = mouse.y;
            }
            repaint();
        }           
    });
}    

public void paintComponent(Graphics g){
    super.paintComponent(g);
    this.setBackground(Color.BLACK);
    g.setColor(Color.RED);
    g.fillRect(character.x, character.y, character.width, character.height);

    if(right){
        character.x += 1;
    }
    if(left){
        character.x -= 1;
    }
    if(up){
        character.y -= 1;
    }
    if(down){
        character.y += 1;
    }
    repaint();
}

Answer 1

MouseEvent对象有一个名为getPoint()的方法。这样您就可以获得精确的Point，而不必创建具有X和Y值的新值。{/ p>

因此，请尝试更改该行：

mouse = new Point(e.getX(), e.getY(), -25);

以下内容：

mouse = e.getPoint();

所有这些信息都可以在MouseEvent here

的JavaDoc中找到

Answer 2

我自己设法做到了，但如果有人想知道我做了什么，这就是我使用的代码行 -

    public void mouseMoved(MouseEvent e){
            int mouseX = e.getX();
            int mouseY = e.getY();
            mouse = new Point(mouseX, mouseY);

找不到鼠标的坐标

2 个答案: