试图用箭头键和WASD同时移动两个对象

Question

嘿，我正在制作一个游戏，其中可以用wasd and arrow键移动角色。我让他们移动，但我不能同时让他们移动。一个人不能移动另一个形状。有没有办法检查WASD并同时按下箭头？希望你们能提供帮助。预先感谢。

这是代码：

// The "SoccerGame" class.
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
public class SoccerGame extends Applet implements KeyListener
{
    //x and y values of the player 1 and 2's character and the ball
    int x1 = 0, y1 = 275, x2 = 780, y2 = 275, xBall = 400, yBall = 275;
    public void init ()
    {
        this.requestFocus ();
        addKeyListener (this);
        //setting size of program
        setSize (800, 550);
    } // init method

    public void paint (Graphics g)
    {
        //Player 1
        g.setColor (Color.red);
        g.fillRect (x1, y1, 30, 30);
        //Player2
        g.setColor (Color.black);
        g.fillRect (x2, y2, 30, 30);
        //Ball
        g.setColor (Color.blue);
        g.fillRect (xBall, yBall, 30, 30);
    } // paint method

    public void keyPressed (KeyEvent e)
    {
        //Moving Player 1 with arrow Keys
        if (e.getKeyCode () == e.VK_W)
        {
            y1 = y1 - 10;
        }
        if (e.getKeyCode () == e.VK_S)
        {
            y1 = y1 + 10;
        }
        if (e.getKeyCode () == e.VK_A)
        {
            x1 = x1 - 10;
        }
        if (e.getKeyCode () == e.VK_D)
        {
            x1 = x1 + 10;
        }
        //Moving player 2 with WASD
        if (e.getKeyCode () == e.VK_UP)
        {
            y2 = y2 - 10;
        }
        if (e.getKeyCode () == e.VK_DOWN)
        {
            y2 = y2 + 10;
        }
        if (e.getKeyCode () == e.VK_LEFT)
        {
            x2 = x2 - 10;
        }
        if (e.getKeyCode () == e.VK_RIGHT)
        {
            x2 = x2 + 10;
        }

        repaint ();
    }

    public void keyReleased (KeyEvent e)
    {
    }

    public void keyTyped (KeyEvent e)
    {
    }
} // SoccerGame class

Answer 1

不要使用钥匙列者(正如您在其他问题中所建议的(。

相反，您应该使用Key Bindings。然后，您需要跟踪已按下哪些键并使用Swing Timer安排动画。

使用键盘查看运动。

KeyboardAnimation.java示例显示了如何完成的。