使用箭头键来控制图片 [英] Control Image with Arrow Keys

问题描述

我试图让我的形象根据什么方向我用键在屏幕上移动。现在，它并没有任何按键我preSS回应。出于测试目的，我只尝试实施使用右箭头键。我该如何获得图像时，关键是pressed应对？这是我到目前为止有：

 进口java.applet.Applet中;
进口java.awt.Graphics;
进口java.awt.event.ActionEvent中;
进口java.awt.event.ActionListener;
//进口java.awt.event.ActionEvent中;
//进口java.awt.event.ActionListener;
进口java.awt.event.KeyEvent中;
公共类EC扩展的Applet {
    / **
     *
     * /
    私有静态最后的serialVersionUID长1L =;
    INT X = 50;
    诠释Y = 50;
    INT DX，DY;
    公共无效键pressed（KeyEvent e而）
    {
        INT键code = e.getKey code（）;
        如果（键code == KeyEvent.VK_RIGHT）
        {
            DX = 1;
            X + = DX;
        }
    }
    公共无效调用keyReleased（KeyEvent e而）
    {
        INT键code = e.getKey code（）;
        如果（键code == KeyEvent.VK_RIGHT）
        {
            DX = 0;
        }
    }
    公共无效漆（图形G）
    {
        g.drawImage（IllustrationManager.player [0] [0]，X，Y，NULL）;
    }
}
 

解决方案

请参阅的运动使用以使用的KeyListener和一个更好的解决方案，它使用键绑定问题的键盘。

I am trying to get my image to move across the screen based on what arrow keys I use. Right now it does not respond to any key I press. For testing purposes I have only tried implementing the use of the RIGHT arrow key. How would I get the image to respond when the key is pressed? This is what I have so far:

import java.applet.Applet; 
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
//import java.awt.event.ActionEvent;
//import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;


public class EC extends Applet{
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    int x=50;
    int y=50;
    int dx,dy;
    public void keyPressed(KeyEvent e)
    {
        int keyCode = e.getKeyCode();
        if(keyCode==KeyEvent.VK_RIGHT)
        {
            dx=1;
            x+=dx;
        }
    }
    public void keyReleased(KeyEvent e)
    {
        int keyCode = e.getKeyCode();
        if(keyCode==KeyEvent.VK_RIGHT)
        {
            dx=0;
        }
    }
    public void paint(Graphics g)
    {
        g.drawImage(IllustrationManager.player[0][0],x,y,null);
    }


}

解决方案

See Motion Using the Keyboard for the problems with using a KeyListener and a better solution which uses Key Bindings.

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