使用键盘移动图像 - Java [英] Move image using keyboard - Java

问题描述

我想使用键盘箭头键移动我的图像。当我按下箭头键时，它会相应地移动到方向。但是，我需要先点击图像才能移动它。我是否可以知道如何编辑代码，以便在移动之前我不需要单击图像？我还想知道如果图像到达右边后如何使图像显示，反之亦然。

I wanted to move my image using keyboard arrow keys. when I pressed the arrow keys it moves accordingly to the direction. However, I need to click on the image before able to move it. May I know how to edit the code such that I do not need to click on the image before able to move it? I would also like to know how to make the image appear from the left once it reaches right and vice versa.

我的代码是：

    Collect.addKeyListener(new KeyAdapter() {
         public void keyPressed(KeyEvent ke)
         {   
         if(ke.getKeyCode() == KeyEvent.VK_LEFT)
             {
             Collect.setLocation(Collect.getX()-8,Collect.getY());
             repaint();
         }
         if(ke.getKeyCode() == KeyEvent.VK_RIGHT)
             {
             Collect.setLocation(Collect.getX()+8,Collect.getY());
             repaint();
         }
     }
 });
     Collect.addMouseListener(new MouseAdapter()
     {
     public void mouseClicked(MouseEvent me)
         {
         if(me.getClickCount() == 1)
             {
             boolean dd =  Collect.isOptimizedDrawingEnabled();
             boolean ff =  Collect.requestFocusInWindow();
             repaint();
         }
     }

 }); 

推荐答案

你看看 KeyBindings ，否则你必须 JComponent＃setFocusable（）图像的code>，例如移动图像

You have look at KeyBindings, otherwise you have to JComponent#setFocusable() that nest the Image, example for Moving Image

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