如何在Java中聆听按键时移动图像。

你可以使用Swing计时器为图像设置动画：

import java.awt.*;import java.awt.event.*;import javax.swing.*;public class TimerAnimation extends JLabel implements ActionListener{    int deltaX = 2;    int deltaY = 3;    int directionX = 1;    int directionY = 1;    public TimerAnimation(        int startX, int startY,        int deltaX, int deltaY,        int directionX, int directionY,        int delay)    {        this.deltaX = deltaX;        this.deltaY = deltaY;        this.directionX = directionX;        this.directionY = directionY;        setIcon( new ImageIcon("dukewavered.gif") );//      setIcon( new ImageIcon("copy16.gif") );        setSize( getPreferredSize() );        setLocation(startX, startY);        new javax.swing.Timer(delay, this).start();    }    public void actionPerformed(ActionEvent e)    {        Container parent = getParent();        //  Determine next X position        int nextX = getLocation().x + (deltaX * directionX);        if (nextX < 0)        { nextX = 0; directionX *= -1;        }        if ( nextX + getSize().width > parent.getSize().width)        { nextX = parent.getSize().width - getSize().width; directionX *= -1;        }        //  Determine next Y position        int nextY = getLocation().y + (deltaY * directionY);        if (nextY < 0)        { nextY = 0; directionY *= -1;        }        if ( nextY + getSize().height > parent.getSize().height)        { nextY = parent.getSize().height - getSize().height; directionY *= -1;        }        //  Move the label        setLocation(nextX, nextY);    }    public static void main(String[] args)    {        JPanel panel = new JPanel();        Jframe frame = new Jframe();        frame.setContentPane(panel);        frame.setDefaultCloseOperation( Jframe.EXIT_ON_CLOSE );        frame.getContentPane().setLayout(null);//      frame.getContentPane().add( new TimerAnimation(10, 10, 2, 3, 1, 1, 10) );        frame.getContentPane().add( new TimerAnimation(300, 100, 3, 2, -1, 1, 20) );//      frame.getContentPane().add( new TimerAnimation(0, 000, 5, 0, 1, 1, 20) );        frame.getContentPane().add( new TimerAnimation(0, 200, 5, 0, 1, 1, 80) );        frame.setSize(400, 400);        frame.setLocationRelativeTo( null );        frame.setVisible(true);//      frame.getContentPane().add( new TimerAnimation(10, 10, 2, 3, 1, 1, 10) );//      frame.getContentPane().add( new TimerAnimation(10, 10, 3, 0, 1, 1, 10) );    }}

你可以将KeyListener添加到面板，它将独立于图像动画进行操作。