如何使图像在随机位置闪烁？

我在JApplet有一个图像，我希望它出现在随机位置。 它将在1秒后消失并再次出现在另一个随机位置。

如何实现“随机闪烁”？

 import javax.imageio.ImageIO; import javax.swing.*; import java.awt.*; import java.net.URL; public class Random extends JApplet { Image ball; public void init() { try { URL pic = new URL(getDocumentBase(), "ball.gif"); ball = ImageIO.read(pic); } catch (Exception e) { e.printStackTrace(); } } public void paint(Graphics g) { if (ball != null) { g.drawImage(ball,50,50,50,50,this); } } } 

Answer 1

 import java.awt.*; import java.awt.event.*; import java.awt.image.*; import javax.swing.*; import java.util.Random; class ImageBlinker extends JComponent { BufferedImage image; boolean showImage; int x = -1; int y = -1; Random r; ImageBlinker() { // put your image reading code here.. image = new BufferedImage(32,32,BufferedImage.TYPE_INT_ARGB); Graphics g = image.createGraphics(); g.setColor(Color.ORANGE); g.fillOval(0,0,32,32); // END - image read r = new Random(); ActionListener listener = new ActionListener(){ public void actionPerformed(ActionEvent ae) { if (image!=null) { if (!showImage) { int w = image.getWidth(); int h = image.getHeight(); int rx = getWidth()-w; int ry = getHeight()-h; if (rx>-1 && ry>-1) { x = r.nextInt(rx); y = r.nextInt(ry); } } showImage = !showImage; repaint(); } } }; Timer timer = new Timer(600,listener); timer.start(); setPreferredSize(new Dimension(150,100)); JOptionPane.showMessageDialog(null, this); timer.stop(); } public void paintComponent(Graphics g) { g.setColor(Color.BLUE); g.fillRect(0,0,getWidth(),getHeight()); if (showImage && image!=null) { g.drawImage(image,x,y,this); } } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { new ImageBlinker(); } }); } } 

Answer 2

为了我的钱，我将Image放在ImageIcon中，将ImageIcon放在JLabel中，然后使用Swing Timer和Random对象随机移动JLabel。 您必须将其布局设置为null的容器（contentPane将执行）中移动它，并且您必须将JLabel的大小指定为其preferredSize以使其工作。