當我點擊圖像時，如何讓圖像消失？

Question

我有一個JOptionPane裏面的圖像，我希望它消失，只要我點鼠標光標並點擊它。

這個職位有什麼要求嗎？

謝謝...

下面的代碼：

import javax.imageio.ImageIO; 
import javax.swing.*; 
import java.awt.*; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.image.BufferedImage; 
import java.io.File; 
import java.io.IOException; 
import java.util.Random; 

class ImageBlinking extends JComponent 
{ 


BufferedImage image; 
boolean showImage; 
int x = -1; 
int y = -1; 
Random r; 

ImageBlinking() 
{ 
    try 
    { 
     File sourceimage = new File("ball.gif"); 
     image = ImageIO.read(sourceimage); 
    } 
    catch (IOException e) 
    { 
     e.printStackTrace(); 
    } 


    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(200, listener); 
    timer.start(); 

    setPreferredSize(new Dimension(1000, 1000)); 
    JOptionPane.showMessageDialog(null, this); 
    timer.stop(); 
} 


public void paintComponent(Graphics g) 
{ 


    g.setColor(Color.black); 
    g.fillRect(0, 0, getWidth(), getHeight()); 
    if (image != null) 
    { 
     g.drawImage(image, x, y,80,80, this); 
     setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR)); 
    } 


} 

public static void main(String[] args) 
{ 
    SwingUtilities.invokeLater(new Runnable() 
    { 
     public void run() 
     { 
      new ImageBlinking(); 
     } 
    }); 
} 
} 

Answer 1

（編輯:)
我把Keylistener您JComponent，然後我看，如果將MouseEvent你的圖片，如果它的情況下，我停止計時器，並把圖像的顏色爲黑色

import java.awt.Color; 
import java.awt.Cursor; 
import java.awt.Dimension; 
import java.awt.Graphics; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.event.MouseAdapter; 
import java.awt.event.MouseEvent; 
import java.awt.image.BufferedImage; 
import java.io.File; 
import java.io.IOException; 
import java.util.Random; 

import javax.imageio.ImageIO; 
import javax.swing.JComponent; 
import javax.swing.JOptionPane; 
import javax.swing.SwingUtilities; 
import javax.swing.Timer; 

class BlockBlinking extends JComponent { 
    BufferedImage image; 
    boolean showImage; 
    int x = -1; 
    int y = -1; 
    int imageW = 20; 
    int imageH = 20; 

    Random r; 
    private Timer timer; 
    Color imageColor=null; 

    BlockBlinking() { 
     { 
      try 
      { 
       File sourceimage = new File("ball.gif"); 
       image = ImageIO.read(sourceimage); 
      } 
      catch (IOException e) 
      { 
       e.printStackTrace(); 
      } 

      this.addMouseListener(new MyMouseListener()); 

      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 = new Timer(500, listener); 
      timer.start(); 

      setPreferredSize(new Dimension(500, 400)); 
      JOptionPane.showMessageDialog(null, this); 
      timer.stop(); 

     } 
    } 

    public void paintComponent(Graphics g) { 
     g.setColor(Color.black); 
     g.fillRect(0, 0, getWidth(), getHeight()); 
     if (image != null) { 

      if(imageColor != null){ 
       Graphics imageGraphic =image.createGraphics(); 
       imageGraphic.setColor(imageColor); 
       imageGraphic.fillRect(0, 0, image.getWidth(), image.getHeight()); 
      } 
      g.drawImage(image, x, y,imageW,imageH, this); 
      setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR)); 
     } 
    } 

    public static void main(String[] args) { 
     SwingUtilities.invokeLater(new Runnable() { 
      public void run() { 
       new BlockBlinking(); 
      } 
     }); 
    } 

    class MyMouseListener extends MouseAdapter { 
     @Override 
     public void mouseReleased(MouseEvent e) { 
      if (e.getX() >= x && e.getX() <= x + imageW && e.getY() >= y && e.getY() <= y + imageH) { 
       imageColor = Color.BLACK; 
       repaint(); 
       timer.stop(); 
      } 

     } 
    } 
} 

編輯：看看領域imageW和imageH

Answer 2

一種方法是使用JToggleButton。

import java.awt.*; 
import java.awt.image.BufferedImage; 
import javax.swing.*; 

class ImageVanish extends JComponent { 

    ImageVanish() { 
     // put your image reading code here.. 
     BufferedImage imageSelected = new BufferedImage(
      32,32,BufferedImage.TYPE_INT_ARGB); 
     BufferedImage image = new BufferedImage(
      32,32,BufferedImage.TYPE_INT_ARGB); 
     Graphics g = image.createGraphics(); 
     g.setColor(Color.ORANGE); 
     g.fillOval(0,0,32,32); 
     g.dispose(); 
     // END - image read 
     JToggleButton b = new JToggleButton(); 
     b.setIcon(new ImageIcon(image)); 
     b.setSelectedIcon(new ImageIcon(imageSelected)); 
     b.setBorderPainted(false); 
     b.setContentAreaFilled(false); 
     JOptionPane.showMessageDialog(null, b); 
    } 

    public static void main(String[] args) { 
     SwingUtilities.invokeLater(new Runnable() { 
      public void run() { 
       new ImageVanish(); 
      } 
     }); 
    } 
} 

對於定位，看到他們answer到你剛纔的問題@Hovercraft FOE的建議。