悬停Java上的图像更改 [英] Image change on hover Java

问题描述

我知道 item1.setToolTipText（这显示在鼠标悬停上）; 将允许文本显示出来，如果鼠标悬停在它上面。我想知道如果我可以在鼠标悬停时更改图像吗？

解决方案

我会为您的组件添加一个 MouseListener 那么只需重写方法 mouseEntered（MouseEvent e）和 mouseExited（MouseEvent e）改变图像。

这是一个完整的工作示例：

  public class JFrameExample {
 
 public static void main（String [] args）throws MalformedURLException，IOException {
 final JButton j; 
 BufferedImage imgOne = ImageIO.read（新网址（http://www.suptechnology.ma/entrepot/logocert/logocert-20130211115413.png））; 
 BufferedImage imgTwo = ImageIO.read（新网址（http://market.milouz.com/data/icon53.png））; 
 
最终ImageIcon imageIconOne =新ImageIcon（imgOne）; 
 final ImageIcon imageIconTwo = new ImageIcon（imgTwo）; 
 
 JFrame f = new JFrame（This is a test / Image on hover）; 
 f.setSize（500，500）; 
容器内容= f.getContentPane（）; 
 content.setLayout（new FlowLayout（））; 
 j =新JButton（imageIconOne）; 
 j.addMouseListener（new MouseListener（）{
 @Override 
 public void mouseReleased（MouseEvent arg0）{} 
 @Override 
 public void mousePressed（MouseEvent arg0）{ } 
 @Override 
 public void mouseExited（MouseEvent arg0）{
 j.setIcon（imageIconOne）; 
} 
 @Override 
 public void mouseEntered（MouseEvent arg0）{
 j.setIcon（imageIconTwo）; 
} 
 @Override 
 public void mouseClicked（MouseEvent arg0）{} 
}）; 
 content.add（j）; 
 f.setVisible（true）; 
} 
} 
  

I know that item1.setToolTipText("This shows up on mouse hover"); will allow text to show up if the mouse hovers over it. I was wondering if I could make the image change on mouse hover? Thanks in advance.

解决方案

I would add a MouseListener to your component that holds the image.

Then just override the methods mouseEntered(MouseEvent e) and mouseExited(MouseEvent e) to change the image.

Here's a full working example :

public class JFrameExample {

    public static void main(String[] args) throws MalformedURLException, IOException {
        final JButton j;      
        BufferedImage imgOne = ImageIO.read(new URL("http://www.suptechnology.ma/entrepot/logocert/logocert-20130211115413.png"));
        BufferedImage imgTwo = ImageIO.read(new URL("http://market.milouz.com/data/icon53.png"));

        final ImageIcon imageIconOne = new ImageIcon(imgOne);
        final ImageIcon imageIconTwo = new ImageIcon(imgTwo);

        JFrame f = new JFrame("This is a test / Image on hover");
        f.setSize(500, 500);
        Container content = f.getContentPane();
        content.setLayout(new FlowLayout()); 
        j = new JButton(imageIconOne);
        j.addMouseListener(new MouseListener() {            
            @Override
            public void mouseReleased(MouseEvent arg0) {}           
            @Override
            public void mousePressed(MouseEvent arg0) {}            
            @Override
            public void mouseExited(MouseEvent arg0) { 
                j.setIcon(imageIconOne);
            }           
            @Override
            public void mouseEntered(MouseEvent arg0) {
                    j.setIcon(imageIconTwo);
            }           
            @Override
            public void mouseClicked(MouseEvent arg0) {}
        });
        content.add(j);     
        f.setVisible(true);
  }
}

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