悬停Java时的图像更改
我知道 item1.setToolTipText("This shows up on mouse hover");
将允许在鼠标悬停时显示文本.我想知道是否可以在鼠标悬停时更改图像?提前致谢.
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.
推荐答案
我会在你的组件中添加一个 MouseListener
来保存图像.
I would add a MouseListener
to your component that holds the image.
然后只需重写方法 mouseEntered(MouseEvent e)
和 mouseExited(MouseEvent e)
来更改图像.
Then just override the methods mouseEntered(MouseEvent e)
and mouseExited(MouseEvent e)
to change the image.
这是一个完整的工作示例:
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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