java - 悬停时图像变化 Java

Question

我知道 item1.setToolTipText("This shown on mouse moving"); 将允许在鼠标悬停在文本上时显示文本。我想知道是否可以在鼠标悬停时改变图像？提前致谢。

Answer 1

我会向保存图像的组件添加一个 MouseListener。

然后只需重写方法 mouseEntered(MouseEvent e) 和 mouseExited(MouseEvent e) 即可更改图像。

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(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);
  }
}