如何保留ImageIcon的文件名以供以后参考？

Question

Given this code,

tableButton = new JButton(new ImageIcon("80F_FG2015.GIF"));

how would I get that String to be returned to me so I can compare it to another String ?

Answer 1

Well one way to solve your problem is creating

tableButton = new JButton(new ImageIcon("80F_FG2015.GIF", "80F_FG2015.GIF"));

The second argument is the description. And ImageIcon.toString() method returns the description. So you can very well compare this description with the description from another image icon

You can get back the description as follows:

System.out.println(((ImageIcon)tableButton.getIcon()).getDescription()); 
//or
System.out.println(((ImageIcon)tableButton.getIcon()).toString());

Answer 2

You can achieve that using Reflection :

    ImageIcon icon = new ImageIcon(pathImg);
    JButton jButton1 = new JButton(icon);
    Field field = null;
    try {
        Class<? extends ImageIcon> clazz = ((ImageIcon) jButton1.getIcon()).getClass();
        //Get the field "filename" where the Image path is stored. 
        field = clazz.getDeclaredField("filename");
        field.setAccessible(true);
        String path = (String) field.get(icon);
    } catch (NoSuchFieldException ex) {
        Logger.getLogger(AAMainWindow.class.getName()).log(Level.SEVERE, null, ex);
    } catch (SecurityException ex) {
        Logger.getLogger(AAMainWindow.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IllegalArgumentException ex) {
        Logger.getLogger(AAMainWindow.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
        Logger.getLogger(AAMainWindow.class.getName()).log(Level.SEVERE, null, ex);
    }

Answer 3

You could create a new class that extends JButton. Store the string in the class.

class MyButton extends JButton
{
    private String filename;

    public MyButton(String filename)
    {
        super(new ImageIcon(filename));
        this.filename = filename;
    }

    public String getFilename()
    {
        return filename;
    }
}