clear the java buffer

[Emmanuel Freund]

I have a strange error:

With this function:


public static ImageIcon loadImageIcon(String file, String iconName) {
return new ImageIcon(file+ '/' + iconName);
}
I first rename Image1.jpg to someImage.jpg and call this function with
loadImageIcon(myFile,someImage.jpg).
So Image1.jpg is loaded and paint (with some other functions of course).
Then during my execution, I rename Image2.jpg to someImage.jpg and call
loadImageIcon(myFile,someImage.jpg).
Then the Image loaded is still Image1.jpg.

Is that possible that Java remember that's the same function called with the
same variables, and so don't reload the Image and instead take the Image
from a buffer somewhere?
And if it's the case, how can we clear the buffer so the Image2.jpg is
reloaded?
Thanks,

 

[Ann]

I have a strange error:

With this function:


public static ImageIcon loadImageIcon(String file, String iconName) {
return new ImageIcon(file+ '/' + iconName);
}
I first rename Image1.jpg to someImage.jpg and call this function with
loadImageIcon(myFile,someImage.jpg).
So Image1.jpg is loaded and paint (with some other functions of course).
Then during my execution, I rename Image2.jpg to someImage.jpg and call
loadImageIcon(myFile,someImage.jpg).
Then the Image loaded is still Image1.jpg.

Is that possible that Java remember that's the same function called with the
same variables, and so don't reload the Image and instead take the Image
from a buffer somewhere?
And if it's the case, how can we clear the buffer so the Image2.jpg is
reloaded?
Thanks,

Try closing the file.

 

[Emmanuel Freund]

Try closing the file.

I may have missed something, but I used an ImageIcon which takes one string
and no file in its constructor... So I think all the openning-closing
operations are done in this constructor to which I don't have access.
So, how I close a file I haven't open ?

 

[Andrew Thompson]

Is that possible that Java remember that's the same function called with the
same variables, and so don't reload the Image and instead take the Image
from a buffer somewhere?

It possibly is..
<http://java.sun.com/j2se/1.5.0/docs/api/java/awt/Toolkit.html#getImage(java.net.URL)>

 

[Andrew Thompson]

ImageIcon which takes one string
and no file in its constructor..

So?
<http://java.sun.com/j2se/1.5.0/docs/api/javax/swing/ImageIcon.html#ImageIcon(java.lang.String)>

Which, if you look at the source of ..
<http://www.physci.org/source.jsp?class=javax.swing.ImageIcon>
You'll notice it calls..
<http://java.sun.com/j2se/1.5.0/docs/api/java/awt/Toolkit.html#getImage(java.lang.String)>

'caching'.

Don't use ImageIcons if you don't want the image cached,
load the bytes yourself and use ..
<http://java.sun.com/j2se/1.5.0/docs/api/java/awt/Toolkit.html#createImage(byte[])>

HTH

 

[Emmanuel Freund]

Thank you very much Andrew, that was the problem.