ImageIcon won't appear on JButton

I can't figure this out. Whenever i try to make JButtons with images on them the JButtons appear blank.
But line 2 is System.out.println(temp.isFile()); and it always prints out true
and whenever I use an image from examples of people making imageicons it works
are my image files just too big? (64 by 64 pixels at 256 pixels per inch)
File temp = new File("Tiles/"+directory.getName()+"/"+directory.getName()+i+".gif");
System.out.println(temp.isFile());
buttons=new JButton(new ImageIcon("Tiles/"+directory.getName()+"/"+directory.getName()+i+".gif"));
contentPane.add(buttons[i]);

I am an idiot
The program I wrote to generate the image files was malfunctioning and they were all empty
facepalm

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