Error : Help Please

[jDuke]

Hi there, i have this code:

Code:

		openMenuItem.addActionListener(new ActionListener() {
			public void actionPerformed(final ActionEvent arg0) {
				JFileChooser chooser = new JFileChooser();
				chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
				int state = chooser.showOpenDialog(frame);
				if (state == JFileChooser.APPROVE_OPTION) {
					File directory = chooser.getSelectedFile();
					imageFiles = directory.listFiles(new ImageListFileFilter());

					for (int i = 0; i < imageFiles.length; i++) {
						//imageContainers.add(new Thumbnail(fullSize, i));
						imageContainers.add(new JButton());
						imageContainers.get(i).setIcon(new ImageIcon(new Picture(imageFiles[i], true).getPicture()));
						imageContainers.get(i).addActionListener(new ActionListener() {
							public void actionPerformed(final ActionEvent evt) {
								File x = imageFiles[i];
								fullSize.setIcon(new ImageIcon(new Picture(imageFiles[0], false).getPicture()));
							}
						});
						panel.add(imageContainers.get(i));
					}
				}
			}
		});

And in the variable 'i' on the line

Code:

File x = imageFiles[i];

It gives me this error:
Cannot refer to a non-final variable i inside an inner class defined in a different method

I couldn't find anywhere to solve it on the internet.
Can anyone help me please it's really important.

Thanks in advance.

[hardwired]

Code:

class EnclosingClass {

    inSomeInitializingMethod() {
        File[] imageFiles;  // local variable
        openMenuItem.addActionListener(new ActionListener() {
            ...
            // Local variable accessed inside inner class must be
            // declared final. One option is to remove the local
            // variable and make it a member variable - see below.
            imageFiles = directory.listFiles(new ImageListFileFilter());

Code:

class EnclosingClass {
    File[] imageFiles;  // member variable

    inSomeInitializingMethod() {
        openMenuItem.addActionListener(new ActionListener() {
            ...
            // Should be okay now.
            imageFiles = directory.listFiles(new ImageListFileFilter());

[Eranga]

Simply it says, you must use final values only within the inner class. Try to keep your variable constant.