[hardwired]

C:\jexp\jon\src\homenetwork\bkr\training>javac *.java
ImagePreviewer.java:35: cannot find symbol
symbol  : method getScaledInstance(int,int,int)
location: class javax.swing.ImageIcon
                    if (icon.getIconWidth() > getWidth()) icon = new ImageIcon(icon.getIma
ge()).getScaledInstance(getWidth(),-1, Image.SCALE_DEFAULT);

     ^
ImageViewerFrame.java:59: setFileView(javax.swing.filechooser.FileView) in javax.swing.JFi
leChooser cannot be applied to (FileIconView)
        chooser.setFileView(new FileIconView(filter, new ImageIcon("icons/exit.png"))); //
FIX
               ^
ImageViewerFrame.java:72: cannot find symbol
symbol  : class ImageViewFrame
location: class ImageViewerFrame.FileOpenListener
            int result = chooser.showOpenFileDialog(ImageViewFrame.this);
                                                    ^
3 errors

Error 1:

icon = new ImageIcon(icon.getImage())
           .getScaledInstance(getWidth(),-1,Image.SCALE_DEFAULT);

You've misplaced a right parenthesis ")". The getScaledInstance method is being called on the ImageIcon instance instead of on its image argument.

icon = new ImageIcon(icon.getImage()
           .getScaledInstance(getWidth(),-1,Image.SCALE_DEFAULT));
setIcon(icon);

Error 2:

chooser.setFileView(new FileIconView(filter,
                        new ImageIcon("icons/exit.png")));

The argument for the setFileView method is/must be a FileView object.
You are supplying something unrelated. You might consider having the FileIconView class extend the FileView abstract class.

Error 3:
Typos.
Change

int result = chooser.showOpenFileDialog(ImageViewFrame.this);

to

int result = chooser.showOpenDialog(ImageViewerFrame.this);