UTF8 i odczyt po zmianie.

java podstawy wydanie IX.
Mam problem z zadaniami pod linuksem, zadania są kodowane w cp1250 po zmianie na utf8 wywala mi błąd przy kompilacji i później przy probie odpalenia pliku.
błąd z t1/r02/ImageViewer

```error: cannot find symbol
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
              ^
  symbol:   variable DEFAULT_WIDTH
  location: class ImageViewerFrame
ImageViewer.java:35: error: cannot find symbol
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
                             ^
  symbol:   variable DEFAULT_HEIGHT
  location: class ImageViewerFrame
ImageViewer.java:38: error: cannot find symbol
      label = new JLabel();
      ^
  symbol:   variable label
  location: class ImageViewerFrame
ImageViewer.java:39: error: cannot find symbol
      add(label);
          ^
  symbol:   variable label
  location: class ImageViewerFrame
ImageViewer.java:42: error: cannot find symbol
      chooser = new JFileChooser();
      ^
  symbol:   variable chooser
  location: class ImageViewerFrame
ImageViewer.java:43: error: cannot find symbol
      chooser.setCurrentDirectory(new File("."));
      ^
  symbol:   variable chooser
  location: class ImageViewerFrame
ImageViewer.java:58: error: cannot find symbol
               int result = chooser.showOpenDialog(null);
                            ^
  symbol: variable chooser
ImageViewer.java:63: error: cannot find symbol
                  String name = chooser.getSelectedFile().getPath();
                                ^
  symbol: variable chooser
ImageViewer.java:64: error: cannot find symbol
                  label.setIcon(new ImageIcon(name));
                  ^
  symbol: variable label
9 errors
s:~/JavaPodstawy/t1/r02/ImageViewer$ java ImageViewer
Exception in thread "main" java.lang.NoClassDefFoundError: ImageViewerFrame
   at ImageViewer.main(ImageViewer.java:15)
Caused by: java.lang.ClassNotFoundException: ImageViewerFrame
   at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
   at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
   ... 1 more
:~/JavaPodstawy/t1/r02/ImageViewer$ java ImageViewer
Exception in thread "main" java.lang.NoClassDefFoundError: ImageViewerFrame
   at ImageViewer.main(ImageViewer.java:15)
Caused by: java.lang.ClassNotFoundException: ImageViewerFrame
   at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
   at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
   ... 1 more