a) Use e.g. any subclass of Image, e.g. BufferedImage, to hold the
image, and a JPanel to display it. Use e.g.

http://java.sun.com/j2se/1.5.0/docs/api/java/awt/Graphics.html#drawImage(java.aw
t.Image,%20int,%20int,%20int,%20int,%20int,%20int,%20int,%20int,%20java.awt.imag
e.ImageObserver)

to draw the image.

In order to pull this successful off, you need to familiarize yourself
with the general way drawing/painting in Swing happens.

b) Load the Image into a BufferedImage. Then use

http://java.sun.com/j2se/1.5.0/docs/api/java/awt/image/BufferedImage.html#getSub
image(int,%20int,%20int,%20int)

to create a sub-image. Create an ImageIcon from the BufferedImage and
display that ImageIcon in a JLabel.

c) Use a scrollpane, turn the scrollbars of, and set the viewport to the
parts of the image you want to display.

/Thomas