java.lang.Object
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+----java.awt.image.ColorModel
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+----java.awt.image.IndexColorModel
public class IndexColorModel
extends ColorModel
A ColorModel class that specifies a translation from pixel values to alpha, red, green, and blue color components for pixels which represent indices into a fixed colormap. An optional transparent pixel value can be supplied which indicates a completely transparent pixel, regardless of any alpha value recorded for that pixel value. This color model is similar to an X11 PseudoColor visual.
Many of the methods in this class are final. The reason for this is that the underlying native graphics code makes assumptions about the layout and operation of this class and those assumptions are reflected in the implementations of the methods here that are marked final. You can subclass this class for other reaons, but you cannot override or modify the behaviour of those methods.