Transparency and Compositing
Many visually impressive effects can be made using transparency and composite overlay.
Composite attributes are generally set in an AlphaComposite object and added to the Graphics2D context with the Graphics2D.setComposite() method. There is no direct way to instantiate an AlphaComposite object. Instead, a so-called factory method, AlphaComposite.getInstance(), is called. There are two variations of the getInstance() method; the first has one argument specifying the mixing rule to use (discussed next). The second version of the getInstance() method has both the argument for specifying the mixing rule as well as an argument specifying the transparency value to use. The transparency value ranges from 0–1 (in floating ...
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