Chapter 19. Lightweight Components
AWT components are heavyweight, meaning they have a native peer and are rendered in an opaque window of their own. Since a heavyweight component is rendered in its own opaque window, it must always be rectangular in shape; if you want a see-through component, a heavyweight won't cut the mustard. Also, as you might suspect, a 1:1 ratio of native window per AWT component is not exactly ideal from a performance ...
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