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Writing Applets:
This is the starting point for learning everything about writing applets.
Essential Java Classes:
By taking this trail,
you can find out about strings, exceptions, threads,
and other Java features that are used in all kinds
of Java programs.
2D Graphics:
If you are using JDK 1.2,
you can use 2D graphics
when writing Swing components that do custom painting.
Sound:
You can use sound to enhance your program's user interface.