21. Data Structures
Objectives
In this chapter you’ll learn:
• To form linked data structures using references, self-referential classes and recursion.
• How boxing and unboxing enable simple-type values to be used where objects are expected in a program.
• To create and manipulate dynamic data structures, such as linked lists, queues, stacks and binary trees.
• Various important applications of linked data structures.
• To create reusable data structures with classes, inheritance and composition.
Much that I bound, I could not free; Much that I freed returned to me.
—Lee Wilson Dodd
There is always room at the top.
—Daniel Webster
I think that I shall never see A poem lovely as a tree.
—Joyce Kilmer
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