17. Data Structures

Much that I bound, I could not free;

Much that I freed returned to me.

Lee Wilson Dodd

‘Will you walk a little faster?’ said a whiting to a snail,

‘There’s a porpoise close behind us, and he’s treading on my tail.’

Lewis Carroll

There is always room at the top.

Daniel Webster

Push on—keep moving.

Thomas Morton

I’ll turn over a new leaf.

Miguel de Cervantes


In this chapter you will learn:

  • To form linked data structures using references, self-referential classes and recursion.

  • The type-wrapper classes that enable programs to process primitive data values as objects.

  • To use autoboxing to convert a primitive ...

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