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Overview of Course
Java Review
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This Course Covers, using Java
 Abstract data types
 Design, what you want them to do (OOD)
 Techniques, used in implementation (class)
 Example: integers, strings, lists, etc
 Data structures
 Ways of organizing large quantities of data in computer’s
memory

Vector lists, linked lists, trees, hash tables
 Problem solving
 Solving problems in managing data structures
 Using data structures to solve real problems
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THINK BIG:
 how does Amazon keep track of inventory, customer
reviews, suppliers?
 how does Google keep track of web links?
 how does Google maps find the shortest route between
two cities?
 how does your email get sorted by name, date, etc?
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Java Collection Classes
PERHAPS ONE OF THE MOST IMPORTANT
changes to the Java environment over the past few
years has been the introduction of a set of classes
informally called the collection classes. This group of
classes fills out java.util, bringing many commonly used
data structures under one roof. For example, there is a
Stack class. Unfortunately, there is no Queue.

http://download.oracle.com/javase/tutorial/collections/
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Some examples of data structures
 Arrays, 2D Arrays
 Vector Lists, Linked Lists
 Algorithms for processing lists
 Stacks, Queues
 Trees
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An example Array of Readings stored in
memory starting at address x
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A two-dimensional array with four rows and five
columns stored in row major order
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Storing names in memory as a contiguous list
vector list)
(
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Storing names in a linked list
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Using a
stack to
print a
linked list
in reverse
order
(continue
d)
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Using a
stack to
print a
linked list
in reverse
order
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A queue implemented with head and
tail pointers
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A queue “crawling” through
memory
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A circular queue (b) in its conceptual form in
which the last cell in the block is “adjacent” to the first cell
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An example of an organization
chart
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Tree terminology
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The structure of a node in a binary
tree
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The conceptual and actual organization of a binary tree using a linked
storage system
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What good are all these things? Here are some applications you'll learn
about:
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