Doubly Linked Lists 3/18/14

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Doubly Linked Lists 1

Doubly Linked Lists

© 2014 Goodrich, Tamassia, Goldwasser

Presentation for use with the textbook Data Structures and Algorithms in Java, 6th edition, by M. T. Goodrich, R. Tamassia, and M. H. Goldwasser, Wiley, 2014

Doubly Linked Lists 2

Doubly Linked List q  A doubly linked list can be traversed

forward and backward q  Nodes store:

n  element n  link to the previous node n  link to the next node

q  Special trailer and header nodes

prev next

element

trailer header nodes/positions

elements

node

© 2014 Goodrich, Tamassia, Goldwasser

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Doubly Linked Lists 3

Insertion q  Insert a new node, q, between p and its successor.

A B X C

A B C

p

A B C

p

X

q

p q

© 2014 Goodrich, Tamassia, Goldwasser

Doubly Linked Lists 4

Deletion q  Remove a node, p, from a doubly linked list.

A B C D

p

A B C

D

p

A B C © 2014 Goodrich, Tamassia, Goldwasser

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Doubly-Linked List in Java

© 2014 Goodrich, Tamassia, Goldwasser Doubly Linked Lists 5

Doubly-Linked List in Java, 2

© 2014 Goodrich, Tamassia, Goldwasser Doubly Linked Lists 6

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Doubly-Linked List in Java, 3

© 2014 Goodrich, Tamassia, Goldwasser Doubly Linked Lists 7

Doubly-Linked List in Java, 4

© 2014 Goodrich, Tamassia, Goldwasser Doubly Linked Lists 8