11 - CMPSCI 187 Programming With Data Structures Lecture 11...

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CMPSCI 187: Programming With Data Structures Lecture 11: Linked Data Structures 3 October 2011
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Linked Data Structures • The Basic Idea • Advantages and Disadvantages The Class LinearNode in L&C Inserting and Deleting in a Linear Linked List Searching a Linear Linked List
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The Basic Idea of Linked Data Structures • A Java object can hold any kind of data, including another object of the same class as itself. • Of course this means that some data field of the object holds a pointer to another object of the same class. • Suppose we extend the class Dog to a class SledDog which includes a field SledDog next , so that if king is a SledDog , then king.next is the dog immediately following King in his sled team. • If King is the lead dog, the other dogs in the team are king.next , king.next.next , king.next.next.next , and so on. Every dog in the team is reachable from King by following pointers.
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More Basics of Linked Structures • If we are primarily studying the linkages between data items, we call the individual items nodes , the usual term in mathematics (along with vertices ) for the “dots” in a diagram with dots, lines, and arrows -- a graph .
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