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lec5 - Outline ADT Abstract Data Type and examples Stack...

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Outline ADT - Abstract Data Type and examples Stack, Queue, Priority Queue Implementations Data structure review: Binary tree, binary search tree Heap Definition Properties Tree Implementation Lecture 5, ADT and heap, p. 1
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ADT — Abstract Data Type Motivation: Separate conceptual functionalities and al- gorithm implementation. Treat the data structure as a black box. Definition: [Sedgewick, pp128] An abstract data type ADT is a data type (a set of values and a collection of opera- tions on those values) that is accessed only through an interface . We refer to a pro- gram that uses an ADT as a client , and a program the specifies that data type as an implementation . Mapping to Java: Class definition Interface definition Lecture 5, ADT and heap, p. 2
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ADT, Examples: Stacks and Queues Stack (Last In First Out): isEmpty(): true if the stack is empty; false oth- erwise. push(a): push the element to the top of the stack.
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