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25b-generics - CSE 143 Lecture 25(b Generic collections...

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CSE 143 Lecture 25 (b) Generic collections read 11.1, 15.3-15.4, 16.4-16.5 slides created by Marty Stepp http://www.cs.washington.edu/143/
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2 Our list classes • We implemented the following two list classes: – ArrayIntList – LinkedIntList – Problem: • We should be able to treat both lists the same way in client code. 17 -3 42 value 2 1 0 index front 42 next data -3 next data 17 next data
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3 Recall: ADT interfaces (11.1) abstract data type (ADT) : A specification of a collection of data and the operations that can be performed on it. – Describes what a collection does, not how it does it. • Java's collection framework describes ADTs with interfaces: – Collection , Deque , List , Map , Queue , Set , SortedMap • An ADT can be implemented in multiple ways by classes: – ArrayList and LinkedList implement List – HashSet and TreeSet implement Set – LinkedList , ArrayDeque , etc. implement Queue • Exercise: Create an ADT interface for the two list classes.
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4 An IntList interface (16.4) // Represents a list of integers.
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