TAILIEUCHUNG - Lecture Java methods: Object-oriented programming and data structures (3rd AP edition): Chapter 26 - Maria Litvin, Gary Litvin

Chapter 26 - Heaps and priority queues. This chapter completes our tour of data structures. After you have mastered the material in this chapter, you will be able to: Learn about heaps, review the class, learn about heapsort. | Heaps and Priority Queues 2 H C R E A 6 T P Copyright © 2015 by Maria Litvin, Gary Litvin, and Skylight Publishing. All rights reserved. Java Methods Object-Oriented Programming and Data Structures Maria Litvin ● Gary Litvin 3rd AP edition 26- This chapter completes our tour of data structures. Objectives: Learn about heaps Review the class Learn about Heapsort 26- Heap algorithms are simple and elegant. Priority Queues A priority queue is a data structure for temporary storage that delivers the stored items in order of their priority: an item with higher priority is delivered first. The objects in a priority queue are Comparable (or a comparator is provided). According to a convention, the smaller item has higher priority. 26- A priority queue can hold duplicate objects. Instead of using comparable objects, we could use items with some method defined that returns the item’s priority. If priority can take only a small number of discrete values (for

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