Advanced Features in Java: Working with Sets In Java

Overview/Description
Expected Duration
Lesson Objectives
Course Number
Expertise Level

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Overview/Description

In this course, you'll explore the Set interface and the different Set collections available in Java. You'll learn how the Java Set interface extends Collection, and how it is used to define unordered collections in which duplicates are not allowed. You'll discover common set operations such as union, difference, intersection, and equality, as well as how these are influenced heavily by the implementation of .equals and .hashCode in the objects contained within the set. You'll cover four implementations of the Set interface - HashSet, LinkedHashSet, EnumSet, and TreeSet. Finally, you'll learn the correct implementations of the .hashCode, .equals, and .compareTo methods of user-defined objects that are to be stored in Sets.

Expected Duration (hours)
1.4

Lesson Objectives

Advanced Features in Java: Working with Sets In Java

discover the key concepts covered in this course

create a HashSet object and invoke multiple methods on it, and also correctly override the .hashCode and .equals method of the contained class

describe how the HashSet behaves with duplicates and how overridden versions of the .equals and the .hashCode methods influence this behavior

recognize the different types of sets and how they all extend the Set, Collection, and Iterable interfaces

differentiate between methods used to compute set union, difference, intersection, and equality operations

analyze the performance characteristics of LinkedHashSets, TreeSets, and HashSets

recognize how and why EnumSets should be used to represent categorical data

describe how different implementations of the Set interface differ in their notions of set order

create a TreeSet and sort it using various custom comparators

create a TreeSet that stores custom objects without also creating a custom comparator

summarize the key concepts covered in this course

Course Number:
it_jdadfjdj_04_enus

Expertise Level
Expert