Java Data Structures

Java Data Structures

0%

1. Basic Data Structures

In this section, you will be introduced to the concept of a list and the most commonly used types of lists. You will learn how to create them and use various lists correctly.

Introduction to Data Structures

List and ArrayList

Challenge (ArrayList)

CRUD operations

Implementing our LinkedList

Challenge (LinkedList)

Section 1 Summary

2. Additional Data Structures

This section will introduce you to data structures that are not used as frequently but are still valuable. Data structures like set, stack, queue, and deque will help you better understand how Java works and various applications with databases. There will also be plenty of practice to reinforce both new and previous material.

Challenge (Deque Practice)

Section 2 Summary

3. Map

This section will introduce you to a data structure called a map. This data structure operates on the principle of key-value pairs, meaning we retrieve data based on a specific key. This allows us to build various data structures that closely resemble databases. You will also learn about concepts such as HashCode and explore data structures like HashMap and HashSet.

HashMap Practice

Map with Other Data Structures

Section 3 Summary

4. enum & Stream API

The final touches on mastering the basic data structures. In this section, we will talk about another data structure - enum, and also explore how to work with the flow of information in the data structure using the Stream API.

Challenge (Character Class)

Method Reference

Stream Practice

Section 4 Summary

Section 4 Summary

Congratulations on completing the course on data structures!

You've done a great job, and now you deserve to receive your certificate. Data structures may seem challenging at first, but the more you practice, the easier it becomes to master them.

The last section might have seemed particularly difficult, but do we ever learn something without facing challenges? Difficulties toughen us up and add to our knowledge and experience. I've prepared a quiz for you that will help refresh your memory and test the knowledge you've gained during this course.

And here's a piece of advice for you: practice is the best friend of any programmer. The more you practice, the better you become. You already have enough knowledge to write small programs or perform complex calculations. In general, you are capable of creating a simple backend for an online store and much more.

Good luck, and thank you for staying with us!

1. What is the Java Collections Framework?

2. Which interface extends Collection in the Java Collections Framework?

3. What is the purpose of the `List` interface in Java Collections?

4. What is the key feature of the `Set` interface in Java Collections?

5. Which of the following is a valid implementation of the `Set` interface?

6. What is the purpose of the `Map` interface in Java Collections?

7. Which implementation of `Map` does not allow duplicate keys?

8. Which method is used to obtain a stream from a Collection in Java?

What is the Java Collections Framework?

Виберіть правильну відповідь

A language feature in Java

A set of classes and interfaces for handling collections of objects

A built-in database in Java

A tool for debugging Java code

Which interface extends Collection in the Java Collections Framework?

Виберіть кілька правильних відповідей

List

Map

Set

Queue

What is the purpose of the List interface in Java Collections?

Виберіть правильну відповідь

To represent an unordered collection of elements

To represent a collection of key-value pairs

To represent an ordered collection of elements with duplicates allowed

To represent a synchronized collection

What is the key feature of the Set interface in Java Collections?

Виберіть правильну відповідь

It does not allow duplicate elements

It maintains the order of elements

It does not allow null elements

It allows null elements

Which of the following is a valid implementation of the Set interface?

Виберіть правильну відповідь

HashMap

TreeSet

LinkedHashMap

TreeMap

What is the purpose of the Map interface in Java Collections?

Виберіть правильну відповідь

To represent an ordered collection of elements

To represent an unordered collection of elements

To represent a collection of key-value pairs

To represent a stack data structure

Which implementation of Map does not allow duplicate keys?

Виберіть правильну відповідь

HashMap

LinkedHashMap

TreeMap

HashTable

Which method is used to obtain a stream from a Collection in Java?

Виберіть правильну відповідь

stream()

collectionStream()

getStream()

createStream()

Все було зрозуміло?

Секція 4. Розділ 6

Зміст курсу

Java Data Structures

1. Basic Data Structures

Introduction to Data Structures List and ArrayList Challenge (ArrayList)CRUD operations LinkedList Implementing our LinkedList Challenge (LinkedList)Section 1 Summary

2. Additional Data Structures

Queue Deque Queue Practice Stack Challenge (Deque Practice)Section 2 Summary

3. Map

What is Map?HashMap<>HashMap Practice Map with Other Data Structures Section 3 Summary

4. enum & Stream API

enum Challenge (Character Class)Stream API Method Reference Stream Practice Section 4 Summary

Java Data Structures

Section 4 Summary

Congratulations on completing the course on data structures!

You've done a great job, and now you deserve to receive your certificate. Data structures may seem challenging at first, but the more you practice, the easier it becomes to master them.

The last section might have seemed particularly difficult, but do we ever learn something without facing challenges? Difficulties toughen us up and add to our knowledge and experience. I've prepared a quiz for you that will help refresh your memory and test the knowledge you've gained during this course.

And here's a piece of advice for you: practice is the best friend of any programmer. The more you practice, the better you become. You already have enough knowledge to write small programs or perform complex calculations. In general, you are capable of creating a simple backend for an online store and much more.

Good luck, and thank you for staying with us!

1. What is the Java Collections Framework?

2. Which interface extends Collection in the Java Collections Framework?

3. What is the purpose of the `List` interface in Java Collections?

4. What is the key feature of the `Set` interface in Java Collections?

5. Which of the following is a valid implementation of the `Set` interface?

6. What is the purpose of the `Map` interface in Java Collections?

7. Which implementation of `Map` does not allow duplicate keys?

8. Which method is used to obtain a stream from a Collection in Java?

What is the Java Collections Framework?

Виберіть правильну відповідь

A language feature in Java

A set of classes and interfaces for handling collections of objects

A built-in database in Java

A tool for debugging Java code

Which interface extends Collection in the Java Collections Framework?

Виберіть кілька правильних відповідей

List

Map

Set

Queue

What is the purpose of the List interface in Java Collections?

Виберіть правильну відповідь

To represent an unordered collection of elements

To represent a collection of key-value pairs

To represent an ordered collection of elements with duplicates allowed

To represent a synchronized collection

What is the key feature of the Set interface in Java Collections?

Виберіть правильну відповідь

It does not allow duplicate elements

It maintains the order of elements

It does not allow null elements

It allows null elements

Which of the following is a valid implementation of the Set interface?

Виберіть правильну відповідь

HashMap

TreeSet

LinkedHashMap

TreeMap

What is the purpose of the Map interface in Java Collections?

Виберіть правильну відповідь

To represent an ordered collection of elements

To represent an unordered collection of elements

To represent a collection of key-value pairs

To represent a stack data structure

Which implementation of Map does not allow duplicate keys?

Виберіть правильну відповідь

HashMap

LinkedHashMap

TreeMap

HashTable

Which method is used to obtain a stream from a Collection in Java?

Виберіть правильну відповідь

stream()

collectionStream()

getStream()

createStream()

Все було зрозуміло?

Секція 4. Розділ 6

some-alt