Course Content

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 1 Summary

Great, the first section is complete, and now you have a grasp of the basics of the Java Collections Framework. You've learned how to work with wrapper classes, ArrayList, and LinkedList. We even wrote our simplified version of LinkedList, part of which you implemented yourself. Let's take a look at this implementation:

main.java

Yes, the solution turned out to be quite large, so I understand the inconvenience of scrolling through the code in a small window. However, you can run this code and see how it works.

Here are the two methods that you implemented yourself:

SinglyLinkedList.java

Your solution may differ slightly from the one I provided, but that's okay because programming is a creative process, and everyone's code can be completely different while serving the same functions.

Let's go over the main questions that were present in this section:

1. What happens when an `ArrayList` exceeds its current capacity?

2. Which statement is true when comparing LinkedList and ArrayList in Java?

3. What is the wrapper class for the primitive type `char` in Java?

4. Which method is used to add an element to the end of an `ArrayList` in Java?

5. In a `LinkedList`, each node contains a reference to:

6. What is the wrapper class for the primitive type `int` in Java?

What happens when an ArrayList exceeds its current capacity?

Select the correct answer

The ArrayList is automatically resized to accommodate more elements

An exception is thrown, and the program terminates

Elements are shifted to the left to make space for new elements

Which statement is true when comparing LinkedList and ArrayList in Java?

Select the correct answer

ArrayList is more memory-efficient than LinkedList

LinkedList allows for constant-time random access to elements

LinkedList is more efficient than ArrayList for frequent insertions and deletions

What is the wrapper class for the primitive type char in Java?

Select the correct answer

Character

Char

CharWrapper

Which method is used to add an element to the end of an ArrayList in Java?

Select the correct answer

addToEnd()

add()

append()

In a LinkedList, each node contains a reference to:

Select the correct answer

The previous node only

Both the previous and the next nodes

The next node only

What is the wrapper class for the primitive type int in Java?

Select the correct answer

Integer

Int

IntWrapper

Everything was clear?

Section 1. Chapter 8

Course Content

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 1 Summary

main.java

Yes, the solution turned out to be quite large, so I understand the inconvenience of scrolling through the code in a small window. However, you can run this code and see how it works.

Here are the two methods that you implemented yourself:

SinglyLinkedList.java

Let's go over the main questions that were present in this section:

1. What happens when an `ArrayList` exceeds its current capacity?

2. Which statement is true when comparing LinkedList and ArrayList in Java?

3. What is the wrapper class for the primitive type `char` in Java?

4. Which method is used to add an element to the end of an `ArrayList` in Java?

5. In a `LinkedList`, each node contains a reference to:

6. What is the wrapper class for the primitive type `int` in Java?

What happens when an ArrayList exceeds its current capacity?

Select the correct answer

The ArrayList is automatically resized to accommodate more elements

An exception is thrown, and the program terminates

Elements are shifted to the left to make space for new elements

Which statement is true when comparing LinkedList and ArrayList in Java?

Select the correct answer

ArrayList is more memory-efficient than LinkedList

LinkedList allows for constant-time random access to elements

LinkedList is more efficient than ArrayList for frequent insertions and deletions

What is the wrapper class for the primitive type char in Java?

Select the correct answer

Character

Char

CharWrapper

Which method is used to add an element to the end of an ArrayList in Java?

Select the correct answer

addToEnd()

add()

append()

In a LinkedList, each node contains a reference to:

Select the correct answer

The previous node only

Both the previous and the next nodes

The next node only

What is the wrapper class for the primitive type int in Java?

Select the correct answer

Integer

Int

IntWrapper

Everything was clear?

Section 1. Chapter 8