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Java Essentials
4.7+
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Beginner
Embark on a comprehensive journey into the realm of Java programming. Whether you're just starting or have some coding experience, this track will equip you with the knowledge and skills to excel as a Java developer. Mostra di più
java
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Try Codefinity TeamsWhat you will learn
- Build a strong foundation in Java by learning essential syntax, data types, and control structures
- Expand your Java knowledge with advanced concepts, enhancing your ability to write efficient and maintainable code
- Master Object-Oriented Programming (OOP) principles, including encapsulation, inheritance, and polymorphism
- Learn how to work with data structures in Java, such as lists, sets, maps, and queues, to optimize performance
- Understand the fundamentals of unit testing using JUnit, covering different types of testing methodologies
- Dive into Java multithreading to develop high-performance applications that execute multiple tasks concurrently
- 216 chapters
- 32 hours
- 376 tasks
Trusted by employees of leading companies
Learning track content
Module 1 / Java Basics
Discover the unique features of Java and understand why it's a recommended programming language to learn. Write your first Java code and explore how to print text to the console.
Learn the basics of programming, dive into primitive data types, and explore operations with them. Write code that performs mathematical tasks and evaluates conditions for seamless execution.
Explore various loops such as for, while, and do-while, which are essential in any programming language. Loops enable efficient iteration over large datasets, saving significant time. Apply them extensively in tasks like sorting, working with arrays, collections, and more.
Learn how to effectively use arrays in Java programming by discovering how to group data into arrays and exploring common methods and properties for working with them. Techniques for manipulating and optimizing arrays in real-world applications will also be examined.
Learn about String, a crucial data type in Java, and discover its many built-in methods and operations. Explore String and StringBuilder, understanding their basic methods and how to use strings effectively in Java.
Module 2 / Java Extended
Throughout the following lessons, you will become acquainted with the inner workings of Java and discover optimized methods to work with the language. This will involve exploring Java's operations at the computer level and adopting best practices for utilizing familiar concepts efficiently.
You have already encountered methods, and now you will finally understand what they actually are, how to create your own methods, and how to work with them. You will learn to return the desired values from methods and significantly improve the quality and logic of your code.
Get ready to dive into the world of String and discover more about its inner workings and methods. We'll explore the fascinating features that String offers, including the ability to customize the "toString" method, split strings into substrings, and utilize indexes for efficient data retrieval. Let's embark on this exciting journey to expand our knowledge of String manipulation!
In this section, you will learn how to create your own classes and their objects. You will be able to use methods of one class within another and establish relationships between them. Get ready to discover many interesting concepts and delve deeper into OOP programming!
In this section, we will continue our study of classes. We will explore more advanced usage of class objects and learn more about access modifiers and how to use them effectively. We will also delve into getters and setters, as they are considered best practices in programming.
Finally, we can start learning Object-Oriented Programming (OOP) in Java. It will be challenging, but I'm confident that you'll succeed! In this section, we'll cover all the principles of OOP, explain why OOP is important. You'll learn how to inherit classes, overload and override methods, encapsulate data from other classes, and work with abstraction. Moreover, you'll reinforce all these theoretical concepts with practical exercises, working on assignments in your IDE. You'll gain a wealth of knowledge, both practical and theoretical, so let's get started!
In the previous section, we concluded that all Object-Oriented Programming is mainly built on abstraction. However, an abstract class has one significant limitation – you can inherit from only one abstract class. But what if we need more?
Interfaces come to the rescue. In this section, you will learn what an interface is, why it's necessary, how to use it correctly, and you will continue practicing Object-Oriented Programming. Let's turn you into a professional!
Module 4 / Java Data Structures
Discover the concept of lists and explore the most commonly used types in Java. Learn how to create, modify, and manage lists efficiently. Understand their internal structure and discover when to use ArrayList vs. LinkedList based on performance. Implement your own singly linked list and reinforce key concepts through practical coding challenges.
- Introduction to Data StructuresAnteprima
- List and ArrayList in JavaAnteprima
- Challenge: Library Management SystemAnteprima
- CRUD Operations in JavaAnteprima
- LinkedList in JavaAnteprima
- Implementing LinkedList in JavaAnteprima
- Challenge: Implementing size and delete Methods in LinkedListAnteprima
- Quiz: Fundamental Data StructuresAnteprima
Learn about data structures that are not as commonly used but are still valuable. Data structures like Set, Stack, Queue, and Deque will help you better understand how Java works and their various applications in databases.
Learn about key-value pair-based data retrieval, enabling the creation of structures similar to databases. Discovery of concepts like hashcode and exploration of data structures such as HashMap and HashSet are also included.
Learn to use enum for defining a fixed set of constants and explore the Stream API to process, filter, and transform data efficiently.
Module 5 / Java JUnit Library. Types of Testing
Let's talk about types of testing and which testing methods developers use. You will learn about the stages an application goes through before being delivered to the client and the specific tests you will need to write.
In this section, we're going to dive into unit testing — you'll get the rundown on its structure in Java and the ins and outs of crafting them the right way. Setting up your IDE, importing necessary libraries, and lots of hands-on practice.
In this section, we will enhance our coding skills by dealing with errors that can also be caught in unit tests. When testing an application, you may come across various errors, and sometimes they should be turned into exceptions. I will explain how to catch exceptions in your code, test them, and handle them properly.
Module 6 / Multithreading in Java
This section will delve into the foundational concepts of multithreading in Java, focusing on the creation and management of threads, and the use of synchronization techniques to avoid conflicts. You’ll also learn how to utilize essential keywords and methods to ensure the accurate and reliable execution of multithreaded programs, providing a solid understanding of how to handle concurrency effectively in your applications.
This section explores synchronized collections in Java, explaining their purpose and the common concurrency issues they are designed to solve. You’ll gain insights into how these collections work, why they are essential in multithreaded environments, and how they help ensure safe and consistent data manipulation when multiple threads access shared resources.
- Collections with Multithreading SupportAnteprima
- Parallel Stream APIAnteprima
- BlockingQueue and its ImplementationsAnteprima
- Сhallenge BlockingQueueAnteprima
- ConcurrentMap and its ImplementationsAnteprima
- Challenge ConcurrentMapAnteprima
- CopyOnWrite CollectionAnteprima
- Examples of Using Collections MethodsAnteprima
This section covers high-level synchronization mechanisms in Java, such as the use of Lock and Condition, semaphores, barriers, atomic variables, and thread pooling with Executors. Each topic is paired with practical exercises designed to reinforce your understanding and help you apply the theoretical knowledge to real-world scenarios.
This section explores fundamental multithreaded programming patterns and practices such as Producer-Consumer, Fork/Join, ThreadLocal, and asynchronous programming with CompletableFuture. You'll work through examples and see the practical outcomes of these approaches, gaining hands-on experience that will enable you to apply these techniques effectively in real-world applications.
Module 7 / Stream API
Discover how Stream API revolutionizes data processing in Java with its expressive and functional approach. Explore its architecture, principles, and key functional features to write concise and efficient code.
- ArchitectureAnteprima
- PrinciplesAnteprima
- What Is a Functional Interface?Anteprima
- Predicate: Data FilteringAnteprima
- Challenge: Filtering Corporate Email AddressesAnteprima
- Function: Data TransformationAnteprima
- Challenge: Income Tax CalculationAnteprima
- Comparable: Natural Ordering of DataAnteprima
- Comparator: Custom Comparison of DataAnteprima
- Challenge: Sorting EmployeesAnteprima
- Consumer: Processing DataAnteprima
- Supplier: Data GenerationAnteprima
- Bi-versions of Functional InterfacesAnteprima
- Challenge: Filtering Users by Two CriteriaAnteprima
- BinaryOperator: Combining Two ValuesAnteprima
Learn about various intermediate operations available in the Stream API that allow you to manipulate and process data in a functional style. These operations, such as filtering, transforming, and sorting, enable you to efficiently work with collections and perform tasks like removing duplicates, limiting results, or handling nested structures. Each operation can be combined to create powerful data pipelines, making your code more concise and readable.
- Transforming Elements with the map() MethodAnteprima
- Filtering Elements with the filter() MethodAnteprima
- Challenge: Factory Product FilteringAnteprima
- Working with Nested Structures with the flatMap() MethodAnteprima
- Arranging Items in Order with the sorted() MethodAnteprima
- Challenge: Selecting the Best Cars on the Production LineAnteprima
- Eliminating Duplicates with the distinct() MethodAnteprima
- Challenge: Factory Quality ControlAnteprima
- Restricting and Skipping Elements with the limit() and skip() MethodsAnteprima
- Challenge: Finding the Top 3 Hardest-Working EmployeesAnteprima
- Intermediate Processing with the peek() MethodAnteprima
Learn about various terminal operations available in the Stream API that allow you to process and retrieve data efficiently. These operations, such as collecting, reducing, and counting, enable you to aggregate results, find specific elements, or perform side effects like printing or writing to a file. Understanding these operations helps you efficiently handle data processing tasks while keeping your code concise and expressive.
- collect() Gathering Stream Elements into a CollectionAnteprima
- Challenge: Build a Custom Collector for Category CountingAnteprima
- Collectors Utility Class for Stream APIAnteprima
- Processing Elements with the forEach() MethodAnteprima
- Handling Values with the Optional ClassAnteprima
- Aggregating Elements with the reduce() MethodAnteprima
- Challenge: Calculating Total Cost with Discounts and TaxAnteprima
- Calculating Stream Statistics with count(), max(), and min()Anteprima
- Retrieving Stream Summary Metrics with summaryStatistics() MethodAnteprima
- Retrieving Elements from a Stream with findFirst() and findAny()Anteprima
- Challenge: Selecting Random Products Within a CategoryAnteprima
- Checking Stream Elements Against a Condition with allMatch()Anteprima
- Challenge: Ensuring Fast Delivery for Expensive ProductsAnteprima
Discover how to apply Stream API in real-world scenarios, improving code readability and efficiency. Learn how to refactor existing code, analyze performance trade-offs, and handle exceptions properly. Will help you write cleaner and more maintainable Java code using Stream API.
Requirements
- A computer with a browser - all browsers are supported.
- Your enthusiasm to enhance your tech skills.
- Everything else needed to start learning and practicing is already included in this course.
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Il materiale è buono, c'è tanto da imparare, tutto per migliorarsi, e la cosa principale è imparare ciò che desideri....
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Grazie a loro sto imparando molto più rapidamente perché ti aiutano a comprendere tutto da zero. È il miglior sito web per chi non ha background in IT...
Yuliana Cadavid
ottimo corso per principianti
ottimo corso per principianti, mettono alla prova le tue conoscenze in ogni lezione...
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Sto apprezzando la mia esperienza di apprendimento di Python con Codefinity. Il metodo di studio autodidatta è fantastico perché posso adattarlo al mio orario...
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È semplicemente perfettamente spiegato! Finora non ho incontrato alcuna difficoltà perché tutto è così ben organizzato....
Ruslan Kravchuk
La cosa principale è imparare e non arrendersi
Il materiale è buono, c'è tanto da imparare, tutto per migliorarsi, e la cosa principale è imparare ciò che desideri....
Matteo Comune
Grazie a loro sto imparando molto…
Grazie a loro sto imparando molto più rapidamente perché ti aiutano a comprendere tutto da zero. È il miglior sito web per chi non ha background in IT...
Yuliana Cadavid
ottimo corso per principianti
ottimo corso per principianti, mettono alla prova le tue conoscenze in ogni lezione...
Elpunzon
Sto apprezzando la mia esperienza su Codefinity…
Sto apprezzando la mia esperienza di apprendimento di Python con Codefinity. Il metodo di studio autodidatta è fantastico perché posso adattarlo al mio orario...
Alexandru Alexandru
È piacevole imparare da Codefinity
È piacevole imparare da Codefinity. È facile e offre buoni esempi di quanto appreso qui...
jacob Templet
Easy to follow along with and provides…
Facile da seguire e offre una sfida nella mia vita quotidiana. La sfida mi motiva a imparare giorno dopo giorno...
Elan
Codefinity è uno strumento di apprendimento completo…
Codefinity è uno strumento di apprendimento completo che ti aiuta a sviluppare le tue competenze come ingegnere del software o data scientist. Gli esercizi sono divertenti e un ottimo modo per affinare le tue abilità...
Thibault
Prima volta che impari a programmare
La prima volta che ho imparato a programmare e ci sono riuscito con Codefinity - Grazie...
Adrien Morel
Ben progettato per principianti assoluti
Ben progettato per principianti assoluti, con un progresso incrementale che mi dà fiducia....
_Gracy
è semplicemente perfettamente spiegato
È semplicemente perfettamente spiegato! Finora non ho incontrato alcuna difficoltà perché tutto è così ben organizzato....
Data Engineer
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