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Java course1/21/2024 ![]() Watch the full course below or on the YouTube channel (4-hour watch). After this course you may understand the Java code in this XDCD comic. ![]() Farhan is an experienced software engineer here at freeCodeCamp and he is great at breaking down programming topics for beginners. And the course covers a newer version of Java than our previous courses.įarhan Hasin Chowdhury created this course. You can follow along with the entire course from within your web browser. We've published Java courses previously but this is one of the easiest ones yet to follow along with as a beginner. We just published a full course on the YouTube channel that will teach you the Java programming language. It is considered a general-purpose, concurrent, strongly typed, class-based object-oriented language. In this course, learners will focus on creation of multilevel inheritance in Java and how such hierarchies include child and grand-child classes that all inherit from a common ancestor base class.Java has been one of the most popular programming languages for a long time. You will be able to initialize member variables: add a member variable into a derived class and ensure it is correctly initialized, even in addition to any invocations of the base class constructor. You will recognize that a base class's constructor is invoked when a derived class object is instantiated and identify what happens when there is a base and derived class that have many different constructors. You will learn how to apply the two ways of initializing derived classes: implement an explicit no argument constructor in the base class or use the super keyword and have only parameterized constructors in both the base and derived classes. When you add your own constructor, you will see that Java takes away the default no-argument constructor it had provided. You will begin by identifying the role of access modifiers and recognizing the basics of superclass constructors. In this course, you will learn the role of constructors and how to use the super keyword in architecting inheritance hierarchies in Java. Finally, learn how one base class can be created with multiple derived classes. To learn Java programming, you should code a lot and you’ll like it CodeGym is an online Java programming course consisting of 80 practice and 20 of essential theory. Explore how to upcast and downcast, and learn how downcasting can sometimes be dangerous. Practice coding from the first lesson of our Java online course. ![]() Following an introduction to the Is-A relationship, you will learn how to recognize, in single inheritance, that every object of the derived class is an object of the base class, but not every object of the base class is an object of the derived class. You will examine how objects of derived classes have independent copies of member variables, even from the derived class. Then move on to recognizing how the methods derived from work, and also how all built-in Java classes possess the methods derived from. Next, learn the concepts of polymorphism, its advantages and applications. ![]() You will then apply inheritance to model real-world entities. Begin with an introduction to inheritance, and how to identify its advantages and applications. In this course, you will explore the basics of inheritance and run-time polymorphism in Java, and how these concepts can be used to model Is-A relationships. Finally, you will learn how to reassign a reference value in a method. As you progress, other key areas include how to add method parameters to overload a constructor, how to pass an Object Reference, and pass a value. Next, you will learn how to use public and private access modifiers, study encapsulation with object-oriented design, and create class setter methods with value checking. Other topics include how to convert strings to their primitive numeric types, ciscover access control, and how to distinguish between the public interface and the internal workings of a class. These include the following: how to create and access static members, how to employ constants to represent unchangeable values, how to change numeric variable types through promotion and casting, and convert data values. During this course, you will discover various static methods and variables and explore a number of topics. Beginner Intermediate Expert Įxplore object-oriented programming concepts and techniques, in Java.
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