Course: Classes in Java
duration: 7 hours |
Language: English (US) |
access duration: 90 days |
Incompany available
Details
In this course, you’ll learn to work with different Java Classes. You’ll learn about static nested and inner classes in Java that are used when classes have a logical relationship with or are intimately associated with the outer class within which they are defined. You’ll also learn to create and use anonymous classes and learn how they are nested and implemented in interfaces. Finally you’ll explore lambda expressions which allow you to define classes that implement single-method interfaces in a very concise and compact manner.
Result
After completing this course, you'll be able to pick the right kind of class for your use case and correctly implement nested classes, inner classes, local classes, and anonymous classes. You will also have the skills and knowledge to construct lambda expressions in the right way and use Predicates, Functions, Suppliers, and Consumers to process and store your objects.
Prerequisites
No formal prerequisites, however some experience with Java Classes is recommended.
Target audience
Software Developer, Web Developer
Content
Classes in Java
Classes in Java: Working with Static Nested, Inner, & Local Classes
Static nested and inner classes in Java are used when classes
- have a logical relationship with or are intimately associated with
- the outer class within which they are defined. Local classes are
- classes defined within a scope and can only be accessed and used
- within that scope. They're the perfect tools to use when you want
- to limit the visibility of your classes. Through this course, learn
- to create and use static nested classes defined within an outer
- class. Explore how a closer relationship with an outer class can be
- expressed using inner classes and why access modifiers do not apply
- to local classes. And define and use local classes created with a
- code block. When you're finished with this course, you'll be able
- to pick the right kind of class for your use case and correctly
- implement nested classes, inner classes, and local classes.
Classes in Java: Creating & Using Anonymous Classes
- Anonymous classes in Java allow you to define code that use-and-throw. These are classes where you define and instantiate a class simultaneously and which are anonymous, i.e., do not have a name.
- These are perfect in scenarios where you want a class that implements a certain interface but will not be reused beyond where it is defined and accessed.
- Through this course, learn to create and use anonymous classes, recognizing how they are nested, inner, and unnamed classes that either implement an interface or derive from a base class. As you advance, explore some common use cases for anonymous classes.
- When you're finished with this course, you'll be able to create and use anonymous classes in Java correctly, with the correct syntax, and for the proper use case.
Classes in Java: Implementing Functional Interfaces Using Lambdas
- Lambda expressions allow you to define classes that implement single-method interfaces in a very concise and compact manner. This makes code that uses lambda functions easier to read and understand and much more maintainable. Lambda expressions can be made even more compact and readable by the use of method references.
- In this course, you will learn to create and use lambda expressions to implement functional interfaces. You will see that lambda expressions are essentially blocks of code that accept input arguments, perform operations, and return values.
- Lambda expressions can be used in any place where we use anonymous classes or a named class that implements an interface with just a single abstract method. You will see that lambdas can only be used to implement functional interfaces i.e. interfaces that have exactly one abstract method. Such interfaces are usually annotated using the @FunctionalInterface annotation which allows the compiler to detect if the single abstract method contract has been violated for such interfaces. You will understand and implement the four types or categories of functional interfaces, the Predicate, Function, Consumer, and Supplier interfaces.
- Finally, you will round this course off by exploring and implement method references which are essentially even more compact representations of lambda expressions.
- When you are finished with this course you will have the skills and knowledge to construct lambda expressions in the right way and use Predicates, Functions, Suppliers, and Consumers to process and store your objects.
Course options
We offer several optional training products to enhance your learning experience. If you are planning to use our training course in preperation for an official exam then whe highly recommend using these optional training products to ensure an optimal learning experience. Sometimes there is only a practice exam or/and practice lab available.
Optional practice exam (trial exam)
To supplement this training course you may add a special practice exam. This practice exam comprises a number of trial exams which are very similar to the real exam, both in terms of form and content. This is the ultimate way to test whether you are ready for the exam.
Optional practice lab
To supplement this training course you may add a special practice lab. You perform the tasks on real hardware and/or software applicable to your Lab. The labs are fully hosted in our cloud. The only thing you need to use our practice labs is a web browser. In the LiveLab environment you will find exercises which you can start immediately. The lab enviromentconsist of complete networks containing for example, clients, servers,etc. This is the ultimate way to gain extensive hands-on experience.
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