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Learn Java - Comprehensive introduction to the Java programming language
You want that Learn the Java programming language? Then you should get one first comprehensive overview procure via this programming language.
This is exactly the purpose of this article because you are going to be here all important information about the programming language Java, which a beginner should definitely have heard before he really starts learning Java.
Right at the beginning the note: Learning Java makes you a lot of sense, because the Java programming language is a very beginner-friendly, modern and popular Programming language.
So you are definitely investing your time sensibly here. I promise 🙂
1. Overview of the Java programming language
Before you start learning Java, you should first get one overview procure via this programming language.
Good news for you: You must thanks to this article Notmore troublesome research for the individual components of Java, because We have already done this work for you.
Just lean back and watch this short video first, in which I explain to you what Java is roughly said:
Regardless of whether you have watched the video or not, in the following I will now give you an in-depth overview of all the topics that were already touched upon in the video for the brief introduction of Java.
Let's start directly with the most important question:
What is Java actually?
Java is a programming language from Sun Microsystems. More precisely, it is a object-oriented programming language. This means that Java supports a very modern programming paradigm which follows the human thinking very much like. You will get more information on this in the course of this article.
The fact is that Java is now one of the most famous and most widespread Programming languages in the world.
1.2 Which tools do you need to program with Java?
To develop your own applications using Java, you need two important components.
For one thing, you have to look at the Java runtime environment Install (Java Runtime Environment). This includes other important components, such as:
- Java Virtual Machine
- API (programming interface)
- Other program libraries
The most interesting component here is the Java Virtual Machine should be emphasized, as this has the task of executing Java applications. The special thing about this is that the Java virtual machine enables Java applications not directly compiled into executable code (as is the case, for example, with other programming languages such as C), but they are saved as Intermediate step in so-called byte code compiled and by doing this one achieves in short "Platform independence".
Platform independence means that, as a budding Java developer, you can use your programs Not more on a whole specific operating system have to optimize. Instead, you simply write your desired program using the Java programming language and the Runtime environment then ensures in the background that it runs on all common operating systems.
1.3 Possible areas of application of Java
Since Java is a so-called General purpose programming language there are logically not just one very specific area of application. After having learned Java, you have the opportunity for almost any application to program something.
In the following I would like to give you a list of what you can develop with Java, among other things:
- Simple console programs (small programs to make everyday life easier)
- Web applications
- GUI programs (programs with graphical user interfaces)
- and much more...
In a nutshell: With Java you have the possibility annoying everyday tasks tooautomate, to write extensive work software and also entertainment media such as To create video games.
1.4 Time savings through existing frameworks
So that you don't always have to reinvent the wheel, over the last few years numerous Java frameworks developed and also established. In this video you will find out in detail what is meant by a framework in programming.
For example, do you want to graphical user interfaces with the help of Java, you can use the so-called JavaFX Framework To fall back on. On the other hand, do you want one Web application program, then you can, for example, use the Spring framework the easy life.
So you can probably already see what the widespread use and Notoriety of Java for advantages with it, because numerous frameworks have already been developed on which you can easily build.
1.5 This is what Java source code looks like
If you want to learn Java, it is of course necessary to first learn the theoretical foundations to acquire. You have already read the most important basics up to this point. So that you can now imagine how Java source code looks like, I've prepared a small example for you here:
You can find out in detail how this Java source code is to be interpreted in our comprehensive Java tutorial series on YouTube.
1.6 Three important properties of Java
You have already read quite a bit about the Java programming language. To round off this section, I would like to tell you again in the following three important properties List from Java. If these qualities alone stick in your memory, you definitely already have one today Leap forward made, because these summarize the most important content learned before:
Feature # 1: General purpose programming language
The Java programming language is a so-called General purpose programming language. So you don't only use this for a very specific purpose, but you also have the opportunity to to implement various types of projects (e.g. web applications, GUI programs, etc.).
Feature # 2: Object Oriented Programming Language
As soon as you devote yourself to learning Java, it is imperative to understand that it is a so-called object-oriented programming language acts. Object oriented programming is an example of a programming paradigm (programming style). The special thing about object-oriented programming is that it supports the human thinking very similar and therefore also very intuitive can be applied by human programmers.
At this point, however, it would go beyond the scope to provide a detailed explanation on this. But don't worry, we've already prepared an extra blog article on object-oriented programming for you 🙂
Feature # 3: Platform independent
The third important property is that Platform independence to call. As previously explained, thanks to the virtual machine, the Java source code is saved as Intermediate step initially compiled in so-called bytecode. This gives us as programmers the advantage that we can use the same Java code to develop programs for Windows, for Linux, for MacOs, for apps and much more.
(NOTE: Are you a complete novice to programming and do not yet know 100% which programming language you should even start with? Then secure our video series for beginners for FREE now! In this video series you will learn what a programming language is, which programming languages exist and which one you should ideally start with as a beginner. Get the series here.)
Now that you have an overview of the Java programming language, we can turn to the next question that interests a novice programmer who wants to learn Java.
In this section we address the question: Why should you learn Java?
I would like to give you a few points for this in the following.
- Programming beginners in particular should learn Java, as this language is very good beginner-friendly is.
- Java is based on the concept of object-oriented programming. We humans are much better at understanding object-oriented code because this concept is our instinctive thinkingvery much like.
- Java is one very famous and widespread Programming language. Over the last few decades the language has established itself so strongly in a wide variety of areas that millions of applications have been created that were programmed in Java. So learning Java means learning a programming language for which it massive demand gives.
- The Java programming language is a General purpose programming language. I have already discussed this aspect several times in this article, as it is of great advantage, especially for beginners. Reason: You can't really go wrong with choosing Java as you don't have to commit yourself to a very specific topic.
- The aspect of the Platform independence, I would like to mention again as a possible reason to learn Java.
- The last thing I would like to say is the comprehensive class library refer to Java. This has become so complex that there is hardly anyone who has mastered every detail. So you already have numerous classes available, with which you always recurring use cases can implement cleanly.
3. How fast can you learn Java?
So you have already got an overview of Java and have also heard some reasons that speak in favor of learning the Java programming language.
But now there is a question that we have been asked over and over again over the past few years. This reads:
How long or how much time do you need to learn the Java programming language?
A true classic. And also justified, because if you want to learn something new, then of course you also want to know roughly what you are getting into.
For this reason we have an extra and very special for you detailed YouTube video produced:
First of all: Of course, we cannot give you an exact amount of time it will take to learn to program Java. This is also quite logical, because every programming beginner starts with different requirements, has different learning techniques, and so on.
So what is our goal with this video?
Our goal is to give you a rough number of days that you usually have to invest in order to master the basics of Java. By basics we mean that you are already able to first own ideas in the form of Java projects. It is important that you have mastered the following topics:
- What is java (Background knowledge of Java, required software, basic program structure, etc.)
- Variables and data types
- Mathematical operators
- Case distinctions
- Methods / functions
- Basics of object-oriented programming
in the above video you get more detailed information on these topics and also always one rough time estimate in dayshow long it usually takes to properly understand the topic. So it's definitely worth taking a look at the video 🙂
4. How should a beginner learn Java?
Since you have read the article up to this point, you are probably very interested in getting into Java programming. But now you are probably asking yourself one last question:
HOW should you learn Java as a beginner?
There are of course different options here, because as you surely know, there are different ways to Rome 😉
However, especially nowadays, there are certain possibilities with which one reach your goal faster than with others. So if you want to know which ones they are, then this last section is definitely very interesting for you.
The most comfortable and probably most effective solutionTo learn to program Java is to be introduced to Java step by step together with a private teacher. But here there is two problems:
- On the one hand, you have to know or find a person who has the necessary Java skills and teaching skills to teach you Java in an easy-to-understand way.
- On the other hand, this person must also have the necessary time to take care of you.
So this way tends to work well for people who have a good friend who can already program Java and is willing to learn it for you. If this is not the case, you have to hire an expensive private teacher who makes this type of training possible.
Since very many people cannot afford this first variant, they take it up Programming books back. This is one way we definitely do recommend can.
The problem here, however, is that the selection of books is very large and most of the works very extensive are. In plain English, this means that you will most likely find Java books in bookstores that contain over 1,000 pages have.
This large amount of topics in just one book sells well (since you can advertise that you are buying a comprehensive Java work), but we believe it is not ideal for beginners.
We are of the opinion that Java beginners should first learn the basics in a neatly structured manner. And in a way with which they are not overwhelmed.
Exactly for this reason we wrote the Java Beginner's Book from Programming Start.
It is an e-book that you as Teaches beginners from 0 to the basics of Java. The book was specially made in a beginner versionunderstandable language written and contains numerous code examplesso that you can reprogram what you have learned directly. Since it comes from our own production, we can do it too Recommend to every programming beginner with a clear conscience:
Today, however, offers another and above all more effective wayto learn Java: You can also use a Video course Appropriately. For this, too, we have a suitable and for you as a beginner insanely comprehensive video course developed:
This video course goes far beyond the basics covered in the e-book. In addition, are also numerous exercises, Summaries and more useful resources integrated. So if you are serious about learning Java, then you are well served with this course, because this course gives you a user experience similar to that of a private teacher.
Reason: Because of the videos you can see us while programming directly over our shoulders. Just click on the green button for more information about the course and its content.
(NOTE: Are you a complete novice to programming and do not yet know 100% which programming language you should even start with? Then secure our video series for beginners now for FREE! In this video series you will learn what a programming language is, which programming languages actually exist and which one you should ideally start with as a beginner. Get the series here.)
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