Java programming language download program in Russian. How to manually download and install Java for a Windows computer

As you know, Java is one of the most popular programming languages ​​in the world and knowing it will significantly increase your value as a programmer. So you've decided to start writing in this language. You will need to install the JDK in order to write and run Java programs. JDK is a set of software developed by Oracle, containing a compiler (javac), a runtime environment (Java Runtime Environment), a standard language library, examples and documentation. After reading this article, you will learn how to install and configure the JDK on your system, what a development environment is, and what IDE options exist for Java. You will also write your first program in Java.

Installing the Java Development Kit

1. Go to the Oracle website and download the JDK for your platform.
2. After downloading, extract the resulting archive and run the extracted application.
3. During the installation process, select the “Development Tool” option and click “Next”.
4. After some time, the installation will complete.

So, you've installed the Java Development Kit, but that's not all. You need to configure it for your system.

Setting up the JDK using Windows as an example

1. Go to the folder %ProgramFiles%\Java\%version of the jdk%\bin you installed, click on the properties of any file in this folder and copy the path to it.
2. Go to your computer's properties, open the "Advanced" tab, click "Environment Variables...". In the window that opens, create a new variable, name it Path , and paste the path you copied earlier into its value.
3. Now comes the most important part. Open command line and type javac to make sure the JRE is installed and configured. If you get a list of arguments to the javac command, then congratulations, you have successfully installed and configured everything you need to use Java!

After installing the JDK and JRE, it won't hurt to install one of the IDEs on your computer.

Installing the IDE

First, let's figure out what it is IDE.

IDE(Integrated Development Environment) is a complex software, used by programmers for development software. The IDE makes it easy to write, run, debug and test code.

To write complex programs, it is advisable to use an IDE. We will look at the most popular ones.

Notebook

Yes, you can write code in Notepad! To develop, you just need to install the JDK and specify the path to it. You write the code in Notepad and compile using the command line. However, this is not the best solution for developing complex programs. best option due to the lack of any additional features, present in advanced IDEs.

NetBeans

NetBeans is the choice of professional Java developers. It has unique features and tools that will allow you to make your program cross-platform and your code readable. NetBeans supports not only Java, but also other programming languages ​​for desktop and web development. It is completely free, you can download it from the official website. Here are just some of its capabilities:

• code formatting;
• installing third-party libraries;
• simple graphical interface;
• and much, much more...

Eclipse

Eclipse, like Netbeans, is one of the most popular IDEs. It provides an impressive, intuitive interface and a powerful development environment that allows you to comfortably develop Java applications. You can download Eclipse for free from the official website. Advantages:

• the ability to format the code as you wish;
• support for splitting code into modules;
• ease of using the same code in different projects;
• drag-and-drop;
• viewing library contents;
• convenient interface.

IntelliJ IDEA

IntelliJ IDEA is a well-known IDE for Java, written, oddly enough, in Java. It is equipped with unique tools and allows you to easily navigate the program. Finding errors and debugging code has never been easier than with IntelliJ IDEA.

JCreator

JCreator - advanced and most fast IDE for Java, written in C++.

Writing our first program

So, you have installed and configured the JDK, JRE and IDE for Java. What's the next step? Of course, write a program to finally make sure that everything works and you are ready to learn the language. You will get to know basic structure Java code and create your first program! It is worth noting that before learning Java you should familiarize yourself with at least the most simple principles object-oriented programming.

The structure of a Java program can be represented as follows:

Java Program Structure

In the file with source code contains several classes - these are parts of the program that have certain functions. It is a good practice to split the program into several source code files, each with its own purpose. Classes contain methods - actions that objects can perform. of this class. The method contains commands with which you can get the desired result.

Before you start creating a program, you need to create a project, and in it a file that will contain your code. Let's consider creating a project in the Eclipse IDE, but in other IDEs the process is not much different. Select “File” at the top, then hover over “New” and select “Java Project” from the menu that opens. In the window that appears, enter the project name and other settings you need (if you are not sure what to do, you can just leave everything as is) and click “Next”. Done, you have created a project! All that remains is to create a class in it in which you will write your first program. Right-click on your project (it should appear on the right) and select New → Class. Give the new class a name (in in this example- this is first) and click “Finish”.

Let's start writing your first program. Traditionally, this is a program that displays “Hello, world!” on the screen.

Public class first( public static void main(String args) ( System.out.println("Hello, world!"); ) )

Let's look at what we wrote piece by piece:

• public is an access modifier that determines from which part of the program our class can be used. In your example, public is all the code;
• class - keyword, indicating that you are declaring a class and not something else;
• first is the name of your class. Parentheses define the beginning and end of the class code;
• public static void main(String args) - declaration of a public static method (that is, which can be called without creating a class object). The method in the example does not return anything and takes an array of strings as arguments. The only command in this method prints the message “Hello, world!” to the console. Note that instead of println you can write print , the only difference is that in the case of println the line break character will be additionally displayed.

Okay, you've written your first program. Now it needs to be launched. To do this, simply click the white arrow in the green circle on top panel(when you hover the cursor over it, “Run” should be displayed). After clicking below, a console will open in which you will see the message “Hello, world”! Congratulations, you have written your first program in Java and are ready to dive into the fascinating world of this language!

Java (java) is a modern platform for complete and stable operation client-server applications. A huge number of web applications, commercial online services for shopping in online stores, funds for virtual communication and much more, in most cases, operates on the basis of the Java Runtime Environment.

Without installing this software, you are also unlikely to be able to participate in numerous online games via the Internet. Therefore, one of the most necessary applications Today, Java is considered to be for PC.

You can download Java for free for Windows of all versions on our website (link at the bottom of the article).

New versions of software are released quite often, so we recommend monitoring its updates and always installing the latest version, otherwise you risk remaining a user of an outdated application that may not support new features of your favorite program or popular online service. The latest releases of the JAVA platform are developed taking into account modern system requirements, which allows you to create more productive and stable platforms for development and use, ensuring comfortable and reliable work. So, for example, to replace java 7 32 bit (64 bit) for windows comes new version – java 8. Each new release has innovations necessary for modern programs and 8 is no exception.

Besides using Java as software platform for the software user, this technology is increasingly used in programming for writing applets (programs) as a basis for various applications or additional modules to them.

Currently, to create server applications that client Internet browsers work with, developers use this particular programming language, since it truly allows for fast and comfortable work client-server system.

The main potential of the platform:

• unhindered access to database management systems;
• using basic software to configure applications;
• management and optimization of the memory used by the program occurs automatically;
• full support for multi-threaded applications;
• provides open and reliable access to service departments via the Internet;
• Java can be downloaded for free for Windows, Linux, MacOS and other operating systems.
• unlimited potential for use in the development of virtual online stores, games and other interactive services;
• organizing work with HTTP requests and issuing responses to them using separate classes;
• support for simultaneous operation is provided large quantity JAVA programs.

How does Java 32 bit/64 bit work for Windows?

The JVM is essentially an interpreter designed in such a way that the application (applet) is compatible with various devices and operating systems - in other words, the Java machine ensures the cross-platform nature of the Java applet.

Advantages of Java:

Disadvantages of the platform:

Java Runtime Environment is most suitable for fans of Internet games. Most often, gamers download Java in order to use all the capabilities and innovations of developers in games such as Minecraft and the like.
But Java users will also love those who simply enjoy browsing the Internet: modern web page developers often use this programming language to create global Internet applications and online services.

Important Note: if installed on your computer different versions Internet browsers with different bit depths (for example, one for 32 bit, another for 64 bit), then for correct operation Java requires downloading and installing both versions of the program.

Java Runtime Environment (JRE)- provides libraries, virtual Java machine and other components for running applets and applications written in the Java programming language.

Java JRE also contains technologies: Java Plug-in and Java Web Start. Java Web Start - makes it possible to deploy stand-alone applications on the Internet. Java Plug-in - makes it possible to run applets in Internet browsers.

For an inexperienced user, another explanation will be more clear. With the help of Java, web cameras, printers, online games, accounting programs. In other devices, Java controls the operation of: GPS navigators, medical devices, parking meters, and others.

This section contains latest versions Java JRE package to install on personal computer or laptop. You need to select the version and bitness of your operating system, download necessary files and install on your computer.

• Platforms: Windows 2008 Server, Windows 7, Windows 8, Windows XP, Windows Server 2012, Windows Vista, Windows 10
• Java Versions: 7.0, 8.0

The Java programming language is rapidly gaining popularity due to its simplicity and functionality. Many mobile and computer applications written in this language. It is worth noting that applications for Android devices are written in Java.

Download Java is available on the official website completely for free. However, there may be a problem with the program version. First of all, you have to choose between 32-bit And 64-bit version. If the computer allows it, then of course it’s better to stop at 64, it’s not so strict restrictions on memory usage.

Then you need to decide - install Java Development Kit (JDK) or Java Runtime Environment (JRE). Everything is extremely simple and clear if you translate the abbreviation. JDK is a development kit. It is used to create programs in this language.

JRE It only allows you to launch applications. By the way, it is included in the JDK.

Installing the package

Installation is no different from other applications. For example, let's take the package installation JDK.

Environment Variable Settings

Unfortunately, the installer does not make all the necessary settings, so variable environment must be configured manually.

First of all, you will need to indicate variablejava_ home, which contains the path to the folder where Java is installed. This variable use many programs to watch location Java.

Then you need to put it into a variable path register the location %JAVA_HOME%\bin. She's using operating system to see a list of folders where you can find the executable file. She also used For Java launcher from the console.

First you need to go to computer properties. Anyone can do this in a convenient way, for example call context menu My computer and click Properties, or press the combination Win+Pause.

Now let's open Additional options systems, and in the next window go to the bookmark Additionally. Here we go to Environment Variables(button below).

If the system variables are already entered Java_ home then you need it edit. If it doesn’t exist, then we create a new one. Here we will need set path To Java installed. For example c:\Program Files\Java\jdk\ or any other where the installation was carried out.

Now you need to make changes to the variable Path. Here we indicate the path to the folder where it is located executable files, for example %JAVA_HOME%\bin.

Now close all windows by pressing OK, saving the changes.

It is worth noting that for the JDK, the installation folder contains numbers– package version. Therefore, every time you update, you need to change the directory in JAVA_ HOME, otherwise the program simply won’t start.

Removing unnecessary files

Now it remains clean system from unnecessary files. To do this we launch command line(cmd). Then we use the command where java. The console should display the Java installation path. If directory not found– this means the path variable is filled incorrectly. However It happens that the system finds several executable files.

This is due to the fact that installer tries incorrectly tune environment variables. Those. tries to install them into a folder system32 .

This is bad because... system directory gets clogged and you can expect incorrect operation programs. In this case, follow the path indicated in the console and delete all files: java.exe, javaws.exe and javaw.exe. If some of these files are not found, then delete only those located in the folder.