The program for creating Java applications. Download program without registration and SMS - Programming - Java

Java Development Kit (JDK) is a free set of tools for developing applications of any complexity in the Java programming language.

Description jdk.

JDK from Oracle is a set of tools that are needed to develop applications in the Java language. The package includes various classes, libraries, Java Runtime Environment (JRE) - a virtual machine that makes it possible to run Java applications on any devices with any operating system. That is, the presence of JRE makes programs in the language of Java crosspoltform. By the way, if you need only. Also, you can find complete documentation for functions and Java classes.

What, unfortunately, is not included in the JDK kit, this is an integrated development or IDE environment. Therefore, a programmer working with JDK should use third-party code editing tools. It can be both ordinary text editors and full-fledged IDE. Moreover, there are such development environments that already have built-in functions to work with Java programs. Using such programs, you do not have to compile the program using the command line. Therefore, it is worth thinking about purchasing or downloading an integrated development environment.

For those who want to deal in detail in Java, you can view and explore all the source codes and data, including source Java compiler.

Specifications:

Version: Java Development Kit (JDK) 8U201, 8U202
Russian language
Status: Free

Java is a technology for the full functioning of applications and software components. Modern developers rarely when do without java when creating games. It is for this reason that users are encouraged to install and regularly receive Java Runtime Environment (JRE) updates.

Language java programming Allows you to write software to work in browsers, develop various server applications for Internet forums, online stores, online polls.

With the help of Java, you can process HTML-forms and create optimally adapted for users services and services, combining different modules.

In addition, if Java is not installed on your computer (download for free, let's say you did not have time), then a number of applications, games and websites on your PC simply will not be launched, because it is this software that provides their speed and reliability.

Java features:

automatic memory management
creating multi-threaded applications
access to databases, generalization support
detailed processing of exceptional situations
simultaneous execution of several programs
wide range of input / output filtering
classes for performing HTTP requests and processing answers
simple tools for creating network applications
standard collections: array, list, stack, etc.

The software components written in Yava are broadcast to the byte code, which, in turn, is performed by the so-called Java virtual machine - a program serving as an interpreter. The advantage of such an algorithm is independence from operating system and equipment. Therefore, the same Java application can work on different devices with the same success.

And although the programmers are common among the programmers that the software on Java has less speed and takes a greater amount of memory than, let's say, created by language C when it comes to web development, a number of advantages are posted by us on the leader's place. This language Used not only at billions of PC, but also on Smartons, various communicators, and even in TVs. Java is especially popular among online game developers. Yes, and the gamers themselves will not be able to access all settings, for example, if not downloading Java for minecraft.

It is important that you have always installed the latest version of Java - free download for Windows 7, 8, 10, Vista, XP can be made of this page or on the official website. Thus, you take care of the effective and safe work of Java applications.

You also have the opportunity to download Java for 64-bit browsers with the Windows 64 Bit operating system.

Java is an object-oriented programming language created by James Gosling in 1995, which means expressing variables as objects with fields (which are attributes describing the object) and methods (actions that the object can perform). Java is a language that allows you to write programs that can be run under any Java virtual machine. Since it is quite voluminous by the number of words, the programming language, it is enough to just understand and explore even beginners. This manual sets out the introduction to Java programming.

Steps

Writing the first Java program

In order to start writing programs on Java, first install the developer environment. Many programmers use an integrated development environment (eng. Integrated Development Environment - IDE), such as Eclipse or NetBeans, but you can create a program without it.

Any notepad program will be enough for Java programming. Some programmers prefer to use text editors based on Vim and Emacs. There is also a fairly good text editor that can be installed both on Windows and Linux (Mac, Ubuntu and so on) - Sublime Text. We will use it in this review.

Make sure you have installed application developer in Java Java Development Kit. He will need you to compile your program.

If your computer runs on operating windows systems And the environment of variables is incorrect, it can produce Javac error. Read to get more detailed information Installation to exclude this error.

Hello World

To begin with, we will create a program that will issue Hello World inscription. Create new file. in text editor And save it as "HelloWorld.java". "HelloWorld" is a class name that must match the file name, it is important.

Set the class and main method. The main method of Public Static Void Main (String Args) will be used each time the program is launched and will be installed in each subsequent Java program.
public Class HelloWorld (Public Static Void Main (String Args) ())

Enter the code string "Hello World."
System. Out. PrintLN ("Hello World");
- Consider the components of this code string:
  - SYSTEM refers to the system indicating certain actions.
  - OUT informs the system that we are going to introduce some data.
  - PrintLN Input Row - tells the system to disable the value to the screen.
  - Braces around ("Hello World") indicate that the System.out.printLN () method selects this value as a parameter.
- Take a note of several rules that need to be followed by programming in Java:
  - At the end of each line of the code you need to put a point with a comma.
  - Java is sensitive to the register, so it is necessary to write the values \u200b\u200bof the method, variables, and the name of the class is needed.
  - Code blocks that refer to a specific method are divided into curly braces.
Connect all together. Ultimately, your Hello World program should look like this:
public Class HelloWorld (String Args) (System. Out. PrintLN ("Hello World");))
Save the file and open the command prompt or terminal to compile the program. Go to the folder where you saved the HELLOWORLD.JAVA file and enter in Javac (Java Optimizing Compiler) HelloWorld.java. So you will know the compiler that you want to convert the file. If errors will pop up in the process, the compiler will notify you about what you did wrong. Ideally, you should not have any notifications from the compiler in the process of converting the file. Upon completion of the compilation, look into the folder where the HelloWorld.java file was saved, the HelloWorld.class file should appear there. It will be used to start a Java virtual machine.
Run the program. Finally, we got to this point! IN command line Or terminal enter in java helloworld. The virtual machine will understand in such a way that you want to run the HelloWorld class. HelloWorld should appear in the console.
Congratulations, you created your first Java program.

Enter and output

Now we need to expand your Hello World program so that it perceives data entry by the user. In our program, we printed a string that is visible to the user, but in interactive programs, users enter data in applications. Our task is to expand the program to request a name from the user, and then welcomed it by name.
Import Scanner class. Java has built-in libraries to which we have access, but we need to import them. One of these libraries is Java.util, which contains an object of the scanner, which we need to enter data by the user. In order to import this class, we need to add the next line into the source code.
Import java.util.scanner;
- So we will inform the program that we want to use the Scanner object, which exists in the java.util package.
- If we want to access all objects in the java.util library. We need to simply import java.util at the beginning. *.
You must enter a new variable in the SCANNER method. Java is an object-oriented programming language that operates variables through objects. The scanner is an example of an object having fields and methods. In order to use the Scanner class, you need to create a new Scanner object, with which we can fill in the fields. For this we prescribe the following:
Scanner UserInputScanner \u003d New Scanner (System.in);
- userInPutScanner The name of the scanner object, which we have just installed. Take note that the name is written in the Gorbat Register. This is an agreement to apply variable names in Java.
- We use a new operator in order to create a new instance of the object. In our case, we have created a new instance of the Scanner object by specifying in the New Scanner code (System.in).
- The Scanner object picks up a parameter that reports the object that needs to be scanned. In this case, System.in is a parameter. System.in informs the program that you need to scan data entered by the user.
Next, it should be done clear to the user the need to enter data into the console. This can be done using the System.Out.print or System.Out.PrintLN command.
System.Out.print ("What" s your name? ");
Make so that the scanner object picked up the next line that the user enters and saved it as a variable. Scanner must always collect data entered by the user. The following code of the code will give the SCANner object to recognize the name written by the user and save it as a variable:
String UserInputName \u003d userinputscanner.nextline ();
- In Java, confirmation of the object method is set by ObjectName.Methodname (Parameters) parameters. The line of the code userinputscanner.nextline () calls the Scanner object using the name assigned to it, and then we call the NextLine () method to which the parameters cannot be specified.
- Take a note that we save the following line in another object - String. It is indicated in the userinputname code
Print greeting for the user. After we have saved his name, we can print a greeting for this user. Remember the System.Out.PrintLN line ("Hello World"); Which we used in the main file with the class extension? All the code you have written should be located above this line. Now we can change this line so that it takes the following text:
System.out.PrintLN ("Hello" + userinputname + "!");
- You must enter "hello", username and exclamation point Using the code of the "Hello" code + userinputname + "!" . This is called rowing.
- We have three lines: hello, ", userinputname, and"! ". Lines in Java are unchanged and cannot be edited. Therefore, by combining them, we have created a new line that contains a greeting.
- After that, we use this new line as a parameter for System.Out.printLN.

Java - object-oriented programming language and based on its basis Applied software platform. Java is a medium to run web sites, online stores, forums, remote banking, virtual navigation maps, training programs, questionnaires and games online, as well as other specialized web applications. Often do without this software platform simply does not work, but there is always possible to download Java to a computer with Windows 10, 8.1, 8, 7, Vista and more. The main difference of the Dzhava project was that he allowed to create software that does not need in compilation for each processor architecture and operating system. Permanent link: Site / RU / Platform / Java

Brief history of Java technology and condition today

Java was developed by Sun Microsystems in 1991-1995, and later the technology was acquired by Oracle. Release new version Dzhava was developed in the interaction of Oracle programmers with representatives of the World-Java eco-system, Open JDK and JavaCommunityProcess. Today you can download Java 64-bit or 32-bit for Windows 10, 8, 8.1 (for desktop PC), 7 SP1, Vista SP2, Server 2008 R2 SP1 64-bit, Server 2012 and 2012 R2 64-bit to work with internet browsers Explorer 9 and older versions as well Mozilla Firefox.. Package software Java consists of four software components: JRE executive environment responsible for the design of applets, a virtual java machine, interpreting byte code, basic classes and auxiliary libraries. Today, Java Runtime Environment can deploy server java applications, establish a browser connection with a Java platform. Also worth paying attention to free programs with similar functionality: Microsoft. Net Framework., MICROSOFT SILVERLIGHT plugin, Adobe Flash Player., Adobe Shockwave. Player in the Platform and Environment section.

Java in comparison with popular programming languages

The main advantage of Dzhava is the platform independence. Developers promise speed, resistance, safety and recommend last version Java free download without registration from the official site. However, according to reviews and comments of IT specialists, applications on Java, take more memory, have less speed and responsiveness to opposition to the analogues on C or C ++. But Java has a number of security and reliability advantages compared to languages \u200b\u200bas: C, C ++, Python, Fortran, Ruby, PHP, JavaScript and others.

The advantages of the platform-independent implementation of Java

Developers argue that any Java Applet is perfectly performed on various devicesworking under the control of various operating systems. Almost any intelligent device is possible to download Java for free and successfully install, regardless of whether the operating system is running this device. This option is called not just a cross-platform, but by platform-independent implementation. The advantage of this method of operation of programs has become the complete independence of the program code from OS and equipment. This feature allows you to work by Java applets on any compatible level. virtual machine device.

Java's advantages include:

Reliable and secure applications and games,
- work in multi-threaded mode,
- perfect functionality for network computing,
- powerful tools for running network programs,
- reliable protection and encryption information
- direct access to Web services,
- Work with Java applets on the Internet,
- productive interaction with OpenGL and DirectX through Swing,
- Gifwriter to work with animated GIF files,
- Full support for Unicode.

Java security system organization and updates

The impenetrable java security system is due to the fact that the execution of the application is controlled by JVM completely. Excess authority, for example, unauthorized use of data or sending information, immediately interrupted. The high level of JRE security is maintained by the maintenance of a black certificate list and JAR files. By default, you can run only verified applications with a digital signature. Users previous versions It is recommended to remove everything outdated by, free download Java for Windows 7, 8, 8.1, 10, as well as outdated Vista and server windows 2008 and 2012 and install the latest version on the computer. Obsolete Java may have vulnerabilities that unsafe. To maintain a high level of security, you should regularly install updates. In minor changes, indexing does not change, and the word UPDATE (letter U) is used, but they are no less important. Not surprising if the last java version Download for Minecraft, Prince of Persia, Solitaire, Need for Speed., GTA, Zona programs, Tequilacat Book Reader, E-666 dietary supplements, remote banking or other new software. Moreover, free download Java for minecraft and other java games is simply necessary for quality video, access opportunities to all settings and normal network gameplay.

How to install java on a computer

To correctly install Java on a PC, you first need to remove everything. To delete outdated software, use the standard feature: Start - Control Panel - Delete Program. Next, you need to download Dzhava for Windows from ProgrammyWindows.com, respectively, 32- or 64-bit installation file, observing the discharge of the main browser, close all browsers and working programs. When everything is ready, you can run the installation, and at the end of the installation - restart the computer. If 32-bit, and 64-bit browsers are used on the computer, both version of Java (32-bit and 64-bit) are installed, for compatibility of java modules with all browsers.

On java exists a large number of, and sometimes it is difficult to decide on their choice. It also happens that the user downloads a program that does not support the desired programming language, after which it has to look for another. In this article we will present a number of working programs, as well as select training programs for Java programming programs. Of course, we can not imagine all programs, because they are quite a lot. However, the most popular and interesting you still can see here.

Programs: Java Programming Language

In this list we will present several programs that will help you cope with this situation.

Powerful working environment for creating cross-platform programs on Java and other popular languages. It is free, a big plus is that it is compatible with Linux.

Intellij idea

Created by Jetbrains free programhaving 2 versions for different types Developments:

Ultimate - serves to develop web applications and programming for the phone, as well as for programs for the enterprise. It is paid, but has free trial period.

Community. - Created for programming on Java, Groovy, Scala, as well as for Android applications. It should be downloaded and needed. To do this, it is enough to make a few simple steps:

Let us turn to the official website of Jetbrains.
Throw back to the Tools section.
Select the Intellij IDEA program.
Click the download button.
Download the program for our operating system.

Educational programs for programming on Java

There are many programs and games for learning programming languages, some of them we will now consider.

Let's start, perhaps, from the most interesting for the majority, namely: games for learning programming languages.

Codingame.

Excellent website where you have to write your own artificial Intelligence Using any programming languages. You have to solve interesting and fun challenges, along the way you will learn.

Code Hunt.

In this game you are a hunter for the code. Supports only 2 languages \u200b\u200b- this is Java and C #. In the game you will have to go through 14 levels, each of which has its own tasks.

The popular platform for younger ages and students with which you can compete with writing code in some programming languages, such as Java, Coffeescript, JavaScript, Lua, Python. Clans and even the plot, the interaction with the players - all this draws you into fascinating learning.

Robocode.

By the name of the game it is clear that you will have to create your own robots in Java, and after letting your creations on the battlefield.

Codewars.

If you do not want to create robots, and compete with friends, solving real tasks, then this game is undoubtedly for you.

Resources for studying java

There are also sites on which you can study programming languages \u200b\u200band solve problems there. About multiple sites now and will be discussed.

Coursera.

On this resource you will find many courses in programming languages, there is Russian localization. The site is free, but there is an additional content for which you have to pay. For example, you can watch the material from leading universities in the world for free and perform practical tasks that do not require verification by third-party persons. But if the work will be checked by other people or teacher, then you will have to fork out from $ 49 (3200 rubles) per month.

A resource similar to Coursera (with the same fee), however $ 49 (3200 rubles) you are taken not for checking tasks, but for obtaining a certificate for the passage of courses. And the rest of the materials will be available to you for free.

"Intuit"

This time is a domestic site where you can free or from 500 rubles a month for the tutor services to pass courses and get good knowledge that can help you in life. If you want to learn for free, you can do it yourself, and if you wish to have a personal tutor, you will have to fork out for a small amount.

Let's summarize

There are many more sites, programs or games that will help you learn to program or can be used as a working environment. But to describe and know all programming programs on Java is not at all necessary, it is enough to simply pick up one single to which you get used to and where you will be convenient to develop or learn. In the end, the choice remains only for you.