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Java programs for the phone. Quick start in Java: from installing the necessary software to the first program

Free java programs for your mobile phone. Download applications for java phone for free. The best programs for java.

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Phone software. Download applications for mobile.

In the modern world, there are probably no people left who would not have a cell phone in their pocket. Therefore, many developers are working to write an abundance of various java programs that will simplify the use of your mobile. Recently, the use of antiviruses, photo editors, mini-versions of social networks and browsers has become relevant. Therefore, in the spaces of the Internet every day there are more and more programs for mobile phones, which over time take deeper and deeper roots into our lives.

At work and in everyday life - they are now needed by a modern person everywhere, in absolutely every field of activity and at any time of the day. Most use applications for java phones regularly. Going to bed, people start an alarm clock in the morning, or even several. When planning a work schedule, many people need calendars, all sorts of reminders and timers. When waking up for work or school, the first thing everyone looks at is the weather, not only the one outside the window, but what will be in three hours, in the evening or sometime else. Those who cannot afford to go to the gym arrange home workouts for themselves. Tourists or just residents of megalopolises need to have good maps with navigators. And people who like to walk up late and have fun in clubs need to have a flashlight in their pocket.

A variety of programs for the phone are waiting for those who are going to take state exams, who are planning to travel around the world soon, who like to read a lot or just have fun. Perhaps you just don't like the display or want something new in your phone? Tired of the old and completely boring alarm clock ringtone and want a fun and colorful variety? In our catalog you can download programs for the phone that will suit everyone's taste, and which will take root in your rhythm of life for a long time.

We offer a variety of phone apps to make your mobile experience easier. Here you will find everything you want. Our assortment includes a wide selection of photo editors, maps of the area, social networks, various games, alarms, translators and much more .. Absolutely everything is free and available to anyone.

If you need to queue for a long time at the desired office of the clinic, ride a boring metro or wait for the arrival of a bus, wait for a friend who is always late, or just do something exciting for your leisure, then java programs for your phone are a good choice for everyone. There are many different types of programs, so everyone will find something to their liking. Multimedia, office, reference books, for study, chats, for working on the Internet - everything is here. You can get the desired program simply by downloading it from our website.

The virtual fortune teller is a fairly extensive collection of different Gypsy layouts on a deck of 36 cards. It has such layouts on the cards as the black kind - a fairly simple layout that will answer your wish come true, or not, Gypsy, to the Beloved, to the Desire, etc.

download Virtual Fortune Teller >>

Do not expect a miracle of divination from a psychological test, take it, and find out what most people think of you. Draw conclusions and you can change your life for the better. This collection contains about a hundred different tests. All of them are divided into topics (above you can see the topics and the number of tests in each of them). I do not think that working with psychological tests will be difficult. Everything is quite simple and clear. You answer questions and get results.

download Collection of psychological tests (p.Tests) / Sbornik psihologicheskih testov >>

The recipe book, for your mobile phone, contains recipes for all occasions. Each of these recipes has a photo of the dish described, the necessary ingredients are indicated, the cooking process and tips are described in detail. Imagine all this on your phone!

download Culinary / CulBook >>

At the moment, you will not find anything similar in terms of the amount of material and the quality of graphics. SDA2 category CD contains all the necessary material for self-preparation for passing the theoretical exam on knowledge of traffic rules.

download Rules of the Road 2: CD (SDA 2: CD) / PDD 2: CD >>

At the moment, you will not find anything similar in terms of the amount of material and the quality of graphics. SDA2 category AB contains all the necessary material for self-preparation for passing the theoretical exam on knowledge of traffic rules.

As you know, Java is one of the most popular programming languages ​​in the world and knowledge of it will significantly increase your importance 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 that contains 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 IDEs exist for Java. Also you will write your first Java program.

Installing the Java Development Kit

  1. Go to the Oracle website and download the JDK for your platform.
  2. Once downloaded, extract the resulting archive and run the extracted application.
  3. During the installation process, select the "Development Tool" option and click "Next".
  4. After a while, 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.

JDK setup using Windows 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 the properties of your computer, open the "Advanced" tab, click "Environment Variables ...". In the window that opens, create a new variable, name it Path, paste the previously copied path into its value.
  3. Now comes the most important thing. Open a command prompt 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 doesn'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 set of software tools used by programmers to develop software. The IDE makes it easy to write, run, debug, and test your code.

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

Notebook

Yes, and you can write code in notepad! For development, you just need to install the JDK and specify the path to it. Write the code in notepad, compile using the command line. However, for developing complex programs, this is not the 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 other programming languages ​​for desktop and web development as well. It is completely free, you can download it from the official website. Here are just some of its features:

  • code formatting;
  • installation of third-party libraries;
  • simple graphical interface;
  • and many many others…

Eclipse

Eclipse, like Netbeans, is one of the more 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 site. Advantages:

  • the ability to format the code the way you like;
  • support for splitting code into modules;
  • ease of use of the same code in different projects;
  • drag and drop;
  • viewing the contents of libraries;
  • user-friendly interface.

IntelliJ IDEA

IntelliJ IDEA is a well-known IDE for Java, written, oddly enough, in Java. Equipped with unique tools and allows you to navigate the program without any problems. Finding errors and debugging code has never been easier with IntelliJ IDEA.

JCreator

JCreator is the most advanced and fastest Java IDE 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 make sure everything works and you're ready to learn the language. You will become familiar with the basic structure of Java code and create your first program! It is worth noting that before learning Java, you should familiarize yourself with at least the simplest principles of object-oriented programming.

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

Java program structure

The source code file contains several classes - these are parts of the program that have certain functions. It is good practice to split your program into multiple source files, each with a different purpose. Classes contain methods - actions that objects of a given class can perform. 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 the process is not very different in other IDEs. Select "File" at the top, then hover over "New", in the menu that opens, select "Java Project". In the window that appears, enter the name of the project and other settings you need (if you are not sure what to do, then you can just leave everything as it 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 choose New → Class. Give the new class a name (first in this example) and click Finish.

Let's start writing your first program. Traditionally, this is a program that displays "Hello, world!"

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

Let us analyze in parts what we have written:

  • 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 is a keyword indicating that you are declaring a class and not anything 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, instead of println, you can write print, the only difference is that in the case of println, an additional line feed character will be displayed.

Okay, you've written your first program. Now you need to start it. To do this, just click the white arrow in the green circle on the top panel (when you hover over it, “Run” should be highlighted). After clicking, the console will open at the bottom, in which you will see the message "Hello, world"! Congratulations, you've written your first Java program and are ready to dive into the fascinating world of Java!

Without this software, you will not be able to run a huge number of web applications, chat on forums, use online services and make purchases in virtual stores. You will also have to forget about participating in a number of popular online games. That is why Java is one of the most essential applications on the PC today. It is especially important to download the latest version of this platform, because its updates occur quite often, and hardly anyone wants to stay with an irrelevant version. New releases improve performance, security, and stability.

The technology in question is also a programming language - it allows you to write commands and create software components. Modern developers actively use this language to create server applications and components responsible for comfortable work in browsers.

Opportunities:

  • open access to databases;
  • simple tools for creating and configuring network applications;
  • automatic memory management;
  • detailed handling of exceptional situations;
  • catalog of means for filtering input / output;
  • access to web services;
  • full-fledged work with forums, online stores, questionnaires, games and applications on the Internet;
  • different classes for making HTTP requests and handling responses;
  • support for multi-threaded applications;
  • simultaneous execution of several programs in the corresponding language.

Principle of operation:

Java software includes the JRE, the JVM virtual machine, platform base classes, and supporting libraries.

The JRE is the so-called execution component that enables applets and applications to run in the browser.

Java virtual machine is a kind of interpreter. The algorithm laid down by the developers assumes that the same Java application will work equally well on different devices with different operating systems.

Pros:

  • Java technology can be downloaded free of charge for Windows 7, 8, Vista or XP;
  • provides high-performance operation of web applications and online games.

Minuses:

  • there are complaints from users about speed and responsiveness.

Most often, this software is necessary for those who often deal with online games. High-quality display and access to settings are simply impossible without it. Therefore, experienced gamers are advised to download Java for Minecraft or other online games in order to be able to enjoy epic battles with other players. Active surfers on the world wide web will also appreciate all the benefits of installing this technology. Indeed, at the moment, a similar programming language is one of the most used among web developers.

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