JAVA

 JAVA 

Java Programming Tutorial for Beginners

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     Java is a high-level programming language originally developed by Sun Microsystems and released in 1995. Java runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX. This tutorial gives a complete understanding of Java. This reference will take you through simple and practical approaches while learning Java Programming language.

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Applications

According to Sun, 3 billion devices run Java. There are many devices where Java is currently used. Some of them are as follows:

• Desktop Applications such as acrobat reader, media player, antivirus, etc.
• Web Applications.
• Enterprise Applications such as banking applications.
• Mobile
• Embedded System
• Smart Card
• Robotics
• Games, etc.

  

Importance of JAVA

Easy to learn:

Learning anything new isn’t typically easy. Java is a robust language and it would be difficult to get productive with it in a short span of time, especially if you have a steep learning curve. Many would be surprised to see once you are familiar with the program and its initial hurdles it is pretty easy to write a program in Java.

Higher cross-functionality:

Java offers high cross-functionality and portability as programs written in one platform can run across desktops, mobiles, embedded systems. Java is used in a lot of different places. Its write once runs anywhere philosophy allows it to be used in many ways on a wide variety of different devices. It can easily be moved from one computer to another. Most Java applications are built in windows and can run on Linux.

Object-oriented language:

Java is an object-oriented language. It’s one of the few 100 percents object-oriented language, which makes developing OOP applications very easy. That’s another reason that made it a popular language. Because you cannot write a simple program in Java without it being object-oriented. Once you have the knowledge of basic OOP concepts, you can use them with Java. Unlike other programming languages like C++, JavaScript, and Python, OOP is optional whereas in Java it’s really baked into the language as an essential part of Java. Encapsulation, Abstraction, Inheritance, and Polymorphism, are some of the best practices and design patterns in its library.

Mobile app development:

Java is considered to be very useful for scripting games and mobile applications. Java can be used in order to successfully facilitate mobile development, specifically beneficial within the Android app development market. Eclipse is a very popular IDE used for developing Android applications. With the introduction of Android Studio IDE, which is specifically designed for developing Android applications, you can install professional tools that you will need for developing mobile applications.

The Most Demanded Skills

A good Java developer is expected to be familiar with the most common tools used for Java development and have solid experience with them. Here are some of the most in-demand skills, according to the research:

• Spring (includes knowledge of Spring and Spring Boot),

• Android development,

• AWS,

• Git,

• Docker,

• Jenkins,

• NoSQL databases.

An interesting fact about the majority of Java developers is that they mostly use Java 8 version and are merely familiar with Java 9 or Java 10. Thus, employers expect excellent knowledge of Java 8 and all of its powerful features, such as lambda expressions, Java Stream API, default and static methods for interface creation.

As well, employers started expecting Java developers to be familiar with DevOps and being confident with testing. DevOps can become the next step in one’s career growth which is especially important for Senior Java Developers. As for the testing, more and more employers and developers are starting to recognise the importance of testing skills among developers and thus, it is expected that good developers know their way around it. The basic testing tools for Java developers are JUnit 5 Library, Mockito, and Robot Framework.

  

The Most Popular Areas of Java Application

Java is used in a number of fast-growing areas such as:

• Reactive programming,

• Work with Big Data,

• IoT,

• Mobile app development.