The PYPL Popularity of Programming Language Index maintains that Java is the second most popular programming language in the world, after Python.
Although the programming world is fast-evolving, Java has remained a constant in the programming and software development world ever since its inception. It has evolved and upgraded continually to keep pace with the changing software development needs.
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What is Java?
James Gosling at Sun Microsystems developed and launched Java way back in 1995. It is a general-purpose, class-based OOP programming language that is designed to have minimal implementation dependencies. Java’s syntax is primarily based on C and C++. This allows developers to create stable, secure, and resilient applications that can run on multiple platforms, including Mac, Linux, and Windows operating systems. You can also consider doing our Java Bootcamp course from upGrad to upskill your career.
The best part about coding in Java is that it follows the WORA (write once, run anywhere) principle. Thus, once you compile a Java code, it can run on all platforms that support Java – you don’t need to recompile it.
Java is a versatile programming language as it drives innovation and reduces time and costs significantly. Today, Java is the chosen language for IoT applications, enterprise applications, cloud computing, desktop GUI applications, web apps, mobile apps, embedded systems, Big Data systems, and AI applications.
Java is a very significant language because it is easily portable, it could be moved from one system to another easily. It is secure, provides good support, and is user-friendly. Java has a wide range of applicability, it is used in almost every field such as finance, e-commerce, big applications, etc.
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Why Learn Java?
If you’re still wondering why to learn Java, here are five reasons why you should:
- It is extremely popular and commands a high salary
According to GitHub, Java is used by over 9 million developers worldwide, making it one of the most popular programming languages. Thanks to its diverse and multiple use cases, Java is always in high demand in the market. Consequently, companies readily pay high annual packages to hire experienced and qualified Java developers. Learn more about java developer salary in India.
Java developers are paid high salaries because companies look for good Java developers. Along with that, there is competition in the market which can be matched by constant upskilling. There are certain skillsets that the recruiters are looking for such as-
- Java technologies
- Programming Languages
- It is a versatile OOP language
Java is an OOP language, meaning it includes the core OOP concepts like objects, classes, inheritance, encapsulation, and polymorphism. It is a platform-independent language, which means that Java is compatible with multiple platforms – you can run a bytecode on any hardware featuring a compliant JVM. It is a versatile language because it supports dynamic coding, stores the code in an OOP format, and is highly secure.
The OOP facilitates in the reusability of code, hiding features. The main features of OOP differentiate it from the non-OOP languages, the OOP features such as encapsulation, inheritance, and polymorphism. The OOP also brings other advantages such as abstraction, debugging, scalability, etc.
- It comes with powerful tools
One of the most exciting things about learning and using Java is that it comes with a host of tools to help make software development smooth and seamless. Java libraries like java.lang, java.util, java.io, JHipster, Maven, Guava, etc., and IDEs like Eclipse, NetBeans, and IntelliJ IDEA, expand the functionality of Java significantly. Thanks to these nifty tools, tasks like debugging, automated refactoring, syntax highlighting, etc., become much more manageable. Learn more about Java frameworks.
Java tools help Java developers in facilitating smooth development. With the help of the tools, the developers can test, develop, and deploy. The java developers could troubleshoot the problems using these tools by monitoring the progress. The tools help in doing away with the manual tasks and bring automation as well.
- It has excellent documentation
Javadoc is the documentation generator for Java, and it uses the Java source code to generate API documentation in HTML format. By doing so, Javadoc ensures that Java code has excellent and easy-to-understand references, thereby allowing users to grasp Java code pretty easily.
- A large community backs it
Java boasts of having a large online community of Java developers and users of all levels beginner, advanced, and expert). So, if ever you get stuck while working on a Java project, you can always reach out to the Java community for help.
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Online Java Learning Resources
Leaving behind physical classes and routine schedules to take Java lessons, people are now moving towards seeking online classes to learn the Java programming language from the comfort of their houses. While the pandemic led people to follow a hybrid approach, people are still conflicted to follow whether offline is better or online Java courses. Here are the reasons why you must learn Java using online resources.
- Extensive free resources: Being a widely explored and mature programming language, people have practiced and availed numerous learning opportunities for aspiring programmers to get started with Java. Free resources are available on the web for Java learners to take help from and simplify their Java learning curve. Java free online courses and added certification benefits are some of them. People who wish to enter the field and do not know how to can avail of the free courses and get an understanding of the field, similarly, the professionals who are already in the industry can also avail of the opportunity to learn java free online courses.
- Great community support: Frequent application and real-world usage have led people to consistently practice the language and use web services to consult with other programmers. Consistent discussions years after years have created an archive-like environment for Java resources, which new programmers can utilize to find help or simply improve.
- Certification courses: Java free online courses are extensively available on the web to prepare learners for the dynamic programming environment. Education platforms like upGrad help aspiring programmers learn Java online free to strengthen their skillset. To learn Java online free of cost, you just have to visit the right place and find a reliable course structure to help upgrade your Java knowledge. You need to have the willingness to grasp the concepts and have a go-getter attitude to learn the free java course. The certification courses give you the advantage of boosting confidence. Along with that it also sends the potential employer a signal that you are a person who seeks to constantly improve which would show in the quality of work you would produce.
- Job opportunities: As online classes and educational platforms help you learn Java free of charge, they also extend job opportunities to utilize the knowledge at the right place. After learning Java free of cost, programmers can apply for jobs online, making it a convenient process compared to physical efforts. The professionals who learn java online for free are the ones who are seeking opportunities to grow, now that opportunity could be within the organisation or outside. The professionals who have a better in-depth understanding of the concepts get opportunities at leadership positions, with high salary, there are other external factors as well which contributes to its growth. The online learning opportunities give the job seekers a chance to manage their work and study time, so the professionals should invest their time to learn free java courses.
Learn Java Online Free: The upGrad advantage
With the pandemic still raging, the best course of action is to learn Java online. There are plenty of self-paced introductory Java courses and professional certificate Java courses that aim to teach candidates basic and advanced Java programming skills and groom them for the job world.
After completing a Java certification program, you can bag promising job roles like Java Developer, Java Engineer, Java Analyst, Android Developer, Big Data Engineer, etc.
If you’re looking for a free Java course, you can check out our Java Courses on upgGrad Free Courses.
upGrad Free Courses is upGrad’s free learning ecosystem designed exclusively to help aspirants develop relevant and trending industry skills to stay ahead of the competitive curve. As a part of this initiative, you can choose the free Java course and enjoy perks like top-notch content and learning resources and a certificate of completion – all free of cost!
upGrad’s Priceless Learning initiative will not only help you fast track your career growth, but it will also help you upskill within six weeks.
Our learners also read: Learn java free!
Below is the list of courses available in Java:
- Core Java Basics
Let now look at the course content:
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2. Core Java Basics
In this course you’ll be learning in depth about Variables, Data Types, loops, conditionals and functions and develop skills to solve problems using these.
In this course, you will get to learn the basics of variables and data types, command line, integrated development environment, casting, arrays, strings and characters, errors and debugging, conditionals, loops, functions, etc. In this course as well you will get practice questions to get your hands on, where you could test the knowledge of your understanding.
When you choose to upskill with upGrad, you will enjoy a multitude of benefits. As always, upGrad free courses are taught by best-in-class instructors and industry leaders. Furthermore, you will also engage in interactive sessions with mentors and instructors. So, if you wish to acquire Java skills, all you need to devote is six weeks with upGrad, and by the end of the course, you will be ready for the job market! Learn Java free and start your journey today.
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How to Start
To join our Java courses for free, follow these simple steps:
- Head to upGrad Free Courses page
- Choose the course you want to join
All the courses present on our upGrad Free Courses page are available for free and don’t require any monetary investment. These courses help you kickstart your learning journey and get acquainted with the fundamentals of such complicated subjects.
If you have any questions or suggestions, please let us know through the comments. We’d love to hear from you.
If you’re interested to learn more about Java, full-stack development, check out upGrad & IIIT-B’s Executive PG Program in Full-stack Software Development which is designed for working professionals and offers 500+ hours of rigorous training, 9+ projects, and assignments, IIIT-B Alumni status, practical hands-on capstone projects & job assistance with top firms.
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Read our Popular Articles related to Software Development
How is Java code executed?
The execution of Java code is a two-step process. Initially, the compilation is done by a compiler independent of the operating system. This is passed on to the Java Virtual Machine(JVM) for execution. The compilation phase involves the generation of 'bytecode' which is a .class file that can be run anywhere on any system making it platform-independent. The bytecode is generated after parsing, syntax analysis, attribute checking and organizing the control flow of the program. This code is passed onto the JVM. JVM loads the class, verifies the generated bytecode and then uses a Just-In-Time compiler.
What are some of the famous Java frameworks?
Java is used to develop web, mobile, cloud, distributed applications, and many more. Because of its wide usage, many frameworks were developed to help in the faster and seamless development of software. Spring is a lightweight Java MVC framework that focuses on the layered implementation of applications. Hibernate is a framework that works on Object Relational Mapping wherein the objects are mapped to a relational database system. Vaadin is a Java framework that helps in the development of customized components and ensures a better user experience. Google Web Toolkit (GWT) provides an environment to write client-side Java code. Along with these, there are many more Java frameworks that one can explore.
What is meant by JVM?
JVM stands for Java Virtual Machine. It is a run time environment in which Java bytecode is executed. The existence of JVM makes Java platform independent. JVM loads the code, verifies it, executes it and provides a runtime environment. The memory is divided into stack and heap memory. It also has a garbage collector that deletes the objects that are not in use and frees up memory. A classloader loads .jar files that contain the .class files that have to be executed. The execution engine of JVM consists of a Just-In-Time compiler that reduces the size of code by grouping it.
Which is best Java or Python?
Python and Java are used to solve problems and both of these have their own way of doing that. While Java is faster than Python. Whereas, Python is easier to read language and easier to understand as well because of its simple syntax. It becomes a matter of preference basis the task at hand.
Is it worth doing Java certification?
Yes definitely, it is more than worth doing Java certification. First of all, Java is a demanded language where it is used in almost every field. Secondly having the certifications opens the doors to many good opportunities such as good jobs, promotions, salaries, etc.
Can you get a job with a Java certification?
Yes definitely, you can get a job with Java certification. Wherein, it sends a message to the employers stating that you have a relevant skillset to suit the job requirements of the company better and sends a positive message to the employers that you’re a person who seeks to learn constantly.
Is Python harder than Java?
Both Python and Java are important languages. Python has a much more readable syntax and is easier to learn. Java has a long line of code than Python. The productivity is high in Python with lesser lines of coding required in Java. The connectivity of Java networks is more and is widely used to connect. Java is more popular for mobile and web applications. There is no objective answer to this question because basis the preference and usability, the approach toward these two differ.
Why is Java better than Python?
Java is a faster language than Python. Java has OOPs and is easily portable and transferable. It provides security and has wider applicability. Java is compiled and has a bigger community and libraries.