What is Java Used For? Your Guide to Learning Java in Bootcamps

To answer what is the purpose of  Java used for today, we need to go back to 1995, when the term “Java” first appeared:

Java is a class-based, object-oriented programming language designed to be concurrent and first released as a computing platform by Sun Microsystems. 

Today, it is considered one of the most popular programming languages worldwide and used as the server-side language for most back-end development projects, including those involving big data and Android development.

Java uses vary, but the most common implementation of this programming language is for desktop computing, along with other mobile computing devices, games, and numerical computing. Java is so widely popular today, with 90% of all Fortune 500 companies using it.

In this article, we will try to explain why using Java is great and reveal some programs made with Java as well as Java applications examples.

Let’s dive in!

What is Java Programming Language?

A critical difference between Java and traditional programming languages is that the code in Java programming language runs on any system that a Java Virtual Machine (JVM) can run on. (It’s commonly referred to as “write once, run anywhere” (WORA) in the programming world, highlighting Java’s cross-platform abilities.) Given that, it makes it less of a challenge for developers to write Java code and run it anywhere without worrying about things like the underlying computer architecture.

An interesting fact is that Java was actually developed to be quite similar to C++, sharing many syntaxes with it. Currently, Java is being maintained by Oracle and regularly receives updates so that java programmers have an up-to-date language they can work with.


What is Java programming used for today?

So, now that we’ve briefly established what Java is, it’s important to highlight what Java is used for today. 

First off, this programming language environment can be found on numerous large and small devices. It is the primary reason a Java developer has quite the flexibility when working with it.

Today, there are many applications for various platforms where Java language is used. From desktops, servers, cell phones, tablets, Blu-ray players, and televisions to web browsers, they all use Java. As a developer, you can write Java-based applications for any of these platforms. 

In addition, the same code can be run on all platforms that have Java Runtime Environment (JRE) without having to recompile the code (because Java is compliant with WORA requirements). 

It’s a significant plus for developers when writing and running Java, and that is why so many specialists prefer this programming language to others.

Regarding the uses of Java, it can also be implemented to develop applications that work in a distributed manner. It means that the same applications can be distributed between servers or clients in a network and can also be executed synchronously.

Moreover, Java uses include writing various application modules or applets as part of web pages. Today, Java serves for GUI applications, web- and applications servers, middleware applications, mobile apps, embedded systems, enterprise applications, big data, machine learning projects, and more.

Below we will try to reveal some of the most fundamental reasons why Java is so popular among developers, data science professionals, as well as industry giants:

Java is highly user-friendly and has an English-like syntax. It means that its learning curve is relatively simple compared to other programming languages, primarily if a foundational knowledge of C and C++ already exists. 

So, it’s regarded as the perfect language for coding beginners: They’re able to learn Java in two phases, beginning with Core Java and then progressing to Advanced Java.

Moreover, developers and programmers like using Java because of its high-level concurrency for designing applications, making it possible to create highly scalable solutions. Another benefit of Java is that it’s multi-platform compatible.

Additionally, another reason behind Java’s popularity in the IT world is its Application Programming Interface (API), which comprises numerous methods that developers can apply to any code. 

Java’s API also incorporates techniques that meet the needs of different purposes like networking, connecting to databases, parsing XML, handling input-output, etc.

Pros and cons of Java coding

With a substantial collection of available open-source libraries and functions, Java’s benefits are seemingly higher than its drawbacks as a programming language.

To start with, it’s simple and easy to learn because it shares syntax with C and C++. That said, the complex elements present in C++, like explicit pointers, operator overloading, storage classes, etc., make it even easier to learn Java language. 

So, if you have a background in these, it’ll work to your advantage when learning Java.

Plus, it’s an object-oriented programming language, meaning that every element in Java is treated as an object, with features like class, encapsulation, abstraction, inheritance, and polymorphism. 

So, multi-reading is supported by Java, which is great because it cuts down both the time and resources required to execute the program.

Moreover, Java is a platform-agnostic language. What does it mean?

It runs within its java virtual machine sandbox; both the platform and the computer architecture aren’t considered when writing Java applications. So, the same code can be used by other platforms without recompiling for each device.

Another great benefit of Java is its security because it runs within its runtime environments. That said, it’s important to note that Java browser plugins are highly insecure and are better off deactivated because most of the web now runs on JavaScript.

Despite its many advantages, Java does have some disadvantages as well.

The first one is that applications must be run on JRE, and while the Java sandbox does make the applications platform-agnostic, it also means that they can only be run on top of a Java virtual machine.

Moreover, UIs built on Java are a little less attractive. While various Java frameworks create UIs for applications, none of them are actually advanced enough to handle multiple complex UI elements, which are a reality with other programming languages like JavaScript.

Lastly, Java has no backup facility and instead works from storage.

Top 10 technologies based on Java

When Sun Microsystems first established Java, no one had imagined that the programming language would democratize computing and become the go-to platform for a range of software development ecosystems of languages, runtime platforms, SDKs, open-source projects, and a lot more.

After a few years of its development, Java refocused beyond its original design, intended for interactive TV and onto different applications for the World Wide Web. 

Today, Java provides a rich and wide range of API that helps programmers develop applications animating everything from smartcards to space vehicles.

Developers can use Java to craft a wide range of applications, like the following:

1. Android App Development:

Java is considered the official programming language when it comes to mobile app development. 

Most Android applications are built using Java, and the most popular Android app development studios like Android Studio IDE also use Java to develop for crafting their applications.

For developers eager to get into mobile app development, it’s a huge plus to be already familiar with Java since it’ll be much easier to develop Android applications with some Java knowledge. For example, one of the most popular Android applications, Spotify, is created using Java. Java app examples also include Twitter.

2. Web Applications:

Also, Java is used to develop web apps, given the programming language’s immense support for websites development through Servlet, JSP, and Struts.

That is why Java is commonly referred to as a server-side programming language, whereby these technologies can develop a variety of applications.

Some of the most popular frameworks and Java applications used for developing web-based apps include Spring, Hibernate, Spring Boot, and others. Additionally, some of the most popular websites like LinkedIn, AliExpress, Web. Archive and IRTC are written using Java as their coding language.

3. Internet of Things:

The Internet of Things (aka IoT) is another huge element that uses Java. IoT is basically any technology that connects devices in its network, communicates with them, and is found in almost all the small appliances we use, like health gears, smartphones, wearable technologies, innovative lighting technologies, televisions, and more.

Even though developing IoT applications is possible with other programming languages out there, the main advantage that Java provides to developers if compared to others is that the language is unparalleled and is secure, flexible, and versatile.

4. Big Data:

Similar to the Internet of Things, the development of Big Data applications is quite possible with other programming languages. However, Java is often the first choice of developers in this realm. 

For instance, the Hadoop HDFS platform tool used for processing and storing big data applications is written in Java.

Additionally, Java is commonly used in ETL applications like Apache Camel and Apache Kafka in Big Data. Here, Java is used to extract and transform data and incorporate it into the big data environments.

5. Desktop Applications:

Moreover, Java can be used to develop GUI applications, providing AWT, JavaFX, and Swing for this. Here, the tools come with pre-assembled components like list, menu, and button, so it’s easier to incorporate them too.

6. Game Development:

Another compelling reason why using Java as a programming language is game development. Java is widely prevalent among GameDev companies, given its support of the open-source 3D engine. 

This engine provides unparalleled capacity in designing 3D games, and some of the most popular games created are developed in Java, like Minecraft and Mission Impossible III. Some popular frameworks and libraries for game development include LibGDX and OpenGL.

7. Software Tools:

In addition, countless software tools used in development are written in Java, from IDEs like Eclipse, IntelliJ IDEA to Net beans.

8. Embedded Systems:

Embedded systems are basically low-level systems that form a part of the larger electromechanical systems and comprise tiny chips, processors, etc. 

They are also called integrated systems, and programmers can use Java to produce tools that can efficiently and quickly handle application exceptions.

Some examples of embedded systems applications that use Java include SIM cards using Java technology and Blu-ray disc players.

9. Web & App Servers:

Today, Java software is used among many applications and web servers, including Apache Tomcat, Project Jigsaw, Rimfaxe Web Server (RWS), Jo! etc., that dominate the space. 

On a commercial level, similar application servers like WebSphere, JBoss, WebLogic, etc., are also widely used in the industry.

10. J2ME Apps

J2ME means Java Micro Edition, and it’s a very popular framework for building mobile applications for handsets besides iOS. 

Programmers use Java here to compile it into bytecode for the Dalvik Virtual Machine (the one specific for Android applications). The application we all know as WhatsApp is also available in J2ME on Nokia.

person typing

Java frameworks in app development

In the coding world, frameworks refer to the large bodies of pre-written code to which developers can add their code to help solve a problem. 

Here, specialists can use a framework by calling its methods, inheritance, and supplying callbacks, listeners, and other implementations of the patterns.

Often, a framework will dictate the structure of an application, with some frameworks even supplying so much code to the extent that developers have very little left to do when writing an application. 

That said, this can either be a good or a bad thing, depending on the framework’s ease of use.

In the programming world, frameworks are considered as the substance of programming, whereby developers can build code on top of frameworks, with the end result being a fast and efficient program that’s easily pieced together. 

The contrary is also true if you build code on top of an insufficient framework, then the entire program is affected.

The top Java frameworks used today are Spring framework, Hibernate, Struts, Google Web Toolkit (GWT), JavaServer Faces (JSF), Grails, Vaadin, Dropwizard, and Play.

Where to learn Java programming

Learning Java programming is a great way to stay on top of the industry’s ever-changing structure because of its wide popularity and usability among developers. 

Today, most coding boot camps teach Java — but you must select a school that provides a curriculum on top of all the industry happenings. 

When deciding on where to learn the programming language, there are a few options, which we highlight below. You’ll find that various learning formats can help influence your choice, along with other programming courses that may be of interest to you.

BootcampLevelFormatCoursesEmployment rate
Code FellowsAllOnline, self-paced online, in-personSoftware Development, Ops and Cybersecurity93%
Zip Code WilmingtonAllIn-person, full-time, and part-timeJava, Data Engineering and AnalyticsN/A
DigitalCraftsAllFree intro online, paid full-time & part-time courses, online and hybridWeb Development, Cybersecurity, UX DesignN/A
CodingDojoAllOnline full-time, online part-timeSoftware Development, Data Science, Cybersecurity, UX/UI Design95%
Tech Talent SouthAllFull-time and part-timeJava, SpringBoot, Domain Modeling, HTTP and “RESTful” Design, HTML/CSS, JavaScript and AJAXN/A
CodingNomadsAllOnlinePython, Java, Data Science, APIs and Databases, SQL and Databases, Django web developments, Git and GitHub, Spring Framework, and more83%
Deep Dive CodingAllFull-time, part-timeData Science, Digital Media, Fullstack Web Development, Game Design, Java, Blockchain, Cybersecurity, and more86%

Code Fellows


With a 93% rate of in-field job placement upon graduation, students from Code Fellows have been successfully hired by 800+ companies over the years, including Facebook, Google, Nike, Xbox, Disney, Starbucks, Google, and more. 

The school features live remote instruction, where students can join from anywhere across the globe while enjoying real-time interaction with the school’s team of professional industry-leading instructors.

In Seattle, local students can also attend in-person classes that teach everything about Software Development, or Ops and Cybersecurity, depending on their interests.

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Zip Code Wilmington

Zip Code Wilmington

With a focus on professional development, students at Zip Code Wilmington will learn everything related to software development and data engineering within 12 weeks. 

It doesn’t seem too long but enough to cover the basics and understand if you want to grow your skills in the niche.

Upon graduating, students will have a solid background that will give them the knowledge to succeed at any company with the coding language they want. 

The school’s instructors are industry professionals, meaning that they have real-world experience to share with their students and help them succeed in the real world. 

The school itself operates in a 24/7 facility at The Mill in downtown Wilmington, Delaware, intending to create a safe, fun, and collaborative learning environment.

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Considered one of the best tech bootcamps in the U.S, DigitalCrafts is among the most positively reviewed technology boot camps in the country. 

With unique online and hybrid class formats, the school has enrolled 1000+ students since its first establishment in 2015. 

DigitalCrafts prides itself in employing instructors that have years of real-world experience in the coding world. With free intro classes and full-time and part-time learning formats, the school offers courses in Web Development, Cybersecurity, and UX Design.

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CodingDojo’s courses are structured in a way that ensures that their graduates thrive as STEM professionals when they pursue their careers. Having operated for approximately eight years, the school has successfully graduated 7,000+ specialists in the tech field.

Their curriculum includes a solid programming foundation, which is done through a three-stack approach. 

(At the same time, many other bootcamps specialize in one stack to better maximize class size and limit the learning difficulty.) With CodingDojo’s 3-stack curriculum, graduates are instead provided with a complete skill set, along with their ability to quickly learn new tech and programming languages required throughout their careers.

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CodingNomads offers best-in-class online coding bootcamps and programming courses to students of all nationalities.

Not only does this bootcamp provide a well-rounded curriculum in coding, but the school’s courses take students through the entire coding process from start to finish — all the way to an advanced professional level.

The school is small, family-run, but their passion is unprecedented in helping students from all coding backgrounds reach their goals. Their alumni have successfully landed jobs across a range of companies, like KPMG, Uber, Salesforce, BCG, Philips, Facebook, and more.

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Deep Dive Coding

Deep Dive Coding

Deep Dive Coding was established in 2013 and is a flagship program of CNM Ingenuity, a well-known nonprofit organization. 

Deep Dive immerses its students in tech training, entrepreneurial ecosystems, and continuous learning networks with multiple full-time and part-time training bootcamps that teach skills in various technologies.

Their immersive bootcamps are accessible, interconnected, industry-responsive, employer- and community-integrated learning opportunities to complete with wrap-around services.

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Frequently asked questions (FAQs)

What is Java?

Java is commonly referred to as the Java platform, a set of tools that allows for easy cross-platform application development. 

Additionally, we refer to it as a programming language, a general-purpose language used to develop programs. Java, the widely used and common programming language, has been around for more than 25 years and is among the top two programming languages used globally. 

The secret to its popularity is that it can be used across a wide range of applications, has consistent enhancements as a programming language, and is widely spread among developers. 

There is a Java Enterprise Edition (Java EE) platform where Java scripts and runs enterprise software, network tools, and web services through its API and runtime environment.

What is Java used for today?

Today, there are many applications for various platforms where Java is used. From desktops, servers, mobile phones, tablets, Blu-ray players, and televisions to web browsers — they all use Java; and developers can write Java-based applications for any of these platforms. 

In addition, because it complies with WORA requirements, Java can run on all platforms with Java`s Runtime Environment (JRE): This is a significant plus for developers when writing and running Java. That is why so many IT specialists prefer this programming language.

Java is highly user-friendly and has an English-like syntax, making it a perfect programming language for coding beginners. 

That’s because they’re able to learn Java in two phases, beginning with Core Java and then progressing to Advanced Java. Such a learning curve is relatively simple compared to other programming languages, especially if a foundational knowledge of C and C++ already exists. 

Moreover, developers and programmers like using Java because of its high-level concurrency for designing applications, making it possible to create highly scalable solutions. Another reason for Java’s popularity is that this language is multi-platform compatible.

What companies do use Java?

According to Stackshare, 9,973+ companies reportedly use Java, like Uber, Airbnb, Google, Pinterest, Netflix, Instagram, Spotify, Amazon, and many others. 

Reasons are many: the programming language’s substantial collection of available open-source libraries and functions; it’s the ease of use and simplicity when compared to other languages; the fact that it’s an object-oriented programming language; its JVM compatibility; the fact that it’s universal and cross-platform enterprise, and many more.

How do we use Java in real life?

After a few years of its development, there was a refocus for Java beyond its original design, which was intended for interactive TV, and onto different applications for the World Wide Web. 

Today, Java is the go-to platform for a range of software development ecosystems of languages, runtime platforms, SDKs, open-source projects, and a lot more. 

Java provides a rich and wide range of API that helps programmers develop Android applications, web applications, Internet of Things (IoT), big data, gaming development, desktop applications, software tools, embedded systems, web and app servers, etc.

Is it difficult to learn Java?

With Java, you don’t have to delve into the deep end of how things work in the programming language. 

Comparing Java to other programming languages, we’ll see that it’s relatively easy to learn. It’s not a relaxing walk in the park, of course, but it’s something you can quickly grasp if you put in the effort since it’s beginner-friendly. 

if you open any Java tutorial online, you’ll realize how object-oriented it is, making it both very readable and precise. In addition, because Java is well-structured and object-oriented, it can be mastered quite rapidly as many processes here run automatically.

What jobs can I do with Java?

After you’ve completed a coding bootcamp with a focus on Java, and after you’ve acquired the right tools under the belt, you can browse through a variety of job titles that incorporate Java. 

Junior Developer, Senior Developer, Java Architect, Java Web Developer, Java Android Developer, Java EE Developer are among them, both in-house and remote. Of course, the requirements for each of these jobs will vary, and your education, skills, and experience will all determine your success level. Whether you’re a newbie or a skilled professional in the field, with some experience in Java, it’s a good idea to gain more skills and knowledge using Java to maximize your potential and value to your future employer.

Is Java high-paying?

Developers work primarily with Java to design/build applications and websites with dynamic elements. While some work on applications and others on websites, most Java developers are present from conception to its successful completion. 

Java is actually on the list of the highest-paying technologies and is popular among big corporations, tech giants, investment banks, and insurance companies. Today, Java is used everywhere, from writing web applications to mobile applications for Android platforms and other applications, like those for GUIs. 

The average salary of a Java programmer in the U.S is around $120,000.

Is it worth learning Java in 2022?

Yes, it is. Java’s versatility and development options still make it one of the most popular programming languages today and, therefore, an excellent language to learn in 2022. It also depends on what you hope to achieve in the technology world. 

Getting well-versed in a specific language is nice when it works to benefit your own career goals. So perhaps it’s best to establish them and then make an informed decision about whether or not Java is worth your time and effort. 

That said, Python is another excellent programming language picking up success as a top choice along with Java.


As the world quickly gravitates towards everything mobile, particularly with the global pandemic hitting hard, convenience has become vital. coding languages like Java are becoming increasingly instrumental in the tech field to cater to these needs and the rise in mobile applications. 

Java program is among the most robust coding languages known and has been highly popular among recruiters over the past couple of years. The programming language has additionally held quite a steady position, with at least 60,000 Java jobs available in the U.S over the last few years.

While Python is a rising star in the coding languages, this hasn’t nearly affected Java’s popularity, allowing it to be still considered the workhorse of the programming world. 

In addition, it’s challenging for Java to lose its value over time, so the big chances are that we’ll still consider it as one of the top programming languages for years to come. If you plan to get into Java, regardless of your level of expertise, do your research on which coding bootcamps best match your interest.

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