Java’s Real-World Applications


Java is known as the “King of All Programming Languages.” This language has formed the backbone for billions of devices and applications since its inception. This language is consistently placed first in software developers’ rankings of the finest programming languages. From mobile phones to enterprise servers and computing platforms, Java is used in the vast majority of applications.


Java Programming Language Applications

1. Java Desktop GUI Applications

Java makes it simple to create desktop applications. These applications are built using APIs such as AWT, Swing, and JavaFX. The AWT (Abstract Windowing Toolkit) is a Java interface for creating window-based applications. It is “not entirely Java-based” because it makes use of window user interface elements such as a menu, a button, a list, and so on. Swing is an AWT-based GUI widget toolkit that includes complex components such as trees, tables, scroll panes, tabbed panels, and lists. Swing is “completely Java-based,” and it develops apps using Java’s Swing components. It responds to all mouse clicks, keystrokes, and other inputs. JavaFX is a graph-based approach to developing desktop applications in Java that is distinct from AWT and Swings. Acrobat Reader, ThinkFree, Media Player, Antiviruses, and other desktop GUI programs are examples.


2. Java Mobile Applications

A mobile application is a program designed to run on mobile devices such as phones and tablets. The bulk of phones and smart gadgets in today’s world run on Android, and Android development is impossible without Java. Java Micro Edition (Java ME or J2ME) is a popular cross-platform framework for developing programs that operate on a variety of mobile devices, including feature phones and smartphones. Java is also supported by AndroidStudio and Kotlin. You might be wondering why only for Android app development. The reason for this is that the Java compiler converts Java classes into bytecode, which is then executed by the Dalvik Virtual Machine (DVM), and Android-specific virtual machine (VM). Photo and video gallery apps, Simple Calendar, Netflix, Tinder, QRReader, Google Earth, Uber, and other mobile applications are examples.


3. Java Enterprise Applications

A large software system that runs in a corporate context to meet the demands of an organization rather than individual users is known as an enterprise application. Because of its comprehensive capabilities that fulfill the criteria for enterprise applications, Java has become the primary choice for its development. Most enterprise firms in today’s world rely on Java applications because it is the most secure, powerful, and scalable language available. “Approximately 97 percent of enterprise applications use Java for large-scale software development,” according to Oracle Corporation. Java EE (Java Enterprise Edition) is an API that gives developers the tools they need to build enterprise-scale, multi-tiered, scalable, dependable, distributed, and secure network applications. Because Java operates inside the JVM (Java Virtual Machine), which verifies bytecode arriving from other systems and prevents security breaches, it meets the most important necessity of these businesses: security. This is why the majority of financial applications are built on the Java platform. Furthermore, Java helps the efficiency of these programs by including powerful memory management, which deletes unused memory automatically.

Java applications are easily scalable, allowing the number of users on the enterprise application site to grow. Java is used by businesses such as Naukri, Jabong, Google, Myntra, Flipkart, Trivago, ibibo, TripAdvisor, Spotify, Uber, TCS, Infosys, HCL, Wipro, Pinterest, and eBay. Business corporations, schools, banks, ERP (Enterprise Resource Planning) and CRM (Customer Resource Management) systems, clubs, charities, governments, interest-based user groups, and so on are examples of enterprise apps.


4. Java’s Scientific Applications

A scientific application is one that uses mathematics to influence real-world operations. Because of its rich characteristics, Java aids in the development of scientific applications. For building scientific apps including scientific computations and mathematical processes, Java emerges as the best option. It provides these applications with a quick, secure, and highly portable environment, which is a basic necessity for these applications. It includes sophisticated mathematical calculations that must produce consistent results across platforms, which leads developers to use Java for scientific applications. One of the most popular scientific apps, MATLAB (Mathematical Laboratory), employs Java for both front-end (interactive user interface) and back-end development (a core part of the system). The scientific applications’ front-end and back-end are both written in Java. Java provides struts, JSP (Java Server Pages), and servlets for the front-end. Core Java can be utilized in servlets for the backend. Applications in research, science, medical science, space, aeronautics, and other fields are examples of scientific applications.


5. Java Web Applications

A web application is a client-server program that runs on the Internet and is accessed using a browser. Servlets, struts, JSP (Java Server Pages) and JSF (Java Server Faces), Spring, Hibernate, and web-servers such as Apache Tomcat, Apache HTTP web-server, Resin, Adobe JRun, and others facilitate the development of web-applications in Java. We may create any type of web-based application with the help of these technologies. Servlets and JSPs are server-side components that aid in the development of the web application’s business logic. JSP is an extension of the servlet since it has more features than the servlet. With the support of open-source eCommerce systems like Broadleaf, e-commerce web apps also employ Java. Java’s simple coding and excellent security make it possible to create a wide range of applications in the fields of health, social security, education, and insurance., online forms, shopping carts, Gmail, Google Sheets, Google Slides, and many other web-based apps are examples.


6. Embedded Systems 

An embedded system, also known as an integrated system, is made up of a number of small computing units that work together to execute specific tasks for larger systems. Embedded systems can be found almost anywhere. Do you have any doubts? The majority of us utilize them without even realizing it. An embedded system is used in a motor system, automobile entertainment and multimedia, E-commerce, wireless communication, mobile computing, and networking, for example. Java is used to design embedded systems. Java was created with the intention of being used to create embedded systems. Java demonstrates how efficient its platform is, requiring only 130 KBs to use on smart cards or sensors. Java is fast, which is vital for working with low-power/low-speed computers, and it is resilient, which means it can safely tolerate exceptions. For nearly two decades, the JVM (Java Card) has been running on SIM (Subscriber Identity Module) cards in our phones. Other products that incorporate Java technology include Blu-ray Disc players, utility meters, and televisions. “100% of Blu-ray Disc Players and 125 million TV sets run Java,” according to Oracle Corporation.



We learn that Java is a “blue-collared” language that applies to all aspects of software development. It can be customized to meet specific company requirements. We see the value of Java in the real world as a result of these applications. When it comes to developing a secure and scalable application, Java is the way to go because it includes a lot of security features. This is why many banking applications that demand a high level of security are best designed in Java. So, if our business requirements meet its features, we can use this language. Although many technologies and programming languages evolve, Java’s popularity remains constant.