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Those who read our blog definitely know what a big interest we take in technologies’ comparisons. Flutter vs React Native vs Native, Python vs JavaScript, .Net Core (C#) vs Python, .Net Core vs Node.js, and many others more you can find in our tech blog. While some may think that we go for causing discussions and bringing supporters of the technologies in face-to-face arguments, the truth is that we do appreciate when our clients distinguish the options they’re making a choice among.

Either you’re an entrepreneur or a developer-newcomer, or considering switching between Java and .NET Core, we hope that the comparison this or another way will come in handy.

.NET vs Java: Some Similarities

To begin with, both technologies are widely used to create large-scale applications and software, and the answer to the question “Java vs .NET — which is better?” depends exclusively on the operational requirements of your business. Both technologies are object-oriented and offer enterprise-level development possibilities for almost every application type. Modular structure code guarantees flexibility, easier debugging, and the ability to reuse the code. They are perfect for working with complex architectures and high-load systems, and both of them are used by widely-known companies.

Java: Google, Netflix, Instagram, Spotify, LinkedIn, eBay, etc.

.NET: Microsoft, Intel, Dell, StackOverflow, and others.

Java vs .NET: Core Differences


Java is a programming language developed by James Gosling and released in 1995 by SunMicrosystems. The language is considered to have a shallow learning curve and a bunch of advantages and utilities. Whereas .NET developed by Microsoft is an open-source framework. 

Operating Systems

Java can be run on different operating systems because of the specific JVMs it uses (you write code only once and it can be used anywhere). What about .NET? Around six years ago .NET used to be fully controlled by Microsoft and ran exclusively on Windows. But since then Microsoft has radically changed its approach and now the latest version of the platform — .NET Core can be run anywhere too. The framework went through a transformation and now is compatible with other operating systems, it’s completely open-source, cross-platform, and requires no licensing costs. Both Java and .NET can use Linux and Windows as servers.

IDE & Tools

Integrated Development Environment is a software tool that includes other important tools for a developer to build and test applications. The default IDE for .NET applications is Visual Studio. The feature of creation at design time enhances fast development and helps in the customization of the apps’ appearance and behavior. However, for even faster development, engineers buy ReSharper or Rider. JetBrains Rider is acquiring more and more popularity among .NET developers. It’s a cross-platform solution that can operate with the same stability on multiple platforms (Windows, macOS, and Linux). Unlike in the case with Microsoft Visual Studio, there is no need to buy additional solutions for macOS and Linux if you decide to switch. Though the MacOS version includes less functionality compared to Windows. The Rider environment includes most of the features of the popular Visual Studio extension for .NET developers — ReSharper. Rider has an impressive set of refactoring, code validation, and context actions for all the languages and technologies it supports. Visual Studio also has sets of refactoring and code error checking, but much more limited than those provided in Rider and ReSharper.

Whereas for Java developers there are four main IDEs: Eclipse, IntelliJ Idea, Oracle JDeveloper, and Oracle NetBeans. The platforms are user-friendly and can be used even by beginners to write and test the code.

Language Support

With the help of JNI instruments, Java can integrate with other languages. Kotlin, which is completely compatible with Java, has been gaining a lot of popularity recently. It allows  developing projects in Java and Kotlin simultaneously. As a result, new functionality can be written in Kotlin without any losses in old Java projects. 

The .NET framework supports around 20 languages itself which makes the approach to business apps development more flexible. Some of the languages are C#, C++, F#,, etc.

Java vs .NET Performance Comparison

For years there wasn’t a big gap in performance between the applications built with these technologies. Though the optimization and investments that have been made by Microsoft, changed the game, making a huge difference between ASP.NET and Java — it has become blazingly fast.


Being an interpreted language, Java gets converted to machine language only after the code has been executed. With .NET, the code is compiled and also run on the system where the code will be initiated. That’s why C# operates better in a runtime environment.

Market Share

Currently, Java is one of the most popular technologies taking first place in various rankings. The availability of a big number of free training resources, a big community, and a relatively shallow learning curve, attracts more and more newbies every year. The number of vacancies on and shows that Java developers are in higher demand than .NET developers.

java vs net core

Summing up, let’s highlight some advantages and disadvantages of these programming languages.

Advantages of Java:

  • It’s object-oriented. Java allows developers to design modular programs and reusable code;
  • Java has an easy learning curve compared to other programming languages;
  • Platform independence enables one to move flawlessly from one computer system to another.

Disadvantages of Java:

  • It’s memory-consuming because of running on top of JVM;
  • Java is significantly slower compared to other languages as each code needs to be interpreted to the machine-level code.

Advantages of .NET Core:

  • Object-oriented programming eliminates the unnecessary code and includes many reusable components which significantly speed up the development;
  • The Microsoft family has Azurе  which significantly eases the organization of CI/CD;
  • Cross-platform implementation to develop applications on multiple OS.

Disadvantages of .NET Core:

  • Though .NET has become an open-source framework, the development requires a lot of expenses on Visual Studio IDE and other services;
  • It still lacks proper documentation and support.

Java vs .NET: Who wins?

The technologies possess fundamental differences as the approaches they use are completely different. It depends exclusively on the requirements you have and the needs of the end-users. Your business can take the advantage of the benefits of each. If you need further consultation to choose between these two technologies, drop us a line. At inVerita we have expert teams with skillsets for both that can develop the best solution to improve the efficiency of your business.

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