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Java VS C#

Compare Java VS C# and see what are their differences

Java logo Java

A concurrent, class-based, object-oriented, language specifically designed to have as few implementation dependencies as possible

C# logo C#

Simple, general-purpose, object-oriented programming language for the .NET platform
  • Java Landing page
    Landing page //
    2018-09-30

We recommend LibHunt Java for discovery and comparisons of trending Java projects.

  • C# Landing page
    Landing page //
    2023-07-28

We recommend LibHunt C# for discovery and comparisons of trending C# projects.

Java features and specs

  • Platform Independence
    Java is known for its portability across multiple platforms via the Java Virtual Machine (JVM). This means you can write code once and run it anywhere.
  • Large Standard Library
    Java boasts a comprehensive standard library, which facilitates development by providing pre-built solutions for a wide array of programming tasks.
  • Robust and Secure
    Java emphasizes strong memory management and has built-in security features, making it a reliable choice for applications requiring high levels of security.
  • Community Support
    With a vast and active community, ample resources are available for learning and troubleshooting. Numerous libraries and frameworks are available due to its long-standing presence.
  • Performance
    Modern Java versions offer performance that is generally very good for many applications, particularly server-side applications where the Just-In-Time (JIT) compiler can significantly optimize runtime performance.

Possible disadvantages of Java

  • Verbosity
    Java's syntax can be verbose compared to newer languages, requiring more lines of code to accomplish the same tasks, which may reduce readability.
  • Memory Consumption
    Java applications can be memory-intensive due to their reliance on the JVM, which can be a downside for resource-constrained environments.
  • Performance Overhead
    Despite its generally good performance, Java's reliance on the JVM introduces some overhead compared to languages that compile to native machine code, such as C++.
  • No Low-Level Programming
    Java abstracts away from the hardware, making it less suitable for low-level programming tasks that require direct hardware manipulation, such as embedded systems programming.
  • Slow Startup Time
    Java applications can have slower startup times due to the overhead of JVM initialization, which can be a drawback for desktop applications or command-line tools that are frequently started and stopped.

C# features and specs

  • Modern Language Features
    C# offers modern language constructs like async/await, Lambda expressions, LINQ, and pattern matching, which make it easier to write clear and concise code.
  • Large Standard Library
    C# comes with a comprehensive and well-documented standard library, which provides robust functionality out of the box and allows for rapid application development.
  • Cross-Platform
    With the introduction of .NET Core (now .NET 5/6), C# is fully cross-platform, enabling development for Windows, macOS, and Linux.
  • Strong Community and Documentation
    C# benefits from a large, active community and excellent documentation, making it easier to find help, tutorials, and third-party libraries.
  • Integration with Microsoft Ecosystem
    C# integrates seamlessly with other Microsoft products and services, such as Azure, Visual Studio, and Office, which can be beneficial for enterprise applications.

Possible disadvantages of C#

  • Windows-Centric History
    C# has a history of being Windows-centric, which might result in some legacy issues or libraries that are not fully optimized for cross-platform use.
  • Memory Management
    While C# abstracts away most of the memory management tasks with its garbage collector, this can lead to less efficient memory use compared to languages where developers have more control.
  • Learning Curve
    C# has a steeper learning curve compared to some other languages, especially for those who are new to object-oriented programming.
  • Performance Overhead
    Being managed code, C# might incur a performance overhead at runtime due to Just-In-Time (JIT) compilation, making it less suitable for low-latency or real-time systems.
  • Dependency on Microsoft Ecosystem
    Heavy integration with Microsoft products and services can be a double-edged sword, leading to dependencies that might be difficult to manage if trying to move away from Microsoft's ecosystem.

Java videos

AP Computer Science in 10 Minutes (Java review)

More videos:

  • Review - Java AP CS Exam Review
  • Review - Top Five Basic Programming Concepts of Object-Oriented Java - Six Minute Refresher!

C# videos

C# Review - The Basics

More videos:

  • Review - Is C# hard to learn?
  • Review - Learn C# BASICS in 10 MINUTES!

Category Popularity

0-100% (relative to Java and C#)
Programming Language
71 71%
29% 29
OOP
74 74%
26% 26
Generic Programming Language
Application And Data
100 100%
0% 0

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Java and C#

Java Reviews

The 10 Best Programming Languages to Learn Today
If you want to build your career in IoT or big data, Java is arguably the best programming language to learn. Java is cross-platform compatible and offers portability and versatility to almost any type of device, making it ideal for IoT applications. The Apache Hadoop big data processing system is also written in Java.
Source: ict.gov.ge
Alternatives to Nmap: from simple to advanced network scanning
This tool can provide favorite IP address ranges, NetBIOS information and web server detection. More features can be added by installing Java plugins.

C# Reviews

Top 10 Rust Alternatives
C# is a modern computing language. It is also an object-centred language and offers users a safe and reliable platform. It belongs to the C languages and is quite similar to C, C ++, JavaScript, etc.
The 10 Best Programming Languages to Learn Today
If mobile app development or virtual reality is your thing, consider learning C#. Many mobile developers use C# to build cross-platform apps on the Xamarin platform. It's also a popular choice for building 3D and 2D video games using the Unity game engine.
Source: ict.gov.ge

Social recommendations and mentions

Based on our record, Java should be more popular than C#. It has been mentiond 7 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Java mentions (7)

  • Can someone help with port forwarding?
    You can use UPnP PortMapper. Source code/Download. All you need is Java and that's it. Hope this helps. Source: about 3 years ago
  • PolyGlot 3.5 Release
    I would definitely suggest installing Java for this one, and the error should have asked you to do so. I'll have to look into why that was not popping properly for you and address it in a bug fix. In the mean time, you can address the issue by going here to install Java: https://java.com/en/. Source: over 3 years ago
  • i need help pls
    Https://java.com/en/ Is this the java you're using to install optifine. When I first got optifine I thought java meant Minecraft and not java. Source: over 3 years ago
  • I keep getting this error when I try to install Worldpainter
    I had this problem before just go to https://java.com/en/ and download the java then you will have to install the actual java, then after its installed go to This PC then Windows then Program Files then Java then go to the file name file name that show I think when you downloaded it then go into bin and you will find a java.exe file then click it and World Painter will install and that's who I solved king problem... Source: over 3 years ago
  • What to do immediately with a brand new build?
    Java, Adobe Reader, Handbrake (great for converting and adjusting videos). Source: almost 4 years ago
View more

C# mentions (1)

What are some alternatives?

When comparing Java and C#, you can also consider the following products

Python - Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.

JavaScript - Lightweight, interpreted, object-oriented language with first-class functions

Rust - A safe, concurrent, practical language

PHP - A popular general-purpose scripting language that is especially suited to web development

C++ - Has imperative, object-oriented and generic programming features, while also providing the facilities for low level memory manipulation

Lua - Powerful, fast, lightweight, embeddable scripting language