Parameters C# Java
Origin Developed by Microsoft Developed by Sun Microsystems (owned by Oracle)
First Release 2000 1995
Current Version C# 12.0 (2023) Java 22 (2024)
Syntax Similar to C and C++ Similar to C and C++
Memory Management Automatic Garbage Collection Automatic Garbage Collection
Platform .NET Framework Java Virtual Machine (JVM)
Compilation Compiled to IL, then IT compiled to machine code Compiled to bytecode, then JIT compiled to machine code
Cross-Platform .NET Core and .NET 5+ Support cross-platform development Write Once, Run Anywhere (WORA) with JVM
Library/Framework .NET Standard, .NET Core, .NET 5+ Java Standard Edition (SE), Java Enterprise Edition (EE), Spring
Integrated Development Environment (IDE) Visual Studio, Visual Studio Code Eclipse, IntelliJ IDEA, NetBeans
Supported Programming Paradigms Object-Oriented Functional Procedural Object-Oriented, Functional Procedural
Generics Supports Generics Support Generics
Lambdas and Functional Features Supported (Introduced in C# 3.0) Supported (Introduced in Java 8)
Main method Declaration ‘public static void Main(string[] args)’ ‘public static void Main(string[] args)’
Exception Handling Checked and Unchecked Exceptions Checked and Unchecked Exceptions
Concurrency Task Parallel Library (TPL), async/await java.uti.concurrent, ForJoinPool
Properties Supported with ‘get’ and ‘set’ accessors Not natively supported typically use getter and setter methods
Operator Overloading Supported Not Supported
Documentation Tool XML Documentation Comments Javadoc
Native Interoperability Platform Invocation Services (P/Invoke) Java Native Interface (JNI)
Licensing Open source under MIT License (for .NET Core and .NET 5+) Open source under GPL with the Classpath Exception (for OpenJDK)