| Operator Overloading | C# supports operator overloading for multiple operators. | Java does not support operator overloading. |
|---|
| Runtime Environment | C# supports CLR(Common Language Runtime). | Java supports JVM(Java Virtual Machine). |
|---|
| API Control | C# APIs are controlled by an open-source community. | Java APIs are also controlled by open community processes support. |
|---|
| Public Classes | In C#, there can be many public classes inside a source code. | In Java there can be only one public class inside a source code otherwise there will be a compilation error. |
|---|
| Checked Exceptions | C# does not support Unix-based checked exceptions. In some cases checked exceptions are very useful for the smooth execution of the program. | Java supports both checked and unchecked exceptions. |
|---|
| Platform Dependency | C# is cross-platform and runs on both Windows & Unix-based systems. | Java is a robust and platform-independent language. The platform independence of Java is through JVM. |
|---|
| Pointers | In C# pointers can be used only in unsafe mode. | Java does not support anyway use of pointers. |
|---|
| Conditional Compilation | C# supports for conditional compilation. | Java does not support conditional compilation. |
|---|
| goto statement | C# supports the goto statement. | Java does not support support for goto statements. The use of the goto statement will cause errors in Java code. |
|---|
| Structure and Union | C# supports structures and unions. | Java doesn't support structures and unions. |
|---|
| Floating Point | C# does not support the strictfp keyword, which means the result of floating point numbers may not be guaranteed to be the same across all platforms. However, C# has a numeric type called decimal for high-precision calculations. | Java supports strictfp keyword which means its result for floating point numbers will be the same across various platforms. |
|---|
| Language | C# is a part C Family based upon C and C++. | Java is not considered a part of the C family, although it does have some similarities and influences from C and C++. |
|---|
| Routing | For routing configuration, it uses ASP.Net | For routing configuration, it uses akka.routing |
|---|
| Dependency Injection | It uses dependency injection. | It not only uses dependency injection but also allows modification. |
|---|
| Speed | Speed is slower than JAVA. But with the latest versions of .NET we can say it is now compatible with Java. | Speed is faster than the speed of C#. |
|---|
| Polymorphism | It supports polymorphism by default. | It supports polymorphism by default. |
|---|
| Delegates | It contains delegates. | It does not contain delegates. |
|---|