Java ve C# farkı nedir

Karşılaştırma başlıkları yazılım dünyasında kalıp halinde kullanıldıklarından İngilizce olarak yazılmıştır.

Diziler ve Kolleksiyonlar	Java	C#
Abstract data types	Var	Var
One-dimensional, zero-based index arrays	Var	Var
Multidimensional arrays, rectangular (single array)	Yok	Var
Multidimensional arrays, jagged (arrays of arrays)	Var	Var
Non-zero based arrays	Yok	Some
Unified arrays and collections	Yok	Var
Maps/dictionaries	Var	Var
Sorted dictionaries	Var	Var^[25]
Sets	Var	Var
Sorted sets	Var	Var^[26]
Lists/vectors	Var	Var
Queues/stacks	Var	Var
Priority queue	Var	Yok
Bags/multisets	Yok	Var
Concurrency optimized collections	Var	Var^[27]

Java

// Is valid, as numbers is an object of type short[]

short[] numbers = new short[100];

// Is valid, but it isn’t clear that values

// is an object of type double[]

double values[] = new double[100];

// Is valid, as numbers is an object of type short[]

short[] numbers = new short[100];

double values[] = new double[100]; // Won’t compile!

İfadeler ve Operatörler	Java	C#
Aritmetik Operatörler	Var	Var
Mantıksal Operatörler	Var	Var
Bitwise logic operators	Var	Var
Şart Operatörler	Var	Var
String Birleştirme	Var	Var
Casts(Atama)	Var	Var
Boxing	Var; implicit	Var; implicit
Unboxing	Var; implicit	Var; explicit
Lifted operators	Yok	Var
Overflow control	Yok	Var
Strict floating point evaluation	Var; opt-in/out	Yok
Verbatim (here-)strings	Yok	Var^[31]

Nesne Yönelimi	Java	C#
Classes	mandatory	mandatory
Interfaces	Var	Var
Abstract classes	Var	Var
Member accessibility levels	Var; public, package, protected, private	Var; public, internal, protected, private, protected internal
Class-level inner classes	Var;static inner classes are class level	Var; all inner classes are class level
Instance-level inner classes	Var	Yok
Statement-level (local) anonymous classes	Var	Var; Without methods
Partial classes	Yok; but see AspectJ^[36]	Var
Implicit (inferred) anonymous classes	Yok	Var^[37]
Deprecation/obsolescence	Var	Var
Overload versioning	Some	Var
Enums can implement interfaces	Var	Yok
Properties	Yok, but see JavaBeans spec	Var
Events	Provided by standard libraries	Built-in language feature
Operator overloading	Yok	Var
Indexers	Yok	Var
Implicit conversions	Yok	Var
Explicit conversions	Yok	Var

Fields and initialization	Java	C#
Fields	Var	Var
Constants	Var	Var; but no support for constant passed parameters^[41]
Static (class) constructors	Var	Var
Instance constructors	Var	Var
Finalizers/destructors	Var	Var
Instance initializers	Var	Yok; can be simulated with instance constructor
Object initialization	Bottom-up (fields and constructors)	Top-down (fields); bottom-up (constructors)
Object initializers	Yok	Var
Collection initializers	Yok; can be modelled	Var
Array initializers	Var	Var

Methot ve Özellikler	Java	C#
Static imports	Var	Var^[42]
Virtual methods	Virtual by default	Yokn-virtual by default
Abstract	Var	Var
Sealing	Var	Var
Explicit interface implementation	Default methods in Java 8	Var^[43]
Value (input) parameters	Var	Var
Reference (input/output) parameters	Yok	Var
Output (output) parameters	Yok	Var
Constant (immutable) parameters	Var;final parameters	Yok
Variadic methods	Var	Var
Optional arguments	Yok^[44]	Var
Named arguments	Yok	Var
Generator methods	Yok	Var
Extension / default methods	Var	Var
Conditional methods	Yok	Var
Partial methods	Yok	Var

Generics	Java	C#
Implementation	Type erasure	Reification
Runtime realization	Yok	Var
Covariance	Var	Var
Contravariance	Var	Var
Reference type constraint	Var; implicit	Var
Value/primitive type constraint	Yok	Var
Constructor constraint	Yok	Var
Relation constraint	Var	Var
Primitive/value type support	Yok	Var
Migration compatibility	Var	Yok

Metadata	Java	C#
Metadata annotations/attributes	Interface based; user-defined annotations can be created^[68]	Class based
Positional arguments	Yok; unless a single argument	Var
Named arguments	Var	Var
Default values	At definition	Through initialization
Nested types	Var	Var
Specialization	Yok	Var
Conditional metadata	Yok	Var

Preprocessing, Compilation and Packaging	Java	C#
Namespaces	Packages	Namespaces
File contents	Restricted	Free
Packaging	Package	Assembly
Classes/assembly search path	ClassPath	Both compile-time and runtime^[69][70]
Conditional compilation	Var	Var
Custom errors/warnings	Var; AnnotationProcessor	Var
Explicit regions	Yok	Var

Threading and Synchronization	Java	C#
Threads	Var	Var
Thread pool	Var	Var
Task-based parallelism	Partial^[71]	Var^[72]
Semaphores	Var	Var
Monitors	Var	Var
Thread-local variables	Var	Var; ThreadStaticAttribute

Native interoperability	Java	C#
Cross-language interoperability	Var (with Nashorn, CORBA, JNI orJNA)^[78]	Var; C# was designed for it^[78]
External/native methods	Var	Var
Marshalling	External glue code required	Var; metadata controlled
Pointers and arithmetics	Yok; but references exist	Var
Native types	Var^[79]	Var
Fixed-size buffers	Yok	Var
Explicit stack allocation	Yok	Var
Address-of	Yok	Var
Object pinning (fix variable to address)	Yok	Var