Perbedaan kata kunci antara C# dan Java

April 27, 2017April 27, 2017 Edison Sutan Kayo

Berikut adalah perbedaan kata kunci yang digunakan di C# dan Java untuk tujuan atau maksud yang sama.

C# Keyword	Java Keyword	Notes	C# Example	Java Example
Base	super	Prefix operator that references the closest base class when used inside of a class’s method or property accessor. Used to call a super’s constructor or other method.	`public MyClass(string s) : base(s)` `{` `}` `public MyClass() : base()` `{` `}`	`Public MyClass(String s)` `{` `super(s);` `}` `public MyClass()` `{` `super();` `}`
Bool	boolean	Primitive type which can hold either true or false value but not both.	`bool b = true;`	`boolean b = true;`
Is	instanceof	Boolean binary operator that accepts an l-value of an expression and an r-value of the fully qualified name of a type. Returns true iff l-value is castable to r-value.	`MyClass myClass = new MyClass();` `if (myClass isMyClass)` `{` `//executed` `}`	`MyClass myClass = new MyClass();` `if (myClassinstanceof MyClass)` `{` `//executed` `}`
lock	synchronized	Defines a mutex-type statement that locks an expression (usually an object) at the beginning of the statement block, and releases it at the end. (In Java, it is also used as an instance or static method modifier, which signals to the compiler that the instance or shared class mutex should be locked at function entrance and released at function exit, respectively.)	`MyClass myClass = new MyClass();` `lock (myClass)` `{` `//myClass is` `//locked` `}` `//myClass is` `//unlocked`	`MyClass myClass = new MyClass();` `synchronized (myClass)` `{` `//myClass is` `//locked` `}` `//myClass is` `//unlocked`
namespace	package	Create scope to avoid name collisions, group like classes, and so on.	`namespaceMySpace` `{` `}`	`//package must be first keyword in class file` `package MySpace;` `public class MyClass` `{` `}`
readonly	const	Identifier modifier allowing only read access on an identifier variable after creation and initialization. An attempt to modify a variable afterwards will generate a compile-time error.	`//legal initialization` `readonly int constInt = 5;` `//illegal attempt to` `//side-effect variable` `constInt = 6;`	`//legal initialization` `const int constInt = 5;` `//illegal attempt to` `//side-effect variable` `constInt = 6;`
sealed	final	Used as a class modifier, meaning that the class cannot be subclassed. In Java, a method can also be declared final, which means that a subclass cannot override the behavior.	`//legal definition` `public sealedclass A` `{` `}` `//illegal attempt to` `//subclass - A is` `//sealed` `public class B: A` `{` `}`	`//legal definition` `public final class A` `{` `}` `//illegal attempt to` `//subclass - A is` `//sealed` `public class B extends A` `{` `}`
using	import	Both used for including other libraries into a project.	`using System;`	`import System;`
internal	private	Used as a class modifier to limit the class’s use inside the current library. If another library imports this library and then attempts to create an instance or use this class, a compile-time error will occur.	`namespace Hidden` `{` `internal class A` `{` `}` `}` `//another library` `using Hidden;` `//attempt to illegally` `//use a Hidden class` `A a = new A();`	`package Hidden;` `private class A` `{` `}` `//another library` `import Hidden;` `//attempt to illegally` `//use a Hidden class` `A a = new A();`
:	extends	Operator or modifier in a class definition that implies that this class is a subclass of a comma-delimited list of classes (and interfaces in C#) to the right. The meaning in C# is very similar to C++.	`//A is a subclass of` `//B` `public class A :B` `{` `}`	`//A is a subclass of` `//B` `public class Aextends B` `{` `}`
:	implements	Operator or modifier in a class definition that implies that this class implements a comma-delimited list of interfaces (and classes in C#) to the right. The meaning in C# is very similar to C++.	`//A implements I` `public class A :I` `{` `}`	`//A implements I` `public class Aimplements I` `{` `}`

Sumber : https://msdn.microsoft.com/en-us/library/ms836794.aspx#tchcjavakeywordcomparison