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Reflection is also a key strategy for metaprogramming. In some object-oriented programming languages such as C# and Java, reflection can be used to bypass member accessibility rules. For C#-properties this can be achieved by writing directly onto the (usually invisible) backing field of a non-public property.
C++ uses the three modifiers called public, protected, and private. [3] C# has the modifiers public, protected,internal, private, protected internal, private protected, and file. [4] Java has public, package, protected, and private; package is the default, used if no other access modifier keyword is specified. The meaning of these modifiers may ...
In .NET, they are called "custom attributes", in Java they are called "annotations". Despite the different name, they are conceptually the same thing. They can be defined on classes, member variables, methods, and method parameters and may be accessed using reflection. In Python, the term "marker interface" is common in Zope and Plone.
C# type Bar { get; set; } type Bar { get; private set; } type Bar { private get; set; } D — Java — Objective-C 2.0 (Cocoa) @property (readwrite) type bar; and then inside @implementation @synthesize bar; @property (readonly) type bar; and then inside @implementation @synthesize bar; — Swift var bar : type: let bar : type — Eiffel Python ...
Reflection is the API used to read CLI metadata. The reflection API provides a logical view of metadata rather than the literal view provided by tools like metainfo. Reflection in version 1.1 of the .NET framework can be used to inspect the descriptions of classes and their members, and invoke methods.
The C# type names are also merely aliases for Common Language Runtime (CLR) types. The C# System.Int64 type is exactly the same type as the long type; the only difference is that the former is the canonical .NET name, while the latter is a C# alias for it. Java does not offer methods directly on primitive types.
Like the Qt framework's pseudo-C++ signal and slot, C# has semantics specifically surrounding publish-subscribe style events, though C# uses delegates to do so. C# offers Java-like synchronized method calls, via the attribute [MethodImpl(MethodImplOptions.Synchronized)], and has support for mutually-exclusive locks via the keyword lock.
Currently, it is popular to use the term late binding in Java programming as a synonym for dynamic dispatch. Specifically, this refers to Java's single dispatch mechanism used with virtual methods. Finally, Java can use late binding using its reflection APIs and type introspection much in the same way it is done in COM and .NET programming ...