J-Sharp
| J # | |
|---|---|
| Paradigms : | Object-oriented programming language |
| Publishing year: | 2002 |
| Developer: | Microsoft |
| Current version : | 2.0 (January 22, 2006) |
| Influenced by: | Java |
| Operating system : | Windows |
| MSDN.Microsoft.com | |
J # is an object-oriented programming language developed by Microsoft , which should make it easier for Java and Visual J ++ programmers to switch to or get started with the .NET environment . In the long term, Java developers should familiarize themselves with the framework in order to be able to use all functions of .NET later in C #. J # also served to make it easier for Java developers to take existing Java code with them into the environment in order to use it in new projects under a different .NET language such as C # or VB.NET .
Microsoft announced on January 10, 2007 that J # would no longer be developed and that there would be no new version in Visual Studio 2008 for it. Visual Studio 2005 was the last version that contained J #. Until 2015 there was limited product support that was limited to bug fixes.
Differences between J # and Java
Both languages have the same " basic syntax ", but still rely on different runtime environments . J # is used under the CLR (Common Language Runtime) , while Java uses the JRE (Java Runtime Environment) from Oracle or a similar environment.
In Visual Studio 2005 Microsoft provides a large number of namespaces and classes adopted from the Java world , which are intended to make it easier for a Java programmer to work with .NET. Particular emphasis was placed on converting the standard and swing classes. There is also a compiler which translates J # source texts into C # code .
Programming example
The following lines give a little insight into the structure and use of J #:
import System.Console;
import System.Windows.Forms.*;
public final class Program extends Object
{
public final static String HalloWeltAusdruck = "Hallo Welt!";
/**
* Einstiegspunkt
*/
public static void main(String[] args)
{
(new Program()).Run(args);
}
/**
* "Hallo, Welt!" Ausgabe an Standardausgabe (meistens Konsole)
*/
private void DefOutput()
{
System.Console.WriteLine("Ausgabe an Konsole...\n");
Console.get_Out().WriteLine(HalloWeltAusdruck);
System.Console.WriteLine("ENTER betätigen, um fortzufahren...\n");
Console.ReadLine();
}
/**
* Eine Art nicht-statischer Einstiegspunkt
*/
private void Run(System.String[] args)
{
// Ausgabe => Konsole
this.DefOutput();
// Ausgabe an Windows
WinOutput();
}
/**
* "Hallo, Welt!" Ausgabe als Windows-Fenster
*/
private void WinOutput()
{
System.Console.WriteLine("Ausgabe als Windows-Fenster...");
MessageBox.Show(Program.HalloWeltAusdruck, "Ausgabe als Windows MessageBox.");
System.Console.WriteLine("ENTER betätigen, um fortzufahren...\n");
Console.ReadLine();
}
}