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Programming Languages The Twenty First Century This lesson introduces the programming languages of the 21st century: Internet (Web)based programming The 2000's: Java for the Internet...World Wide Web • Java technology is both a programming language and a platform for Internet ages. • With most programming languages, you either compile or interpret a program so that you can run it on your computer. • The Java programming language is unusual in that a program is both compiled and interpreted. • Compilation happens just once; interpretation occurs each time the program is executed. Java and Web • There three types of programs written in the Java programming language: applets, applications, servlets. • An applet is a program that adheres to certain conventions that allow it to run within a Javaenabled browser. • An application is a standalone program that runs directly on the Java platform. • Java Servlets are a popular choice for building interactive web applications on the server side. Java Platforms • Java platform has three editions: Java Micro Edition (J2METM technology), Java Standard Edition (J2SETM technology), and the Java Enterprise Edition (J2EETM technology). • The J2SE platform is a fast and secure foundation for building and deploying client-side applications. • J2EE simplifies enterprise applications by basing them on standardized, modular and re-usable components Enterprise JavaBeans. • J2ME specifically addresses the vast consumer space, which covers the range of extremely tiny commodities such as phones or a pager. C# and C++ • C# has the functionality of Java, Delphi and Visual Basic and it is a very strong language. • It is a strong language for network and internet programming. • It is the first component oriented programming language. • C# is more similar to C++ as a programming language. C# and C/C++ • C# is directly related to C and C++. • C and C++ shares several syntax, library and functionality. • In addition structures, unions, arrays, strings and pointers are most important and similar functionality for both languages. • C# inherits most of its operators, keywords, and statements directly from C++. C# and C/C++ (2) • C# supports multiple inheritance of interfaces, but not of classes. • Most of the C# basic types have the same names as C++ basic types but they are not really same. • There are a few difference between C# and C++, including the changes to new, structs, constructors, and destructors. .NET for C# • Microsoft® .NET is a set of Microsoft software technologies which enable an unprecedented level of software integration through the use of XML Web services. • Web services are small, discrete, building-block applications that connect to each other—as well as to other, larger applications—via the Internet. • .NET connected software uses a distributed computing model and builds on open standards like XML to connect PCs and other smart devices.