Delphi Programming Tutorial – Lesson 2: Types of Programs:
Learn which types of programs can be developed with programming languages like Delphi.
Delphi 7 was introduced in August 2002 and it became the standard Delphi version used by more Delphi developers than any other version of Delphi. It is one of the most successful integrated development environments (IDEs) created by Borland because of its stability, speed and low hardware requirements. It also remained in active use as of 2011.
Delphi 7 supported Windows XP themes, and also added more support for Web application development. It was also the last version of Delphi not requiring mandatory software activation.
Delphi supports rapid application development (RAD). Among features supporting RAD are application framework and visual window layout designer. It also has support for native cross-compilation.
Delphi uses the Pascal-based programming language named Object Pascal – also a language introduced by Borland, and it compiles Delphi source code into native x86 code.
It includes visual component library (VCL), support for component object model (COM) independent interfaces with reference counted class implementations, and support for many third-party components. Interface implementations can be delegated to properties of classes. Message handlers are implemented by tagging a method of a class with the integer constant of the message to handle.
Delphi also supports database connectivity, with various built-in database components. VCL includes many database-aware and database access components.
Delphi is a strongly typed high-level programming language, intended to be easy to use and originally based on the earlier Object Pascal language.
Pascal was originally developed as a teaching language, without low-level programming facilities or access to hardware and with no emphasis on efficiency; Turbo Pascal and its descendants, including Delphi, are designed for efficiency and support access to hardware and low level programming, with the facility to incorporate code written in assembly language and other languages.
Metaclasses are first class objects. Objects are actually references to the objects (just like in Java and many other modern programming languages).
Delphi includes an integrated IDE. The Delphi products all ship with a Visual Component Library (VCL), including most of its source code. Third-party components (sometimes with full source code) and tools to enhance the IDE or for other Delphi related development tasks are available, some free of charge.
The IDE includes a GUI for localization and translation of created programs that may be deployed to a translator; there are also third-party tools with more features for this purpose. The VCL framework maintains a high level of source compatibility between versions, which simplifies updating existing source code to a newer Delphi version.
The Delphi IDEs since Delphi 2005 increasingly support refactoring features such as method extraction and the possibility to create UML models from the source code or to modify the source through changes made in the model.
Delphi has large communities on Usenet and the web. When Delphi was owned by Codegear, many of its employees actively participated.
Each new release of Delphi attempts to be as compatible as possible with earlier versions, so that already-developed software and libraries can be retained. Incompatibility necessarily arises as new functionality is added, e.g., with support by Firemonkey of other platforms than Windows.
Enjoy the tutorial!
Best viewed in HD. To change your settings to HD:
1. Click on the Gear-icon (Settings) at the bottom of the YouTube Video Player.
2. Select “720p HD” and wait a few moments for the setting to take effect.
For more Delphi video tutorials also join us at https://www.learndelphi.net.
You may also want to visit the following resources for more information: