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Base Class (Java and Delphi Cross Reference Guide)

By Mike Prestwood

Java versus Delphi: A side by side comparison between Java and Delphi.

OOP Basics

Some languages support object-based concepts such as Paradox, Access, and VB Classic. Other languages have OO extensions and fully support object orientation in a hybrid fashion (such as C++ and Dephi for Win32). Finally, some lanages such as C#, VB.Net, Prism, and Java are entirely written in OO. Meaning, every line of code written must occur within a class).

Base Class

[Other Languages]

Languages Focus

When you create a class, it is either a base class or inherits from another class. Some languages require all classes to inherit from a common base class and some do not.

Java: Object

The Object class is Java's single base class all classes ultimately inherit from.

Syntax Example:

public class Cyborg {

or you can specify the base class (or any other class):

public class Cyborg extends Object {

Delphi: TObject

In Delphi programming language (Object Pascal), all classes ultimately inherit from the base class TObject.

Syntax Example:

//Specify both namespace and class:

TCyborg = class(System.TObject)
end;

//Use shortcut alias:

TCyborg = class(TObject)
end;

//None, default is System.TObject

TCyborg = class
end;

Delphi Base Class (TObject) 1 certification question.