Tutorial: Creating Objects

Write an Expression

            Expression- specific coding that when read by the computer it produces a value

Format for an expression

          Operator       Director/Package      Object Created/Name of Class

Ex)         New                 Chapter  1                      Terrarium( )

Operator- Denotes creating a new Object

New = A Keyword in Java telling the computer to create a new instance of a class definition

Final Expression

   new chapter1.Terrarium( )

   Creates Instance of the Terrarium Class

Basic Structure of Java Source Code

Package Declaration-  Packaging is a way of grouping classes in Java. This indicates what class the package belongs to and is the first line of the source code.

Package = Keyword in Java

Class Header- start of the class definition.

Ex) public class indentifier

Public = Access Control Modifier and keyword in Java

  Access control Modifier- controls what parts of the program can access that file.

Class Body- second part of the class definition

Ex)  {

           Properties Defined

            Capabilities Defined

       }

{ }- Denote the beginning and end of the Class Body

 Putting it all Together

Ex)    package identifier ;

public class indentifier {

           Properties defined

           Capabilities defined

}

What is going on in the Computer?

-Problem Domain- relevant to the problem                                             

-Initial Conceptual Model- model of the Problem Domain/ Solution to the problem

-Iteravitve Refinement Model

-Program Code (Executable Model)-final solution to the problem

-Compilation- translation so it can be read by the machine

-Machine Excecutable