Week 3 fundamentals of programming

System

Is an organized set of related components established to accomplish certain task

System development life cycle(SDLC)

It is a structured process used by software developers and engineers to design, develop, test, and deploy software system in a systematic and efficient way

Preliminary Investigation, analysis, design, development, Implementation.

Phase of SDLC

Preliminary investigation

Determining the problem

Analysis

Understanding the existing system

Design

Planning the new system

Development

Doing the work to bring the new system into being

Implementation

Converting the new system

Computer program

Is a set of detailed, step-by-step instructions that directs the computer what you want it to do.

It is a notation for expressing instructions to be carried out by a computer.

The only language a machine knows. It consist 0’s and 1’s

Compiler

Is a special language that translates high level language instructions into machine language

Compiler

Catches all syntax error

Syntax and semantis

The two fundamental distinct concept

Syntax

Refers to the rules that define how program must be written.

Focuses on structure, symbols, keywords, punctuation, and the order of elements

Semantics

Refers to the meaning or logic

Focuses on the behavior of the program

Java

Is a full pledge and powerful language that can be used in many ways.

Java SE

Can be used to develop client side stand alone applications or applets.

Java EE

Can be used to develop server side applications, such as Java servlets and Java server Pages

Java ME

Can be used to develop applications for mobile devices, such as cellphones.

Java development kit(JDK)

Consist of a set of separate programs, each invoked from a command line, for developing and testing java programs

Integrated development environment

Used for rapidly developing Java programs. Editing, compiling, building, debugging, and online help are integrated in one graphical user interface

Comment

That documents what the program and how it is constructed.

Line comment

Two slashes (//) on a line?.

Block comment

Enclosed between /* and */ on one several lines

Semicolon;

Known as statemnet terminator