Programming Concept

Chapter I

Introduction to Java Programming

By the end of this lecture you should be able to:explain how the module is structured;prepare adequately for lectures, tutorials and

practicals;explain how the module is assessed;explain the meaning of the word software;explain how Java programs are compiled and

run;use an integrated development environment

(IDE) to write, compile and run programs.

Unit Lectures : Ematchandirane Vasu

St-Patrick’s college, London

Email : ematchandirane.vasu@st-patricks.ac.uk

MODULE FORMAT

2.5 HOUR LECTURE

1 HOUR TUTORIAL

1.5 HOURS COMPUTER LAB

Preparing for your

lectures, tutorials and practicals

ASSESSMENT

Assignment (Coursework)-week 12

Portfolio 1-Week 4

Portfolio 2-Week 7

Portfolio 3-Week 10

public class Game{ Car f1; f1.spin();}

The set of instructions that tells a computer what to do is called a program

public class Game{ Car f1; f1.spin();}

Software is the name given to a single program or a set of programs.

Application software is the name given to useful programs that a user might need.

System software is the name given to special programs that help the computer to do its job.

public class Game{ Car f1; f1.spin();}

Programming is the task of writing instructions for the computer

public class Game{ Car f1; f1.spin();}

These instructions have to be written in a special programming language.

public class Game{ Car f1; f1.spin();}

Examples include: C++, Visual Basic, Pascal, Java. Examples include: C++, Visual Basic, Pascal, Java.

public class Game{ Car f1; f1.spin();}

Examples include: C++, Visual Basic, Pascal, Java.

Compiling Programs

COMPILERif (words > MAX){ System.out.print();}

program (source) code

00111110 11010010 11110010 01010110

machine code

Programmer

Program user

Java Programming

JAVA COMPILERif (words > MAX){System.out.print();}

program code

JVM

Java byte code

11110011000011010101011110000101

Java Programmer

00111110 11010010 11110010 01010110

10011001000111110101011111100000

01100011111110001010110010001001

Java Applications

A console application

A graphical application

A Java Applet running in a browser

A Java application running on a mobile phone

A Java application running on a smart phone

Your first program

public class Hello{ public static void main(String[ ] args) { System.out.println("Hello world"); }}

public class Hello{ public static void main(String[] args) { System.out.println("Hello world"); }}

Hello World

public class Hello{ public static void main(String[] args) { System.out.println("Hello world"); }}

Hello Worldpublic class Hello{

}

public static void main(String[ ] args) { }

System.out.println("Hello world");

Hello World

public class Hello{ public static void main(String[] args) { System.out.println("Hello world"); }}

Hello Worldpublic class Hello{

}

public Static void main(String[ ] args) {

System.out.println("Hello world");

public class Hello{ public static void main(String[] args) { System.out.println("Hello world"); }}

Hello Worldpublic class Hello{

}

public Static void main(String[ ] args) {

System.out.println("Hello world");

public class Hello{ public static void main(String[] args) { System.out.println("Hello world"); }}

Hello Worldpublic class Hello{

}

public Static void main(String[ ] args) {

System.out.println("Hello world");

public class Hello{ public static void main(String[] args) { System.out.println("Hello world"); }}

Hello Worldpublic class Hello{

}

public static void main(String[ ] args) {

System.out.println("Hello world");

public class Hello{ public static void main(String[] args) { System.out.println("Hello world"); }}

Hello Worldpublic class Hello{

}

public static void main(String[ ] args) {

System.out.println("Hello world");

public class Hello{ public static void main(String[] args) { System.out.println("Hello world"); }}

Hello Worldpublic class Hello{

}

public static void main(String[ ] args) { }

System.out.println("Hello world");

public class Hello{ public static void main(String[] args) { System.out.println("Hello world"); }}

Hello Worldpublic class Hello{

}

public static void main(String[ ] args) { }

System.out.println("Hello world");

Integrated development

environment (IDE)

Type your programs here

Use these icons to compile and run you program

Compiler errors reported here

Your files shown here

Compiling and Running Java from TextPad

46

TextPad Optional

Compiling and Running Java from JBuilder

47

JBuilder Optional

Compiling and Running Java from NetBeans

48

NetBeans Optional

A Programming Puzzle

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