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Welcome to the Lecture

Series on

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Introduction to Programming

With Java

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Structure of Java programs

Input and output to screen with Java program

Statements

Conditional statements

Loop constructs

Arrays, character and string handling

Functions (if time permits)

Syllabus

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1. Java 2: The Complete Reference

Patrick Naughton, Herbert Schildt

2. Thinking in Java (http://www.mindview.net/Books/TIJ/)

Bruce Eckel

3. Richard G Baldwins Introductory Java ProgrammingTutorial on: http://www.dickbaldwin.com/tocint.htm

Books & References

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Structure of Java programs

Compiling and running the program

Printing messages to the screen

Contents for Todays Lecture

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Some Basics

Q. What is a program?

Ans.A sequence of instructions that a computer can interpret

and execute.

Q. Why Java and not Hindi / Marathi / English?

Ans.Since,so far, computer is not intelligent enough to

understand natural languages.

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class class-name{

public static void main(String args[]) {

statement1;

statement2;

}

}

Structure of Java Programs

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First.java

class First {

public static void main(String args[]) {

System.out.println(Hello World);

}

}

Example Program

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Compiling:is the process of translating source code written in

a particular programming language into computer-readable

machine code that can be executed.

$ javac First.java

This command will produce a file First.class, which is used

for running the program with the command java.

Running:is the process of executing program on a computer.

$ java First

Compiling & Running the Program

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1. System.out.println(Hello World); outputs the string

Hello World followed by a new line on the screen.

2. System.out.print(Hello World); - outputs the string Hello

World on the screen. This string is notfollowed by a new

line.

3. Some Escape Sequence

\nstands for new line character

\tstands for tab character

About Printing on the Screen

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Some common errors in the initial phase of learning

programming:

- Mismatch of parentheses

- Missing ; at the end of statement

- Case sensitivity

The best way to learn programming is writing a lot ofprograms on your own.

Some Tips About Programming

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1. Write a program which prints the following informationabout at least 5 persons:

NAME MAIL-ID EMPLOYEE-CODE PHONE

Eg. Umesh umesh@cse p03161 25764728

Salil salil@cse p03160 25764728

Each entry should be on a separate line.

2. Write a program that prints the following line on the screen

along with quotes.

Can we print \ with System.out.println() statement?

Some Assignments

mailto:umesh@csemailto:salil@csemailto:salil@csemailto:umesh@cse

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