K. Somasundaram [Somasundaram - Introduction to Java Programming

K. SOMASUNDARAM

JAICO PUBLISHING HOUSE Ahmedabad Bangalore Bhopal Bhubaneswar Chennai
Delhi Hyderabad Kolkata Lucknow Mumbai Published by Jaico Publishing House
A-2 Jash Chambers, 7-A Sir Phirozshah Mehta Road
Fort, Mumbai - 400 001
www.jaicobooks.com Dr. K. Somasundaram INTRODUCTION TO JAVA PROGRAMMING
ISBN 978-81-8495-443-2 First Jaico Impression: 2013 No part of this book may be reproduced or utilized in any form or by any means, electronic or mechanical including photocopying, recording or by any information storage and retrieval system, without permission in writing from the publishers. I thank all the students of MCA and MSc-IT courses (1995-2013) of Gandhigram Rural Institute,Gandhigram, for whom I learned Java language. I thank my wife S.

Gomathi, sons S. Praveen Kumar and S. Magesh who spared the time to preparethis manuscript which otherwise should have been family time. I thank Mrs. T. Vasantha for preparingthe manuscript and typesetting it in PageMaker.

I also thank Mr. V. Pechi who helped in preparing fewchapters of the manuscript. I thank Mr. Soumen Mukherjee of Jaico Publishing House for initiating andgiving valuable suggestions on the outline of this book, and also the entire editorial team at Jaico fortheir efforts in bringing out this book. K. K.

Somasundaram

This book is the outcome of the preparations I have made for a course on Java Programming to thestudents of MCA and MSc. programs at Gandhigram Rural Institute for the past 15 years. Though I havehad excellent exposure to other computer programming languages like FORTRAN, COBOL, BASIC,Pascal and C, for developing scientific and commercial software, it was an entirely different experienceto learn Java. When I started reading the Java Hand Book by Patrick Naughton in 1995, I was puzzledto find the structure and syntax of a Java program. In fact it was difficult to identify which is the startingpoint of a Java program. But in the course of reading the book and understanding the concepts, I foundthe awesome capabilities of Java language.

I hope any reader who reads an introductory book on Javamay also experience the same. This book is intended for a one semester (starter level) course on Java programming. It includesthe new features included in JDK1.7. One of the notable things that you will find in this book, if youcompare with other books, is the use of the recently introduced printf() method defined in Console classinstead of the classical statement System.out.println(). The book is organized in 16 chapters. Chapter 1 explains the Object Oriented Programming (OOP)concepts, Java technology and its features.

Java literals, data types and variables are explained inChapter 2. Chapter 3 gives the feel of a Java program. The operators available in Java language aregiven in Chapter 4. The flow control statements are given in Chapter 5 with illustrative programs.Chapter 6 deals with arrays and the Javas Arrays class. Chapter 7 introduces the class concepts anddetails how objects are created from the classes. The reader needs to spend some time to understandthoroughly the basic concepts introduced in this chapter.

Chapter 8 explains the inheritance used forreusing the existing codes and demonstrates it, through illustrative programs. In Chapter 9, the conceptof package used to arrange and manage classes is explained. Further, how the encapsulation is realizedusing the access specifiers, like private, protected and public, is given. The interfaces, using which manyprogrammers can implement the same method with different codes are given. Chapter 10 introduceswrapper classes through which one can create objects for basic types. Abnormal conditions occurringin a program, called exceptions, are explained in Chapter 11.

This chapter demonstrates how onecan develop error-free and robust Java programs. Handling a stream of input/output data is dealt inChapter 12. Handling text using Strings is given in Chapter 13. Methods defined in three string classes are explained in it. Chapter 14 explains how multithreaded programs are created. The applet, which is asecond kind of Java program for client side programming, is explained in Chapter 15.

Drawing regularshapes using methods defined in Graphics class are explained in Chapter 16. In each chapter, review questions are given that will help readers to self-test their learning. In manychapters, Try It Out programs are given that enables the reader to develop programs for real lifeproblems. The chapters are so arranged, that any beginner can move from one chapter to another verysmoothly. I have not included any topic that will surprise the reader at any point. Any beginner withoutany background on any programming language can use this book.

I am sure, that after reading thisbook, the reader will gain the confidence to develop programs using Java. This book will give a solidfoundation on Java that will make the reader jump to higher level topics on Java like Swing, JDBC,Servlets etc. Those who would like to make suggestions on the content and presentation, or have questions onJava concepts are most welcome to email me at: . All queries will beanswered. August 2013Dr. K.

Somasundaram

Next page