Exploring the object oriented programming concepts using JAVA as programming language makes experience delightful. JAVA offers numerous features to model real world entities to their closest forms. The book explore syntax of JAVA with understanding of all OOP concepts. The book explains object oriented programming concepts and implementation using JAVA language. All beginner level learners will experience hands on session through use of included material in the book.
Table of Contents
Java Installation
Command Line Arguments in Java
Simple Java Programs
Operators in Java
Accepting Data through Keyboard and Displaying
Concept of Arrays
Objects and Classes in Java
Concept of Strings
Constructors in Java
Interface in Java
Utility Package in Java
Inheritance using Java
Exception Handling using Java
Multithreading using Java
Graphics using Applet
Book Objective and Key Topics
The primary objective of this book is to provide a practical, hands-on introduction to Object-Oriented Programming (OOP) concepts using the Java programming language. It is designed to guide students and beginners through essential programming tasks, ranging from basic environment setup to more complex topics like multithreading and GUI development, using clear explanations and representative code examples.
- Foundational Java setup and basic program execution.
- Implementation of core OOP principles like inheritance, classes, and interfaces.
- Practical handling of arrays, strings, and operators.
- Exception handling and multithreading basics.
- Graphics development using Java applets.
Excerpt from the Book
3. Writing a Java hello world program
Open a simple text editor program such as Notepad and type the following content: 1 public class HelloWorld { 2 public static void main(String[] args) { 3 System.out.println("Hello world!"); 4 } 5 } Save the file as HelloWorld.java (note that the extension is .java) under a directory, let’s say, C:\Java.
Don’t worry if you don’t understand everything in this simple Java code. The following picture explains it nicely: Figure 1. Syntax of Java main function [1] public class HelloWorld In above class definition • public means accessible from outside • class is keyword to create a ‘type’ • HelloWorld is class name
Every Java program starts from the main() method. This program simply prints “Hello world” to screen.
Summary of Chapters
Java Installation: Covers the step-by-step process of downloading and installing the JDK, as well as configuring necessary environment variables.
Command Line Arguments in Java: Explains how applications can accept input parameters via the command line and process them through the main method.
Simple Java Programs: Introduces basic primitive data types and provides exercises for writing elementary Java applications.
Operators in Java: Details the various types of operators including arithmetic, relational, logical, and bitwise operators.
Accepting Data through Keyboard and Displaying: Discusses different methods for user input, including DataInputStream, Scanner, and BufferedReader.
Concept of Arrays: Explains the definition and manipulation of one-dimensional and multi-dimensional arrays as objects.
Objects and Classes in Java: Covers the fundamental concepts of classes as type definitions and objects as instances, including data members and methods.
Concept of Strings: Describes the String class, its immutability, and various operations that can be performed on character sequences.
Constructors in Java: Explains the purpose of constructors in initializing objects and the difference between default and parameterized constructors.
Interface in Java: Discusses interfaces as a collection of method names and how they are implemented by classes to provide additional behavior.
Utility Package in Java: Covers the Random class for generating pseudorandom numbers and the Date class for handling time-related operations.
Inheritance using Java: Explains the principles of class hierarchies and the extends keyword for subclassing.
Exception Handling using Java: Details the structure of exception handling using try, catch, throw, throws, and finally blocks.
Multithreading using Java: Provides an overview of thread-based multitasking and the Thread class/Runnable interface.
Graphics using Applet: Introduces the creation of small applets that run inside a web browser and basic graphical output methods.
Key Terms
Java, JDK, JVM, Object-Oriented Programming, Class, Object, Inheritance, Exception Handling, Multithreading, Applet, Constructor, Interface, Array, String, Environment Variables
Frequently Asked Questions
What is the core focus of this publication?
The book focuses on providing a practical, experimental guide for students learning Object-Oriented Programming principles specifically through the Java language.
What are the central thematic areas covered?
The themes include environment setup, basic programming logic, class-based object orientation, exception handling, and user interface development via applets.
What is the primary goal of the author?
The goal is to demystify Java development by moving quickly from installation to writing functional, demonstrative code for common programming tasks.
Which scientific or pedagogical method is employed?
The book utilizes an experiment-based methodology, where each chapter follows the structure of presenting a concept, outlining an algorithm, and providing a working code solution.
What is covered in the main section?
The main section spans from basic syntax and operator theory to advanced topics like constructor overloading, interface implementation, and exception handling hierarchies.
Which keywords define this work?
Key terms include Java, Object-Oriented Programming, Class, Inheritance, Multithreading, and Applet.
How does the book handle JDK installation?
It provides specific instructions for Windows environments, including setting the PATH variable and the JAVA_HOME variable to ensure the compiler is accessible.
How are Java strings treated in this text?
The text explicitly distinguishes Java strings from C-style character arrays, emphasizing that strings in Java are objects and are immutable.
What is the author's approach to inheritance?
The author uses a class hierarchy example involving a staffing system (typist, teacher, officer) to illustrate how child classes inherit characteristics from a superclass using the 'extends' keyword.
- Arbeit zitieren
- Prof Sheetal Thakare (Autor:in), Dr M. A. Pund (Autor:in), 2021, JAVA. Experiencing Object Oriented Programming, München, GRIN Verlag, https://www.grin.com/document/1044961
