java glossary

Arithmetic Operator

Arithmetic operators perform the same basic operations you would expect if you used them in mathematics (with the exception of the percentage sign).

What 'Concatenation' Is in Java Terms

Concatenation describes the operation of joining two strings together.

Unary Operator

Unary operators return the result of an operation on only one operand.

Assignment Operator

The most commonly used operator is the assignment operator.

Equality Operator

In Java, there are two equality operators to determine whether one operand is equal to, or not equal to the other operand

Bitwise Operator

Bitwise operators perform operations on the bits of their operands.

Compound Assignment Operator

Compound assignment operators provide a shorter syntax to assign the results of the arithmetic and bitwise operators.

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Introduction

Note: Before you start this tutorial, you must have downloaded and installed the Java SE Development Kit.

It’s traditional to start learning a new programming language by writing a program called "Hello World". You can think of it as a very simple initiation into the ranks of Java programmers. All the program does is write the text "Hello World!" to your computer screen.

The basic steps we will follow for our Hello World program are:

1. Write the program in Java
2. Compile the source code
3. Run the program

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Introduction to Object-Oriented Programming

Java is designed around the principles of object-oriented programming. To truly master Java you must understand the theory behind objects. This article is an introduction to object-oriented programming outlining what objects are, their state and behaviors and how they combine to enforce data encapsulation.

What Is Object-Oriented Programming?

To put it simply, object-oriented programming focuses on data before anything else.

How data is modeled and manipulated through the use of objects is fundamental to any object-oriented program.

What Are Objects?

If you look around you, you will see objects everywhere. Perhaps right now you are drinking coffee. The coffee mug is an object, the coffee inside the mug is an object, even the coaster it's sitting on is one too.

Object-oriented programming realizes that if we're building an application it's likely that we will be trying to represent the real world. This can be done by using objects.

Let's look at an example. Imagine you want to build a Java application to keep track of all your books. The first thing to consider in object-oriented programming is the data the application will be dealing with. What will the data be about? Books.

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Why download Java?

Java technology allows you to work and play in a secure computing environment. Upgrading to the latest Java version improves the security of your system, as older versions do not include the latest security updates.

Java allows you to play online games, chat with people around the world, calculate your mortgage interest, and view images in 3D, just to name a few.

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Java software for your computer, or the Java Runtime Environment, is also referred to as the Java Runtime, Runtime Environment, Runtime, JRE, Java Virtual Machine, Virtual Machine, Java VM, JVM, VM, Java plug-in, Java plugin, Java add-on or Java download.

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java thory

Java – Theory

What is Java?
Java is a 3rd Generation Object Oriented programming Language, developed by James Gosling in the year 1995. It was initially codenamed as Green and hypothetically called Oak named after the Oak tree outside Gosling’s house.
It is case sensitive and has a unique two step translation process that includes both Compilation and Interpretation which makes Java Platform independent.

What is Procedure Oriented Programming Language?
Pop is a Procedural Oriented Programming Language. In this, the stress is laid on function rather than data. Data may be kept floating throughout the Programming. Hence by scanning the whole program from beginning to the end and we can rectify any error caused. E.g. of POP based language are GW-BASIC, C, etc…
Characteristics of POP
1) Emphasis is laid on functions (Logical steps).
2) Functions share global data.
3) Data values can keep floating from one function to another.
4) Uses top down approach of programming.

Drawbacks of POP
1) As Data values are global to all the functions, you may require making necessary changes in the functions due to change in the data values.
2) It is not suitable to solve complex problems in real situations.

What is Object Oriented Programming Language?
OOP is an Object Oriented Programming Language. It is a modular approach to programming in which equal stress is given to data as well as methods and it allows the data be applied within the stipulated program area. It also provides reusability features to develop productivity logic.

Features of OOP
1. It gives equal stress on data and function.
2. It makes the program simple by dividing it into a number of objects.
3. The objects can be used as a bridge to have data flow from one function to another.
4. Data can be easily modified without any change in the function.

Advantages of OOP
1) We can extend the use of existing class through inheritance.
2) Using the concept data hiding can generate secured program.
3) We can create different modules in our project through objects.
4) Multiple instances of an object can be generated to co-exist without any interference.
5) It is highly beneficial to solve complex problems.
6) It is easy to modified and maintain software complexity.

Examples of OOP based languages are Simula, C++, Java, Python, and Smalltalk etc…

Basic Principles of OOP
1) Encapsulation – Binding up of data members and member functions together into a single unit called (class) is called Encapsulation.
2) Data Abstraction – Act of representing only essential features without including its background details is called Data Abstraction.
3) Polymorphism – The ability of a method to behave in more than one form is called polymorphism. Function Overloading is a way to implement it, in which more than one function has the same name but different argument list.
4) Inheritance – The ability of a class to derive the properties from another class is called Inheritance. The class that inherits is called the Derived / Sub / Daughter class and the class from which it is derived is called Base / Super / Parent class. The keyword used to implement Inheritance is ‘extends’.
5) Object – It is an identifiable entity with some characteristics and behaviour.
6) Class – It is a blueprint that represents a set of objects which share common characteristics and behaviour.

Related Terms 

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Principles of java

Principles

There were five primary goals in the creation of the Java language:

1. It must be "simple, object-oriented, and familiar".
2. It must be "robust and secure".
3. It must be "architecture-neutral and portable".
4. It must execute with "high performance".
5. It must be "interpreted, threaded, and dynamic".

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course content of java training in lalitpur: openeyesit

Coures: JAVA

Duration: 2 months

Time: 6days/week (1 hour per class)

Course Overview:

The Core Java technologies and application programming interfaces (APIs) are the foundation of the Java Platform, Standard Edition (Java SE). They are used in all classes of Java programming, from desktop applications to J2EE applications.

After completing this module you are ready to:

Develop Desktop applications, Networking & Multi-threaded programs in java.

Appear in SCJP exams

Update yourself with Advance frameworks of java.

Why Java at Openeyes IT Solution?

Industry Compliant Syllabus

Multi-Platform Demonstration

Product Based Training

Real-Time Case Studies

Use of Latest Tools & Technology

Workshops on New Technologies

SCJP Orientation Classes

Introduction

Programming language Types and Paradigms.

Computer Programming Hierarchy.

How Computer Architecture Affects a Language ?

Why Java ?

Flavors of Java.

Java Designing Goal.

Role of Java Programmer in Industry.

Features of Java Language.

JVM –The heart of Java

Java’s Magic Bytecode

Language Fundamentals

The Java Environment:

Installing Java.

Java Program Development

Java Source File Structure

Compilation

Executions.

Basic Language Elements:

Lexical Tokens, Identifiers

Keywords, Literals, Comments

Primitive Datatypes, Operators

Assignments.

Object Oriented Programming

Class Fundamentals.

Object & Object reference.

Object Life time & Garbage Collection.

Creating and Operating Objects.

Constructor & initialization code block.

Access Control, Modifiers, methods

Nested , Inner Class &Anonymous Classes

Abstract Class & Interfaces

Defining Methods, Argument Passing Mechanism

Method Overloading, Recursion.

Dealing with Static Members. Finalize() Method.

Native Method. Use of “this “ reference.

Use of Modifiers with Classes & Methods.

Design of Accessors and Mutator Methods

Cloning Objects, shallow and deep cloning

Generic Class Types

Extending Classes and Inheritance

Use and Benefits of Inheritance in OOP

Types of Inheritance in Java

Inheriting Data Members and Methods

Role of Constructors in inheritance

Overriding Super Class Methods.

Use of “super”.

Polymorphism in inheritance.

Type Compatibility and Conversion

Implementing interfaces.

java training in lalitpur: openeyesit

Package

Organizing Classes and Interfaces in Packages.

Package as Access Protection

Defining Package.

CLASSPATH Setting for Packages.

Making JAR Files for Library Packages

Import and Static Import

Naming Convention For Packages

Exception Handling:

The Idea behind Exception

Exceptions & Errors

Types of Exception

Control Flow In Exceptions

JVM reaction to Exceptions

Use of try, catch, finally, throw, throws in Exception Handling.

In-built and User Defined Exceptions

Checked and Un-Checked Exceptions

Array & String :

Defining an Array

Initializing & Accessing Array

Multi –Dimensional Array

Operation on String

Mutable & Immutable String

Using Collection Bases Loop for String

Tokenizing a String

Creating Strings using StringBuffer

Thread :

Understanding Threads

Needs of Multi-Threaded Programming.

Thread Life-Cycle

Thread Priorities

Synchronizing Threads

Inter Communication of Threads

Critical Factor in Thread -DeadLock

Applet

Applet & Application

Applet Architecture.

Parameters to Applet

Embedding Applets in Web page.

Applet Security Policies

A Collection of Useful Classes

Utility Methods for Arrays

Observable and Observer Objects

Date & Times

Using Scanner

Regular Expression

Input/Output Operation in Java(java.io Package)

Streams and the new I/O Capabilities

Understanding Streams

The Classes for Input and Output

The Standard Streams

Working with File Object

File I/O Basics

Reading and Writing to Files

Buffer and Buffer Management

Read/Write Operations with File Channel

Serializing Objects

GUI Programming

Designing Graphical User Interfaces in Java

Components and Containers

Basics of Components

Using Containers

Layout Managers

AWT Componets

Adding a Menu to Window

Extending GUI Features Using Swing Components

Java Utilities (java.util Package)

The Collection Framework :

Collections of Objects

Collection Types

Sets

Sequence

Map

Understanding Hashing

Use of ArrayList & Vector

Event Handling

Event-Driven Programming in Java

Event- Handling Process

Event-Handling Mechanism

The Delegation Model of Event Handling

Event Classes

Event Sources

Event Listeners

Adapter Classes as Helper Classes in Event Handling

Anonymous Inner classes a Short –cut to Event Handling

Avoiding Deadlocks in GUI Code

Event Types & Classes

Networking Programming

Networking Basics

Client-Server Architecture

Socket Overview

Networking Classes and Interfaces

Network Protocols

Developing Networking Applications in Java

Database Programming using JDBC

Introduction to JDBC

JDBC Drivers & Architecture

CURD operation Using JDBC

Connecting to non-conventional Databases.

Mail API

 Introduction to Email Technical Internals

Understanding of POP and SMTP framework

Complete understanding the email API

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