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Java Programming language Tutorial Guide For Beginners



Introduction

Java is one of the most popular and in-demand programming languages. A number of software applications are developed using Java due to its leveraging features. Though it is quite easy to learn Java, which is why this tutorial is written for those who want to learn the basics of Java programming.  It is basically a programming guide for beginners. It can help you to learn Java programming and covers following listed points related to Java programming language:

  • Introduction to Java
  • Prerequisites for learning java programming language tutorial
  • Why learn Java programming and What are its benefits?
  •  Types of Java Applications of java programming
  •  What are the types of Java platform/edition
  • How do I get real-time experience in Java?
  • Setting up Java Environment
  • Object Oriented or OOPS Concepts

Java has a huge number of classes and methods that are necessary for beginners to learn.  Here in this article, we have described only a few aspects of this language. Still, you may find many new advanced concepts in Java language. Through this object-oriented programming language, a number of real-world applications can be developed, which can help you get a better understanding.

In this java programming language tutorial Guide for beginners, you will learn about various things including Java programming basics such as What is Java platform?, JVM, how to install Java, OOPS concepts, variables, class, object, arrays, strings, command-line arguments, garbage collection, inheritance, polymorphism, interface, constructor, packages, etc. Moreover, you will also learn about advanced concepts such as switch-case, functions, multithreading, swing, files, API, Java Spring, etc., in this Java basics for beginners guide.

What Is Java?

Java is a high-level programming language that was originally developed by Sun Microsystem in the year 1995. It is a platform independent and object-oriented language. As the language is platform independent, it can run on any operating system including UNIX, Windows or Mac OS. Java language programs are based on the object-oriented concept that is described in this tutorial. There are three basic terminologies associated with Java that are JDK, JRE, and JVM.

Java Development Kit (JDK)

JDK is known as the Java Development Kit. New applications can be developed, executed and compiled with JDK and even the existing applications can also be modified through JDK. On the machine where developers want to develop the applications, JDK must be installed. It further involves JRE and other development, debugging and monitoring tools.

Java Runtime Environment (JRE)

JRE stands for Java RunTime, already developed applications can be executed by JRE. As the name suggests it only provides a runtime environment so new applications cannot be developed by JRE and existing applications cannot be modified as well through JRE.

Java Virtual Machine (JVM)

JVM means Java Virtual Machine. It drives the java code and bytecode can be run through JVM. By converting the code into machine learning language the code gets executed.

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Prerequisites for learning java programming language tutorial

This free java programming language tutorial guide for beginners is designed for beginners with little or no Java coding exposure. These Java notes for beginners will help you to learn Java online for free. Despite this, you can also enroll yourself by clicking on the link ENROLL HERE!

Why learn Java programming and What are its benefits?

Here are some reasons why you should learn Java programming language:

  • It is very easy to learn.
  • Increase in demand for Java developers
  • It has a good collection of open-source libraries.
  • Java is free programming language

Moreover, Here are Some benefits of Learning Java Programming Language:

  • It is an object-oriented programming language.
  • It is platform-independent.
  • You can effortlessly write, compile, and debug various programs as compared to other programming languages.

 java programming

What are the Types of Java Platform/Edition That a Beginner Will Get To Learn at JanBask Training?

There are 4 types of Java platforms or editions that a beginner will get to learn here:

1) Java SE (Java Standard Edition)

It is a Java programming platform that includes Java programming APIs like java.lang, java.io, java.net, java.util, java.sql, java.math and much more. Also, it includes various core topics such as OOPs, String, Regex, Exception, Inner classes, Multithreading, I/O Stream, Networking, AWT, Swing, Reflection, Collection, etc.

2) Java EE (Java Enterprise Edition)

Java EE is an enterprise platform that is usually used to develop web and enterprise applications. Generally, it is built on top of the Java SE platform and hence includes various topics such as Servlet, JSP, Web Services, EJB, JPA, any much more.

3) Java ME (Java Micro Edition)

It is a micro platform that is dedicated to mobile applications and is used to deploy the portable code for embedded and mobile devices efficiently.

4) JavaFX

Java FX is a software platform which is required to create and deliver desktop applications, as well as it is a rich web application that can help you run files across a wide variety of devices. JavaFX has support for desktop computers as well as web browsers on Linux, macOS, and Microsoft Windows.
It is usually used to develop rich internet applications and uses a lightweight user interface API.

Setting Up Java Environment for Beginners

To set up the Java environment, if you haven't installed Java on your machine, then you may have to download it from the website of Sun Microsystem and of Eclipse for better results. Prior to Eclipse installation, the Java environment must be set up and you should have it on your machine. You can also download Java as per your machine requirement.

Eclipse is not just an IDE but it is an entire development ecosystem that has four main components for Java application development such as:

  • Workspace
  • Project
  • Perspectives
  • Views

The below- mentioned image shows the Java perspective window of Eclipse.

Java perspective window of Eclipse

Eclipse perspective has the tools that are used to write a Java application. A new project must be started to write the new Java application.

Java Object Oriented Programming (OOPS) Concepts

Java is an object-oriented programming language that follows the concepts of OOPS as a structured programming language. OOPS follow certain principles that are implemented by Class, Object and other features of Java language such as Constructor, Abstraction, Encapsulation, Polymorphism, Inheritance, Interface and other. OOPS principles are listed below:
oops
java programming language tutorial: Class

The class is a blueprint or prototype and objects which are created from this prototype as it contains functions and variables through which objects' behavior is described. 

Following is an example of a Class declaration in Java:

Class Class_Name{ Member Variable Declaration Method Definitions }

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java programming language tutorial: Object

Object-oriented languages like Java, combine programs and data into objects that are defined as a self-contained entity. These objects have their own attributes and behavior with the following properties that are mentioned below:

  • Objects have well-defined boundaries
  • It can perform a finite set of operations
  • Objects have only the data information
  • Objects can have their own state that is associated with the value of its attributes

Objects are instances of the Class. Following is the example of objects in Java programming:

code

Class Class_Name{ Void turnOn{} Public static void main (String [] args){ Class_Name Obj1=new Class_Name(); Obj1.turnOn(); } }

In the above example an object of Class has been created by the name Obj1 and through it the functions have been called. Methods can be of two types:

  1. User Defined
  2. Pre Defined

When a user defines any method, then it is known as a user-defined method, while those functions that are already defined in Java are known as Predefined functions.

java programming language tutorial: Inheritance

When one class inherits the properties of another class, then it is known as inheritance. Like if we have two classes, one is parent class and the other one is derived class, which is the child class of the parent class, then the child class will inherit the properties of the parent class. Inheritance in properties increases the code reusability. Take the example where we have a super or base class named laptop and its subclasses or child classes like Apple, MacBook, Lenovo and others may extend Laptop Class to inherit its properties.

java programming language tutorial: Polymorphism

Polymorphism is made up of two words, one is poly means many and Morphos means shape. Java supports two types of Polymorphism one is runtime polymorphism and other is compile time polymorphism. 

Here we can take the example of a class named Shape, which may be further divided into shapes such as circle, rectangle, triangle and many others.

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java programming language tutorial: Abstraction

To hide the implementation or internal details and show the functionalities to the user we can use the abstraction of Java. It is achieved by using Abstract classes and interfaces that are defined by using Abstract keywords. 

Abstract Class has the following properties:

  1. An abstract class may or may not have abstract methods

  2. We cannot instantiate an abstract class

  3. A class has an abstract method must be declared as abstract

  4. Any subclass of an abstract class then it must implement all abstract methods of its superclass.

While an abstract method is a method that does not have any method implementation. Moreover, the abstract method can be used in a subclass by overriding its class.

java programming language tutorial: Encapsulation

Encapsulation means binding data and code together in a single unit. Classes are the best encapsulation examples in which various methods, variables, and data are closed in a capsule that is known as class. To wrap all data together is known as encapsulation; it provides a secure environment for data.

java programming language tutorial: Interfaces

Interfaces look like classes, but both are two different concepts of Java. Methods and variables can be declared in interfaces built by default, these methods are abstract by nature. 100

Here is what we cover in the java programming language tutorial Guide

 Java vs. C#

   What is A Java Constructor?

   Angular 5 vs. React JS vs. Vue

   What is Inheritance in Java?

   JavaScript vs. JQuery

   Declare String Array in Java

   Serialization of Java Objects

   Java Collections

   Java String Functions

   What is Reactjs?

   What is OOP?

   What Is Spring Framework?

Interview Questions and Answers

  Java Interview Question

   Hibernate Interview Questions

   Spring Interview Questions

   AngularJS Interview Questions

   J2EE Interview Questions

   Reactjs Interview Questions

   NodeJS Interview Questions

   JQuery interview Questions

   Core Java Interview Questions

   JavaScript Interview Questions

Other java programming language tutorial Topics

 

Start a Career as a Java Developer

   Future Scope of Java Developer

   Java Developer Role

   Java Developer Resume Template

   Java Learning Path

   Java Developer skills

Wrapping Up!

Java cannot be defined in a single article. There are lots of concepts that are associated with this object-oriented and platform-independent programming language that is required by a beginner to learn in java programming language tutorial.  Along with that, you can even find examples as well in order to implement the above-mentioned Java features. Take Java Training and Certification.

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Comments

  • S

    Sanaya

    Thank you for taking the time and sharing this information with us. It was indeed very helpful and insightful while being straight forward and to the point.

     Reply
  • S

    sanjay

    Thank you very much, Your shared a wonderful post, Thanks for sharing the information!

     Reply
  • K

    Kaden Brown

    One of the best tutorials i have found on Java Tutorial, must read posts for people looking to grow their career in Java.

     Reply
  • C

    Caden Thomas

    This tutorial really helped me in getting familiar with java, at least good for beginner level.

     Reply
  • R

    Riley Walker

    Does janbask provide java programming classes, if yes then please acknowledge once or how to reach their consultant to know about it.

     Reply
  • A

    Arlo Hill

    Earlier I didn't know what encapsulation was, even though I tried to understand it many times but the way explained in this blog is really nice, now I understand it well. Thanks for such an informative and easy to understand blog.

     Reply
  • M

    markyjones99

    I have a few more questions related to Java that I am trying to explore on google but not getting satisfactory answers, can anybody help me?

     Reply

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