Java Tutorial For Beginners: A Step-By-Step Guide

Introduction

Do you know that there are more than 10 million Java Developers all over the world? 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 online Java tutorial is written for those who want to learn the basics of Java programming.  Java has a huge number of classes and methods that are necessary for beginners to learn. Here in this blog, we have described only a few aspects of this language. Still, you may find many new advanced concepts in the 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. Get foundational to advanced Java skills with real-world project-solving experience with a credible Java online certification and training program. 

In this Java 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, objects, 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 basic tutorial for beginners guide. Get a clearer vision of programming through our industry-specific Programming Certification Courses at JanBask Training.

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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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Why is Learning Java Programming on the Rise?

Java forms the backbone of the internet. According to the data released by the United States Bureau of Labor Statistics, 35.35% of software developers use Java as their programming language. This is a high-level, object-oriented programming language that is widely used for the development of software applications in laptops, mobiles, data centers, etc. Thanks to its platform independence, it is one of the most sought-after programming languages in the I.T.domain.Start working on Java projects in real time and acquire hands-on experience before diving into the IT industry. Java is required in every sector of the industry. Check this infographic to know the companies using Java and their market share-

At compile time, it provides runtime verification and static type verification that makes it almost impossible to hack. Java is on the rise because of its multi-threaded capability. Top tech giants like Capgemini, Apple, Google, Mindtree, TCS, Oracle, HCL, and many more are searching for Java developers. 

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What are the Types of Java Platform/Edition for a Beginner?

A Java platform is a collection of programs that help programmers to run an application efficiently. It includes an execution engine, a compiler and a set of libraries in it. There are 4 types of Java platforms or editions that a beginner will get to learn here:

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 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’s 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.

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.

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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:

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

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

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.

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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.

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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

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Career Path of Java

Java is a leading mainstream programming language that is easy to learn and is mostly required in development and programming profiles. Get end-to-end learnings in widely adopted software development programming language JAVA via our all-in-one JAVA Training online. Learn about Core Java, OOPS Concept, Hibernate framework, Java 2EE and many more from our immersive training program. There are more than 10 million Java developers and in the recent past, there has been a 47% increase in demand for Java professionals. Anyone can make an easy entrance to this profile but they need to have proven skills & certification in hand to be in it. 

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.

FAQs

Q1. Why should I learn Java?

Ans- Java is easier to learn, develop and debug than other programming languages. Secondly, it is object-oriented which allows the users to create reusable programs and codes. Because of its durability, ease of use, cross-platform adaptability, and security features, Java has become the most preferred programming language in the global tech industry.

Q2. What is the objective of the online Java course?

Ans- The objective of our online Java training is:

• To provide you with a Java certification course online that gives experiences similar to offline classrooms and redeems you from the turmoil of traveling daily to the physical classes by incurring expenses, energy & time.
• To give you a complete Java discipline’s preparation by covering concepts, skills, and techniques that Java certifications & job role demands.
• To provide a unified and comprehensive Java training that imparts you basic to advanced concepts/skills of Java - that is examined for an individual in the Java online Certification examination - via immersive, exciting e-learning tools & industry experts-led Java classes online.

Q3. What will I learn in this course?

Ans- Here is all that you will learn:

• Core Java, Oops Concept, Data types, Variables
• Flow, Statement, Collections, Error Handling
• JDBC, Servlet, Servlet API
• Java Server Page (JSP), Javascript
• Spring, AJAX, Hibernate Framework
• Java 2EE
• Struts Framework, SOA, Web Services

Q4. What can I expect after this course?

Ans- After completing our Java certifications training online, you will achieve:

• Competing knowledge & skills can be applied during the certification exam of Java.
• Smart ways to enter & absorb the lucrative Java-led job markets.
• A Java Training Certification online, for training completion, by a highly recognized name - JanBask Training. Our Java training certification would declare the successful completion of your learning-filled best Java training online for beginners to professionals with us. Our past Java trainees have shared how they got great recognition by hiring companies with our training completion Java Certificate Online, during the hiring rounds.

Q5. Why are Java certifications necessary?

Ans- Java certification online is important to target after online training in Java as it:

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• Brings confidence while dealing with Java Developer/coding jobs or real industry projects.

Q6. What are the prerequisites for joining this course?

Ans- There are no prerequisites for joining our Java online course with certificates. And, it is not a mandatory requirement to have a technical background to take our online Java training course. It’s always good to have some technical background or basic knowledge of programming but it's not mandatory. Any learner to professionals, with or without any technical experience/background can learn Java with ease. Because we cover everything around Java from basics to advanced, you don't have any issues correlating with our online Java training course.

Q7. Do you help with resume building or interview preparation?

Ans- Yes, we do help with drafting and reviewing your resume and interview preparation for the Java developer jobs. We have trainers who are from the direct working industry and they know what type of resume/CV the recruiters hiring for Java roles expect from the upcoming professionals. We organize mock interviews, in which our trainers ask questions about the concepts you have covered in our best online Java course. These questions are careful to note & grasp as they will be majorly asked during the actual interviews for Java jobs. 

Q8. What learning benefits will I get from JanBask Training’s online Java course?

Ans- Our online training Java is not just about providing you with theoretical or practical knowledge for just qualifying for any competent certification exam, the purpose is to deliver you the knowledge that can be practically applied in real job roles. We serve you with the knowledge that's more around real-industry scenarios, case studies & practical assignments along with theoretical practice. We unveil you with real-time learnings that will make you ready with real-time use cases of Java.

Q9. What are the unique features of our programming courses?

Ans- At JanBask Training, we assure you,

• 10x higher interaction in live online classes conducted by industry experts
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Q10. Can I enroll in a single course?

Ans- Yes! To begin, click on the course you are interested in and register. You may register and complete the course to win a shareable certificate, or you can audit it to view the course materials for free. When you subscribe to a course as part of specialization, you are automatically registered for the entire specialization. Visit the learner dashboard to track your progress.