Java Tutorial is designed for beginners, professionals and job seekers for advance learning with explanation and examples. Java is a platform and programming language which is completely system independent language. It helps us to develop applications like mobile applications, web applications, desktop applications and game applications etc.
The best part of Java is, Java left the difficult concepts of C and C++ programming language. For example, Pointers. They completely eliminated the concept of pointers because it was very difficult for C & C++ learners and programmers.
Java can be used in two ways: as a stand-alone programming language for general-purpose programming and as an Internet programming language. Applications are general-purpose programming, while applets are programs designed specifically for the Internet.
Java is a compact and easy-to-learn programming language. It is built in such a manner that any coder may quickly learn it and create the most efficient applications possible without having any prior knowledge of computer programming.
In the Java Tutorial section we will learn the Java Buzzwords, what is platform, parts of java, Java Vs C++ and Java Vs JavaScript.
Table of Contents
Why the name Java?
Firstly Oak was the initial name of Java. James Gosling and his team were drinking a lot of coffee at the period of the language development then they felt that they were able to develop a better language with good quality of coffee. As we know, Java is the name of an island which exported coffee in the world place to place. Thereafter they fixed the Java as the name of this language.
Java Buzzwords
Java programming is as simple to learn as almost any other language. If you only know a few fundamental ideas, anyone can quickly create and use a program that suits their needs. Let’s look at the buzzwords of Java which are as follows.
- Distributed
- Dynamic
- High performance
- Multithreaded
- Object oriented
- Portable
- Robust
- Secure and Simple
What is Platform?
A platform is the software or hardware environment in which a program runs because Java is a software only platform that runs on top of other hardware-based platforms.
Types of Java Applications
There are following types of Java applications:
- Enterprise Application
- Web Application
- Mobile Application
Prerequisite of Java Learning Tutorial
The JavaSoft people maintained almost same syntax of C & C++ in Java so you can learn java If you have the basic knowledge of C/C++ programming language.
What is Java Virtual Machine (JVM)?
About all the Java Virtual Machine (JVM) is the most important part of the Java. JVM is the center of the entire Java program execution process because it takes the .class file and converts each byte code instruction into a machine language instruction which microprocessor executes.
First of all, we write the source code in text files with .java extension and then javac compiler compiles source files into .class files.
Java 8 popular interview questions and answers
What are the Parts of Java?
Sun Microsystems has split Java into three sections. In these three sections of Java, there are extra places to meet various demands.
- Enterprise Edition: It provides business solutions on a network.
- Standard Edition: It contains the basic core Java classes and we use this edition to develop applets and applications.
- Micro Edition : We use this edition to develop application for portable devices, such as phone.
Java Learning Tutorial for Geeks
How does a Java program work internally?
When we compile a java code, Instead of being completely translated into machine language, a Java program is converted into an intermediate language called Java bytecode. These programs are platform Independent, meaning they can operate on any operating system and processor. A Java program is only compiled once, but each time it is run, it is interpreted.
Java Bytecodes provide the ability to compile a Java program once and run it on any platform.
Difference between Java and C++ in Java Tutorial
Object-oriented programming languages include Java and C++. In many ways, the Java and C++ languages are fundamentally different.
| # | Java | C++ |
|---|---|---|
| 1 | Java generates byte code. | C++ compiles to machine language. |
| 2 | Java is a cross-platform programming language. | The operating system has an effect on C++. |
| 3 | Java code is portable, meaning it can run on any platform. | Code written in C++ is not portable. It has to be compiled separately for each platform. |
| 4 | There isn’t any backward compatibility with earlier languages. C/C++ has an influence on the syntax. | Except in a few exceptional cases, C source code is compatible. |
| 5 | Once written, run anytime and everywhere. | Once you’ve written anything, you have to compile it anywhere. |
| 6 | The object-oriented programming model is supported by Java. | Both procedural and object-oriented programming are supported in C++. |
| 7 | Multiple inheritance is not supported in Java. | Multiple inheritance is supported in C++. |
| 8 | The primitive and object types in Java are different. | Between primitive and object types, C++ is consistent. |
| 9 | Java does not support unions. | C++ supports unions. |
| 10 | Only method overloading is permitted in Java. Operator overloading is not permitted. | Methods and operators in C++ can be overloaded. This is referred to as static polymorphism. |
| 11 | System.in is used for input and System.out is used for output in Java. | In C++, input is handled by cin, while output is handled by cout. |
| 12 | Garbage collection and automatic object management. | C++ It allows you to handle objects manually by using the new and delete. |
| 13 | Java supports documentation comment (e.g, /**.. */) for source code. | It doesn’t support documentation comment for source code. |
| 14 | Classes contain all functions and data, and package scopes are provided. | External functions and data are allowed, and global and namespace scopes are accessible. |
Difference between Java and JavaScript in Java Tutorial
We use Java language extensively to develop server side applications, whereas we use JavaScript to develop client scripts or applications.
Following are the key differences between Java and JavaScript:
| # | Java | JavaScript |
|---|---|---|
| 1 | Java is an object-oriented programming language. | JavaScript is an object-based scripting language. |
| 2 | If you write a web application in Java, you may execute it in a browser or in a virtual machine. | Whereas you can run JavaScript code only on browser. |
| 3 | Java is strongly typed language. | But JavaScript is loosely typed language. |
| 4 | Java is a standalone language. | You can place JavaScript code within a web page or you can also integrate the code with HTML content. |
| 5 | Java supports multithreading. So multiple threads can work on one object. | JavaScript does not support multithreading. |
| 6 | You have to compile the code before using it. | JavaScript code is all-text. |
| 7 | Java supports constructor. | In the case of JavaScript, a constructor is a function and there are no rules for constructors in JavaScript like in Java. |
| 8 | Java has a file extension “.java”. | JavaScript has file extension “.js”. |
| 9 | There is a thread based approach to achieve concurrency in Java. | But JavaScript has event based approach to achieve concurrency. |
We can use Java not only in computers but also in cell phones, mobile phones and personal digital assistants. Also, we can easily create application software that connects and communicates with various types of electrical equipment by using java programming language.
In conclusion, In the Java Learning Tutorial, you have learned the basics about Java, platform, basic about Java Virtual Machine. And you have also learned about the difference between Java and JavaScript, difference between Java and C++ in Java Learning Tutorial.
