A Java tutorial with explanations and examples is designed for use by professionals, job seekers, and beginners. Java is a platform and programming language that is totally independent of any particular operating system. It helps in the creation of a variety of apps, including gaming applications, desktop applications, online applications, and mobile applications.
The best part about Java is that it did away with the challenging concepts of the C and C++ programming languages. Consider the Pointers. Since pointers were too complicated for beginners and experienced programmers, they eliminated the idea of pointers.
Java may be used as an internet programming language as well as a stand-alone general-purpose 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?
Java was formerly known as Oak. James Gosling and his colleagues thought that consuming high-quality coffee would help their language advance when language was still being developed. Java, as we all know, is the name of an island that exports coffee all over the world. Thereafter they fixed the Java as the name of this language.
Java Buzzwords
Java programming is easy to learn, much like almost any other language. Even if you just understand a few main concepts, you can program it and use it. Let’s look at the buzzwords used in 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 is executed. Since 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. The JVM is at the center of the whole Java program execution process. It takes a .class file and converts each byte code instruction into a machine language instruction that the CPU can interpret.
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?
Java program are partially translated into Java bytecode during compilation, rather than being totally translated into machine language. These programs can run on any operating system and processor as they are platform independent. A Java program is only compiled once, but each time it is run, it is interpreted.
Java bytecode provides 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
When developing server-side applications, we frequently use Java, however when creating client scripts or applications, we typically use JavaScript.
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. |
You can use Java on cell phones, mobile phones, and personal digital assistants in addition to Desktop computers. The Java programming language also makes it simple to develop application software that connects to and communicates with a variety of electrical devices.
In conclusion, In Java Learning Tutorials, you have learned the basics about Java, Platform, Java Virtual Machine. And you also learned about the difference between Java and C++, Difference Between Java and JavaScript, in Java Learning Tutorials.
