Java Introduction

What is Java?

It is a computer programming language. Java allows programmers to write computer instructions using English commands instead of writing them in digital code. It is known as a high-level language because it can be easily read and written by humans.

Like English, Java has a set of rules that determine how instructions are written. These rules are known as their syntax. After a program is written, high-level instructions are translated into numerical digits, which the computer can understand and execute.

It is owned by Oracle, and more than 3 billion devices run Java.

It is used for:

• Mobile applications (specially Android apps)
• Desktop applications
• Web applications
• Web servers and application servers
• Games
• Database connection
• And much, much more!

Why Use Java?

• Java works on different platforms (Windows, Mac, Linux, Raspberry Pi, etc.)
• It is one of the most popular programming language in the world
• It has a large demand in the current job market
• It is easy to learn and simple to use
• It is open-source and free
• It is secure, fast and powerful
• It has a huge community support (tens of millions of developers)
• Java is an object oriented language which gives a clear structure to programs and allows code to be reused, lowering development costs
• As Java is close to C++ and C#, it makes it easy for programmers to switch to Java or vice versa

Java Example

Let's have a quick look at Java programming example.

E3Docs.java

class E3Docs {
    public static void main(String args[]) {
        System.out.println("Hello E3Docs");
    }
}