Be Expert in Java: Learn Java programming and become expert

Table of Content

Java Programming

Application used in Java

Number of Java Applications

Number of Java platforms

Java Features

Program first java code

Compile time

Runtime

Establish Path in java

JDK vs JRE vs JVM

Java Virtual Machine (JVM) Architecture

Variables in Java

Java data types

What is Unicode System?

Java operators

Keywords used in JAVA

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Copyright 2023 by Ummed Singh

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Java Programming

Java serves as both a programming language and a platform. It is a sophisticated, secure, and object-oriented programming language. Sun Microsystems (now a subsidiary of Oracle) developed Java in 1995, and its conception is credited to James Gosling, often referred to as the father of Java. Originally named Oak, the language underwent a name change to Java when it was discovered that the name Oak was already claimed by another company. Regarding its platform designation, Java qualifies as such because it can operate within various hardware or software environments. This is due to its inclusion of a runtime environment (JRE) and API, which enables it to function as a self-sustained platform for running applications.

In Java, the main method serves as the entry point of the program and is executed when the program runs.

Here's a brief explanation of the code:

class Simple {

public static void main(String args[]) {

System.out.println(Hello Java);

}

}

class Simple: This line begins the definition of the class named Simple.

public static void main(String args[]): This line defines the main method, which is declared as public, meaning it can be accessed from outside the class. The keyword static