Introduction to Java

What is Java?

Java is a high-level, class-based, object-oriented programming language designed to have as few implementation dependencies as possible. It is a widely-used programming language, especially for web and application development.

Key Features of Java

• Platform Independence
• Object-Oriented
• Robust and Secure
• Multithreaded
• High Performance

Java Architecture

Java architecture is based on the concept of the Java Virtual Machine (JVM), which allows Java to be platform-independent. The architecture can be divided into two parts:

1. Java Development Kit (JDK)
2. Java Runtime Environment (JRE)

Installation

To install Java, follow these steps:

1. Download the JDK from the official Oracle website.
2. Run the installer and follow the instructions.
3. Set the JAVA_HOME environment variable to the JDK installation path.
4. Add the JDK's bin directory to your system's PATH variable.

Hello World Example

Here is a simple Java program that prints "Hello, World!" to the console:

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

FAQ