Understanding the Basics of Java Programming


Introduction to Java

Java is a high-level, object-oriented programming language that is known for its platform independence. This means
Java code can run on various platforms without modification. It's widely used for developing web applications,
mobile apps, and more.


Java Syntax

Java programs are composed of classes and methods. Here's 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!");
    }
}

In this code snippet:


  • public class HelloWorld: This defines a class named HelloWorld.
  • public static void main(String[] args): This is the main method where program execution begins.
  • System.out.println("Hello, World!");: This line prints "Hello, World!" to the console.

Variables and Data Types

Java supports various data types, including int, double, String, and more.
Here's an example of variable declaration and initialization:


int age = 25;
double price = 19.99;
String name = "John";

Control Structures

Java provides control structures such as if, for, and while to control the
flow of your program. Here's an example of an if statement:


int number = 42;
if (number > 50) {
    System.out.println("Number is greater than 50");
} else {
    System.out.println("Number is less than or equal to 50");
}

Conclusion

This guide covers the basics of Java programming, including syntax, variables, data types, and control structures.
As you progress, you'll explore more advanced topics and build powerful applications with Java.