Global Variables vs Local Variables in Java

When learning Java, one of the most important concepts to understand is how variables work. Among them, global variables and local variables play a key role in writing efficient and clean programs. In this blog, we’ll break down these concepts in a simple and beginner-friendly way. What Are Global Variables in Java? Global variables in Java are variables that are declared inside a class but outside any method. They can be accessed by all methods within that class. Types of Global Variables Non-Static Variables(Instance) – Belong to an object Static Variables – Shared across all objects Example class Demo { int x = 10; // Instance variable static int y = 20; // Static variable void display() { System.out.println(x); System.out.println(y); } public static void main(String[] args) { Demo obj = new Demo(); // create object obj.display(); // call method } } Output Step-by-step flow main() starts execution Object is created → Demo obj = new Demo(); display() method is called Prints: 10 20 Ke