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 i