feat: Illustrate global static variable usage with shared companyName across all employee instances [global-variable-sharing]

📌 Core Concept:
Demonstrates how a static (global) variable is shared across all instances of a class, and how modifying it reflects across all objects.

🏢 Program Overview:
- `Company` class:
  - Instance Variables: `employeeName`, `salary` – unique for each object.
  - Static Variable: `companyName` – shared across all instances.
- Constructor initializes individual employee details.
- `display()` method prints employee + company data.

🧪 Behavior:
- Initially, all objects reflect `companyName = "Tech Corp"`.
- After updating `Company.companyName = "Global Tech"`, the change reflects for all employee objects instantly.

📌 Key Features:
- Shared class-level state with `static` keyword.
- Demonstrates difference between object-specific vs shared attributes.

✅ Useful pattern for:
- Application-wide constants
- Branding/labels
- Environment configuration across objects

Signed-off-by: Somesh diwan <[email protected]>

Author: Someshdiwan

Section10Methods/LocalandGlobalVariables/src/GlobalVariable.java

@@ -1,11 +1,3 @@
-/* A global variable is shared across all instances of a class.
-It is declared as static so that it belongs to the class instead of an object.
-
-Key Features:
-companyName is shared across all instances.
-Changing companyName for one object affects all objects.
-*/
-
 class Company {
     private String employeeName;  // Instance variable (belongs to object)
     private double salary;        // Instance variable
@@ -41,4 +33,12 @@ public static void main(String[] args) {
         emp1.display();
         emp2.display();
     }
-}
+}
+
+/* A global variable is shared across all instances of a class.
+It is declared as static so that it belongs to the class instead of an object.
+
+Key Features:
+companyName is shared across all instances.
+Changing companyName for one object affects all objects.
+*/