feat: Demonstrate static variables and static methods using Mobile1 class [static-method-variable-demo]

🔑 Key: static-method-variable-demo
🧠 Logic:
- `Mobile1.name` is a static variable → shared by all instances of the class.
- `brand` and `price` are instance variables → unique for each object.
- `show()` is a non-static method → accesses both instance and static variables.
- `show1()` is a static method → can only access static members directly but can use object reference to access instance members.

📌 Concepts Illustrated:
- 📌 **Static Variable**:
   • Declared as `static String name;`
   • Shared among all instances. Changes to `Mobile1.name` reflect in all objects.
   • Example: Changing `Mobile1.name = "SmartPhone";` affects both `obj1` and `obj2`.

- 📌 **Instance Variables**:
   • `brand` and `price` are specific to each object.

- 📌 **Static Method**:
   • Can’t access non-static variables directly (e.g., `brand`, `price`).
   • Accepts an object as parameter (`Mobile1 obj`) to access instance members.

🧪 Output:
- obj1: Apple : 1500 : SmartPhone
- obj2: Samsung : 1700 : SmartPhone
- show1(obj1): Apple : 1500 : SmartPhone

🧠 Note:
- If `name` were non-static, each object could have a different name.
- Static methods are typically used for utility or class-wide operations, not tied to object state.

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

Author: Someshdiwan

Section10Methods/LocalandGlobalVariables/src/StaicMethodDemo.java

@@ -9,16 +9,14 @@ public void show() {
         System.out.println(brand+" : "+price+" : "+name);
     }
 
-    public static void show1(Mobile1 obj)
-    {
+    public static void show1(Mobile1 obj) {
 //		System.out.println("in static method");
         System.out.println(obj.brand+" : "+ obj.price +" : "+obj.name);
     }
 }
 
 public class StaicMethodDemo {
-    public static void main(String[] args)
-    {
+    public static void main(String[] args) {
         Mobile1 obj1=new Mobile1();
         obj1.brand="Apple";
         obj1.price=1500;
@@ -41,4 +39,4 @@ public static void main(String[] args)
 
         //System.out.println(obj1.brand);
     }
-}
+}