feat: Add Calculate class for product price computation with user input

WHAT the code does:
- Defines an `Item` class with `main()` entry point.
- Creates a `Calculate` class that:
  - Reads product price (`p`) and quantity (`q`) via `Scanner`.
  - Multiplies them to get total (`p * q`).
  - Prints the computed total cost.

WHY this matters:
- Demonstrates **basic class separation** in Java:
  - `Item` handles execution entry.
  - `Calculate` encapsulates business logic (data input, calculation, output).
- Shows beginner-friendly use of **Scanner**, encapsulation, and simple arithmetic.
- Useful as a stepping stone into structured, object-oriented Java programs.

HOW it works:
1. Program starts in `Item.main()`.
2. Instantiates `Calculate` object.
3. Calls methods in sequence:
   - `getData()` → reads price and quantity.
   - `Result()` → multiplies values to compute total.
   - `Show()` → prints the total.

Tips & gotchas:
- It’s good practice to close the `Scanner` after input (`sc.close()`).
- Currently no input validation (negative values allowed).
- Logic is tied to console I/O; separating calculation from input/output would improve testability.

Use-cases:
- Small utility programs (shopping cart total, billing).
- Teaching tool for methods, objects, and **class design** in Java.
- Basis for extending into discount logic, multiple items, or tax computation.

Short key: class-calculate product-price-scanner.

Signed-off-by: https://github.com/Someshdiwan <[email protected]>

Author: Someshdiwan

Section10Methods/src/Item.java

@@ -1,35 +1,31 @@
 import java.util.Scanner;
 
-class Item
-{
-    public static void main(String[] args)
-    {
+class Item {
+    public static void main(String[] args) {
         Calculate c = new Calculate();
         c.getData();
         c.Result();
         c.Show();
     }
 }
 
-class Calculate
-{
+
+
+class Calculate {
     int p, q, total;
-    void getData()
-    {
+    void getData() {
         Scanner sc = new Scanner(System.in);
         System.out.println("Enter the price of product:");
         p = sc.nextInt();
         System.out.println("Enter the quantity of the product:");
         q = sc.nextInt();
     }
 
-    void Result()
-    {
+    void Result() {
         total = p*q;
     }
 
-    void Show()
-    {
+    void Show() {
         System.out.println("Total price is: "+total);
     }
-}
+}