feat: Add VoidMethods class with displayInfo instance method

WHAT the code does:
- Defines a `VoidMethods` class with two instance variables:
  - `boolean value`
  - `String name`
- Constructor initializes both fields.
- `displayInfo()` is a **void method** that prints object details (does not return anything).
- `main()` creates an object (`true, "OK!"`) and calls `displayInfo()` to print info.

WHY this matters:
- Demonstrates **void methods** that perform actions instead of returning results.
- Shows how constructors initialize object state.
- Reinforces object-oriented design with instance variables and methods.

HOW it works:
1. `new VoidMethods(true, "OK!")` → assigns `value = true`, `name = "OK!"`.
2. `displayInfo()` → prints:
   - `"This object has a true value, and it's name is OK!"`.

Tips & gotchas:
- Void methods are best for **side effects** (printing, updating state), not calculations.
- Fields are package-private → best practice is to declare them `private` and use getters/setters.
- For debugging/printing, overriding `toString()` can be more versatile than a custom display method.
- Method naming (`displayInfo`) is clear, but could be renamed `printDetails` for more specificity.

Use-cases:
- Teaching example for **constructors, instance methods, and void return type**.
- Foundation for objects that report their state.
- Useful for logging or displaying information in object-oriented applications.
- Can be extended with more attributes and different display formats.

Short key: class-void methods-display info.

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

Author: Someshdiwan

Section10Methods/Methods 2.O/src/VoidMethods.java

@@ -1,27 +1,23 @@
-public class VoidMethods
-{
-    //Instance variables//
+public class VoidMethods {
+    //Instance variables
     boolean value;
     String name;
 
-    //Constructor//
-    public VoidMethods (boolean inputValue, String inputName)
-    {
+    //Constructor.
+    public VoidMethods (boolean inputValue, String inputName) {
         value = inputValue;
         name = inputName;
     }
 
-    //Instance method//
-    public void displayInfo()
-    {
+    //Instance method.
+    public void displayInfo() {
         System.out.println("This object has a " + value + " value, and it's name is " + name);
     }
 
-    public static void main(String[] args)
-    {
-        //create the object
+    public static void main(String[] args) {
         VoidMethods exampleObject = new VoidMethods(true, "OK!");
-        //invoke the displayInfo method
+
+        //invoke the object and displayInfo method.
         exampleObject.displayInfo();
     }
-}
+}