feat: Demonstrate key, value, and entry iteration using Java HashMap

🧠 Logic:
- Created a `HashMap<String, Integer>` to store student names and their ages.
- Populated the map with three entries: Alice, Bob, and Charlie.
- Used enhanced for-loops to:
  - Print all keys using `keySet()`.
  - Print all values using `values()`.
  - Print key-value pairs using `entrySet()` with `Map.Entry`.
- Effectively illustrates how Java maps (like dictionaries) can be traversed in multiple ways.

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

Author: Someshdiwan

Section8LoopAB/Loop 2.O/src/ForLoopDictionaries.java

@@ -4,33 +4,27 @@
 import java.util.Map;
 
 public class ForLoopDictionaries {
-    public static void main(String[] args)
-    {
+    public static void main(String[] args) {
         Map<String, Integer> student = new HashMap<>();
         student.put("Alice", 20);
         student.put("Bob", 22);
         student.put("Charlie", 19);
 
         // Iterating through keys
-
         System.out.println("Keys:");
-        for (String key : student.keySet())
-        {
+        for (String key : student.keySet()) {
             System.out.println(key);
         }
 
         // Iterating through values
         System.out.println("\nValues:");
-        for (int value : student.values())
-        {
+        for (int value : student.values()) {
             System.out.println(value);
         }
 
         // Iterating through key-value pairs
-
         System.out.println("\nKey-Value Pairs:");
-        for (Map.Entry<String, Integer> entry : student.entrySet())
-        {
+        for (Map.Entry<String, Integer> entry : student.entrySet()) {
             System.out.println(entry.getKey() + ": " + entry.getValue());
         }
     }