Merge pull request #125 from saurabh12nxf/hashmap-example-#43

Hashmap example #43

src/Data Structures/HashMap/HashMapExample.java

@@ -0,0 +1,30 @@
+import java.util.HashMap;
+
+public class HashMapExample {
+    public static void main(String[] args) {
+
+        HashMap<String, Integer> map = new HashMap<>();
+
+        map.put("Apple", 10);
+        map.put("Banana", 20);
+        map.put("Orange", 30);
+
+
+        System.out.println("Value for key 'Apple': " + map.get("Apple"));
+
+
+        map.remove("Banana");
+        System.out.println("HashMap after removing 'Banana': " + map);
+
+
+        System.out.println("Iterating over HashMap:");
+        for (String key : map.keySet()) {
+            System.out.println("Key: " + key + ", Value: " + map.get(key));
+        }
+
+        System.out.println("Contains key 'Orange': " + map.containsKey("Orange"));
+        System.out.println("Contains value 30: " + map.containsValue(30));
+        System.out.println("Contains key 'Banana': " + map.containsKey("Banana"));
+        System.out.println("Contains value 20: " + map.containsValue(20));
+    }
+}