Add CollectionDemo

Sem4/CollectionDemo.java

@@ -0,0 +1,60 @@
+import java.util.*;
+
+public class CollectionDemo {
+   public static void main(String[] args) {
+
+        // ArrayList
+        List<String> arrayList = new ArrayList<>();
+        arrayList.add("apple");
+        arrayList.add("banana");
+        arrayList.add("cherry");
+        System.out.println("ArrayList: " + arrayList);
+
+        // LinkedList
+        List<String> linkedList = new LinkedList<>();
+        linkedList.add("apple");
+        linkedList.add("banana");
+        linkedList.add("cherry");
+        System.out.println("LinkedList: " + linkedList);
+
+        // LinkedHashMap
+        Map<String, Integer> linkedHashMap = new LinkedHashMap<>();
+        linkedHashMap.put("apple", 1);
+        linkedHashMap.put("banana", 2);
+        linkedHashMap.put("cherry", 3);
+        System.out.println("LinkedHashMap: " + linkedHashMap);
+
+        // TreeMap
+        Map<String, Integer> treeMap = new TreeMap<>();
+        treeMap.put("apple", 1);
+        treeMap.put("banana", 2);
+        treeMap.put("cherry", 3);
+        System.out.println("TreeMap: " + treeMap);
+
+        // HashSet
+        Set<String> hashSet = new HashSet<>();
+        hashSet.add("apple");
+        hashSet.add("banana");
+        hashSet.add("cherry");
+        System.out.println("HashSet: " + hashSet);
+
+	// Create
+        List<String> names = new ArrayList<>();
+        names.add("Alice");
+        names.add("Bob");
+        names.add("Charlie");
+        System.out.println("Names: " + names);
+
+        // Read
+        String name = names.get(1);
+        System.out.println("Name at index 1: " + name);
+
+        // Update
+        names.set(1, "Bob Updated");
+        System.out.println("Names after update: " + names);
+
+        // Delete
+        names.remove(2);
+        System.out.println("Names after delete: " + names);
+	}
+}