Added till 18th

Stack15.java

@@ -0,0 +1,25 @@
+// write a java code to demonstrate Stack
+import java.util.*;
+public class Stack15 {
+	public static void main(String ar[]){
+		Stack<String> elec = new Stack<String>();
+		elec.push("fan");
+		elec.push("air conditioner");
+		elec.push("computer");
+		elec.push("iron");
+		elec.push("lights");
+		
+		Iterator<String> itr = elec.iterator();
+		while(itr.hasNext()){
+			System.out.println(itr.next());
+		}
+		String topOfStack = elec.peek();
+		System.out.println("The top electrical item is : " + topOfStack);
+		elec.pop();
+		System.out.println("After Pop : ");
+		Iterator<String> newItr = elec.iterator();
+		while(newItr.hasNext()){
+			System.out.println(newItr.next());
+		}
+	}
+}