first commit

TestJavaCollection4.java

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+// Write a java code to demo stack
+import java.util.*;
+public class TestJavaCollection4{
+public static void main(String args[]){
+Stack<String> stack = new Stack<String>();
+stack.push("Ayush");
+stack.push("Garvit");
+stack.push("Amit");
+stack.push("Ashish");
+stack.push("Garvit");
+Iterator<String> itr=stack.iterator();
+while(itr.hasNext()){
+System.out.println(itr.next());
+}
+String topElement = stack.peek();
+System.out.println("The top element of the stack is: "+ topElement);
+stack.pop()
+System.out.println("After POP");
+for(String element : stack){
+    System.out.println(element);
+}
+}
+}