StackDemo.java

// Stack demo based on the article from http://www.25hoursaday.com/CsharpVsJava.html#same
import java.util.Stack;

class StackDemo {
 // universal method using generics and wildcards
 public static void printStack(Stack<?> stack) {
 System.out.println("Printing stack:");
 while (!stack.empty()) {
 System.out.print(stack.pop() + " ");
 }
 System.out.println();
 }

 public static void main(String[] args) {
 // create an int stack
 Stack<Integer> intStack = new Stack<Integer>();
 // add some items to the stack
 intStack.add(50);
 intStack.add(2);
 intStack.add(10);
 intStack.add(12);
 // print the stack content
 printStack(intStack);
 // create a String stack
 Stack<String> sStack = new Stack<String>();
 // add some items again
 sStack.add("piggy");
 sStack.add("sofa");
 sStack.add("peas");
 sStack.add("umbrella");
 // print the stack content
 printStack(sStack);
 }
}