Madness.java

package;

public final class Madness {
  public static void main(final String[] args) {
    final Stack<Integer> stack = new Stack<>();

    stack.add(1);
    stack.add(2);
    stack.add(3);
    stack.push(4);

    System.out.println("stack:");
    for(final int i : stack) {
      System.out.println(i);
    }

    final LinkedList<Integer> list = new LinkedList<>();

    list.add(1);
    list.add(2);
    list.add(3);
    list.push(4);

    System.out.println("list:");
    for(final int i : list) {
      System.out.println(i);
    }
  }
}

/*
stack:
1
2
3
4
list:
4
1
2
3
*/