Stack

        Stack<Integer> stack = new Stack<>();
        stack.push(1);
        stack.push(2);
        stack.push(3);
        stack.push(4);
        stack.forEach(n->System.out.print(n));
        System.out.println();
        while (!stack.isEmpty()) {
            System.out.print(stack.pop());
        }

Queue

        Queue<Integer> queue = new LinkedBlockingDeque<>();
        queue.add(1);
        queue.add(2);
        queue.add(3);
        queue.add(4);
        queue.forEach(n->System.out.print(n));
        System.out.println();
        while(!queue.isEmpty()) {
            System.out.print(queue.poll());
        }

參考:

java 中的Stack、Queue、Deque