未添加到arraylist的项目

Question

我正在尝试将鲜花添加到flowerpack并且没有添加它们。第一部分是一个GUI，但一旦＆＃34;输入新花＆＃34;检查它切换到控制台。所有控制台打印行都会出现，我输入信息，但是我在flowerpack.add处放置了一个断点，但它永远不会到达，所以我的flowerpack始终为空。我在这里做错了什么？

private static void addFlower(ArrayList<Plant> flowerPack)  {
    Scanner in = new Scanner(System.in);
    JFrame frame = new JFrame("HelloWorldSwing");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    frame.setLayout(new FlowLayout());
    JLabel flowerLabel = new JLabel("Enter new flower: ");
    frame.getContentPane().add(flowerLabel);
    JCheckBox checkFlower = new JCheckBox();
    frame.getContentPane().add(checkFlower);
    checkFlower.addActionListener(new ActionListener() { 
        public void actionPerformed(ActionEvent e) { 

            System.out.print("Please enter flower ID: ");
            int plantID = in.nextInt();
            in.nextLine(); 
            System.out.print("Please enter flower Name: ");
            String flowerName = in.nextLine();
            System.out.print("Please enter flower color: ");
            String flowerColor = in.nextLine();
            System.out.print("Does flower have thorns? Yes or no: ");
            String flowerThorns = in.nextLine();
            System.out.print("Does flower smell? Yes or no: ");
            String flowerSmell = in.nextLine();

            flowerPack.add(new Flower(plantID, flowerName,
                flowerColor, flowerThorns, flowerSmell));
        } 
    });