我正在嘗試用兩個 Jtables 創(chuàng)建一個 gui。一個輸出對象 Bike（如果可用），一個輸出對象 Rent。但是默認表模型不斷返回空點異常。如何使用值數(shù)組列表填充 JTable，然后將其添加到 JPanel 網(wǎng)格布局。我曾嘗試使用默認表模型和 TableModel 以及搜索無用的解決方案。這是一個基本的 GUI 學(xué)校項目存放數(shù)組的主類public static final ArrayList<Bike> bikes = new ArrayList<>();    public static final ArrayList<Customer> customers = new ArrayList<>();    public static final ArrayList<Rent> rents = new ArrayList<>();    ArrayList<Rent> toRemove = new ArrayList<Rent>();    //Create variables    private int customerID = 0;    private final LocalDate currentDate = LocalDate.now();    //Main Method    public static void main(String args[]) {        //Create gui        GUI fr = new GUI();        fr.setSize(1000, 600);        fr.setVisible(true);        fr.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);        //Create Initial Objects and fill Arrays        bikes.add(new Bike("Tarmac Disk Expert", 6000.00, "Mountain", true));        bikes.add(new Bike("Epic Hardtail Comp", 3500.00, "Mountain", true));        bikes.add(new Bike("Chisel Comp", 2000.00, "Road", true));        bikes.add(new Bike("Roubaix Sport", 3500.00, "Road", false));        bikes.add(new Bike("Turbo Levi Comp", 9500.00, "City", false));        bikes.add(new Bike("Venge Pro", 9400.00, "City", true));        bikes.add(new EBike("Turbo Como 2.0 650B", 4500.00, "Ebike", true, "Full Power"));        bikes.add(new EBike("Turbo Kenevo Expert", 9500.00, "Ebike", true, "Full Power"));        bikes.add(new EBike("Turbo Levo FSR", 5600.00, "Ebike", true, "Full Power"));        bikes.add(new EBike("Turbo Vado 4.0", 5600.00, "Ebike", true, "Power Assisted"));        bikes.add(new EBike("S-Works Turbo Levo", 4000.00, "Ebike", true, "Power Assisted"));        bikes.add(new EBike("Turbo Como 2.0 Low Entry", 6600.00, "Ebike", true, "Power Assisted"));        customers.add(new Customer(0001, "John Smith", true, "Roubaix Sport"));        customers.add(new Customer(0002, "Madamn Tuscoue", false, "N/A"));