JAVA: try catch 异常

Question

我不确定在主方法中抛出多个异常的最佳方法。这是我采取的方法，我想知道这种方法是否正确

  public static void main(String[] args)  {

        File nFile = new File("ProductData.txt");
        File file = new File("CustomerData.txt");
        File pFile = new File("PurchaseOrderDataFile.txt");
        try {
            Scanner pScan = new Scanner(pFile);
            Scanner scan = new Scanner(file);
            //Makes ElectronicsEquipmentSupplier object with the month and year product array
            ElectronicsEquipmentSupplier ees = new ElectronicsEquipmentSupplier
        (1, 12, InputFileData.readProductDataFile(nFile));
            //Adds successive customer records to suppliers customer list
            for (int i = 0; i < 28; i++) {
                ees.addNewCustomer(InputFileData.readCustomerData(scan));
            }
            for (int i = 0; i <= 24; i++) {
                String poByMonth = InputFileData.readPurchaseOrderDataFile(pScan); //Brings list in by months
                String[] purchaseOrder = poByMonth.split("\\s+");
                ees.startNewMonth(); //When the months are split by the @ it adds a new month
                for (int j = 0; j <= purchaseOrder.length - 1; j++) {
                    String[] result = purchaseOrder[j].split("#");
                    int qty = Integer.parseInt(result[3]);
                    ees.addNewPurchaseOrder(result[0], result[1], result[2], qty);
                    double orderTotal = 0;
                    for (Product p : ees.getRangeOfProducts()) {
                        if (p.getProductCode().equals(result[2])) {
                            orderTotal = p.getPricePerUnit() * qty;
                        }
                    }
                    CustomerDetails customer = ees.getDetails().findCustomer(result[1]);
                    customer.setTotalPrice(orderTotal + customer.getTotalPrice());
                    if (result[1].substring(0, 1).equals("P")) {
                        System.out.println("Customer ID: " + (result[1]));
                        System.out.println("Discount: " + customer.getDiscountRate());
                    }
                }
            }
        }   //Catches exceptions
        catch(IllegalCustomerIDException| IllegalProductCodeException |
                IncorrectPurchaseOrderException | CustomerNotFoundException | IOException ex){
            //Outputs exceptions if they are caught 
            System.out.println(ex);
        }
    }

如您所见，我已将所有内容放入一个大型 try catch 中，并立即抛出所有异常。这似乎是一个很好的简洁方法，但我不确定这是否是一个好的做法

Answer 1

您还可以执行以下操作:

public static void main(String[] args)  {
    try {
        ...
    } catch(IllegalCustomerIDException e) {
       ...
    } catch(IllegalProductCodeException e) {
       ...
    } catch(IncorrectPurchaseOrderException e) {
       ...
    } catch(CustomerNotFoundException e) {
       ...
    } catch(IOException e) {
       ...
    }
}