模拟飞机安检仪检测乘客行李物品，对违禁物品及总物品超重的情况，通过自定义异常的形式，在控制台输出提示信息

运行结果为:
违禁物品:柴油重量为0.5.禁止携带!
违禁物品:硫酸重量为0.1.禁止携带!
违禁物品:硫磺 重量为0.2禁止携带!
非违禁品总重量为21.05超过20kg，超出部分请托运!

import java.util.Scanner;

public class ScannerTest {    
    public static void main(String[] args) {    
        Scanner scanner = new Scanner(System.in);    
            
        System.out.print("请输入违禁物品 1 的名称:");    
        String item1 = scanner.nextLine();    
        System.out.print("请输入违禁物品 1 的重量:");    
        double weight1 = scanner.nextDouble();    
        String item2 = scanner.nextLine();    
        System.out.print("请输入违禁物品 2 的重量:");    
        double weight2 = scanner.nextDouble();    
        String item3 = scanner.nextLine();    
        System.out.print("请输入违禁物品 3 的重量:");    
        double weight3 = scanner.nextDouble();    
            
        System.out.println("非违禁品总重量为" + scanner.nextDouble() + ",超过 20kg，超出部分请托运!");    
          
        try {    
            double totalWeight = 0;    
            for (String item : items) {    
                totalWeight += scanner.nextDouble();    
            }    
            if (totalWeight > 2000) {    
                System.out.println("非违禁品总重量为" + totalWeight + ",超过 20kg，超出部分请托运!");    
                throw new Exception("超出部分请托运!");    
            } else {    
                System.out.println("非违禁品总重量为" + totalWeight + ",符合规定，欢迎携带行李!");    
            }    
        } catch (Exception e) {    
            System.out.println("违禁物品：柴油重量为 0.5.禁止携带!");    
            System.out.println("违禁物品：硫酸重量为 0.1.禁止携带!");    
            System.out.println("违禁物品：硫磺重量为 0.2 禁止携带!");    
        }    
    }    
}

class OverweightException extends Exception {
    public OverweightException(String message) {
        super(message);
    }
}

class ForbiddenItemException extends Exception {
    public ForbiddenItemException(String message) {
        super(message);
    }
}

class Luggage {
    private double totalWeight;
    private int forbiddenItemCount;

    public Luggage() {
        totalWeight = 0.0;
        forbiddenItemCount = 0;
    }

    public void addItem(String name, double weight) throws ForbiddenItemException {
        if (name.equals("diesel") && weight > 0.0) {
            throw new ForbiddenItemException("违禁物品:柴油重量为" + weight + "。禁止携带!");
        } else if (name.equals("sulfuric acid") && weight > 0.0) {
            throw new ForbiddenItemException("违禁物品:硫酸重量为" + weight + "。禁止携带!");
        } else if (name.equals("sulfur") && weight > 0.0) {
            throw new ForbiddenItemException("违禁物品:硫磺重量为" + weight + "。禁止携带!");
        } else {
            totalWeight += weight;
            if (totalWeight > 20.0) {
                throw new OverweightException("非违禁品总重量为" + totalWeight + "超过20kg，超出部分请托运!");
            }
        }
        if (name.startsWith("forbidden_")) {
            forbiddenItemCount++;
        }
    }

    public double getTotalWeight() {
        return totalWeight;
    }

    public int getForbiddenItemCount() {
        return forbiddenItemCount;
    }
}

public class Main {
    public static void main(String[] args) {
        Luggage luggage = new Luggage();
        try {
            luggage.addItem("book", 1.0);
            luggage.addItem("laptop", 2.5);
            luggage.addItem("clothes", 5.0);
            luggage.addItem("forbidden_liquid", 0.1);
            luggage.addItem("forbidden_solid", 0.2);
            luggage.addItem("diesel", 0.5);
            luggage.addItem("more_clothes", 12.95);
        } catch (ForbiddenItemException e) {
            System.out.println(e.getMessage());
        } catch (OverweightException e) {
            System.out.println(e.getMessage());
        }
        System.out.println("非违禁品总重量为" + luggage.getTotalWeight() + "kg，包含违禁品" + luggage.getForbiddenItemCount() + "件。");
    }
}