如何在Java中将Scanner集成到继承类中

import java.util.Scanner;

// 基类
class BaseClass {
    protected Scanner scanner; // 使用protected以便子类可以访问

    public BaseClass() {
        this.scanner = new Scanner(System.in);
    }

    // 提供一个方法来读取用户输入
    protected String getInput(String prompt) {
        System.out.print(prompt);
        return scanner.nextLine();
    }
}

// 子类
class DerivedClass extends BaseClass {
    public void askForName() {
        String name = getInput("Please enter your name: ");
        System.out.println("Hello, " + name + "!");
    }

    public void askForAge() {
        int age = Integer.parseInt(getInput("Please enter your age: "));
        System.out.println("You are " + age + " years old.");
    }
}

// 主类
public class Main {
    public static void main(String[] args) {
        DerivedClass derived = new DerivedClass();
        derived.askForName();
        derived.askForAge();
    }
}

@Override
protected void finalize() throws Throwable {
    try {
        if (scanner != null) {
            scanner.close();
        }
    } finally {
        super.finalize();
    }
}

public void askForAge() {
    try {
        int age = Integer.parseInt(getInput("Please enter your age: "));
        System.out.println("You are " + age + " years old.");
    } catch (NumberFormatException e) {
        System.out.println("Invalid input. Please enter a valid number.");
    }
}