java - 让用户创建业务或个人联系人的代码

Question

我有一个 PersonalContact 类和一个 BusinessContact 类设置，我想使用这个驱动程序来提示用户输入联系信息。输入信息后，我想使用这些类来打印它们的 toStrings 以显示联系信息。我认为我需要创建一个新的 PersonalContact 或 BusinessContact 对象，对吗？基类称为 Contact，是一个抽象类。

import java.util.Scanner;

public class PlannerMain {
    static Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) {

        while (true) {

            System.out.println("Create new contact?");
            System.out.println("1.Personal contact ");
            System.out.println("2.Business Contact ");
            System.out.println("3.Exit.");

            int option = scanner.nextInt();

            if (option == 1) { //Create Personal Contact

                System.out.println("Name?");
                String name = scanner.next();

                System.out.println("Age?");
                int age = scanner.nextInt();

                System.out.println("Address?");
                String address = scanner.next();

                System.out.println("City?");
                String city = scanner.next();

                System.out.println("State?");
                String state = scanner.next();

                System.out.println("Zip");
                String zip = scanner.next();

                PersonalContact pc = new PersonalContact;

            } // End option 1

            else if (option == 2) { // Create Business Contact

                System.out.println("Name?");
                String name = scanner.next();

                System.out.println("Age?");
                int age = scanner.nextInt();

                System.out.println("Business Phone?");
                String businessPhone = scanner.next();

                System.out.println("Cellphone?");
                String cellPhone = scanner.next();

                BusinessContact bc = new BusinessContact;

            } // End option 2

            else if (option == 3) { /** Terminates the program */
                System.exit(0);
            } // End option 3
        } // End while

    }// End void main

}// End

Answer 1

如果你的 person 类是这样的:

public abstract class Contact{
    String name;
    int age;

    public Contact(String name, int age){
        this.name = name;
        this.age = age;
    }
}

那么您的 BusinessContact 可能如下所示

public class BusinessContact extends Contact {
    String businessPhone;
    String cellPhone;

    public BusinessContact(String name, int age, String businessPhone, String cellPhone){
        super(name, age);
        this.businessPhone = businessPhone;
        this.cellPhone = cellPhone;
    }

    public String toString(){
        return "Name: " + this.name + " Age: " + Integer.toString(age) + " Business Phone: " + businessPhone + " Cell Phone: " + cellphone;
    }
}

然后你可以替换这一行:

BusinessContact bc = new BusinessContact;

用这个:

BusinessContact bc = new BusinessContact(name, age, businessPhone, cellPhone);

System.out.println(bc.toString());