java - 我有一个方法，我想向我的主方法返回三个不同的值

Question

假设我有下面这个程序。现在我想将用户的名字和姓氏传递到该方法中，而无需再次调用它并更改参数并使用户再次重新输入名字和姓氏。

我知道我可以使用两种不同的方法来查找名字和姓氏，但我想知道是否有一种方法可以做到这一点，而这只是一种方法。

import java.util.Scanner;

 public class Document3 {
public static void main(String[] args) {
    String name;
    name = getName("lastName"); //But how would I get my lastName WITHOUT recalling the method with "lastName" in the parameters?
    System.out.println(name); //I want to also get the other name into in my main method somehow
}
public static String getName(String nameOption) {
    Scanner x = new Scanner(System.in);
    String firstName = "";
    String lastName = "";
    String nameChoice = "";
    System.out.print("Please enter your first name: ");
    firstName = x.nextLine();
    System.out.print("\nPlease enter your last name: ");
    lastName = x.nextLine();
    if (nameOption.equals("firstName")) {
        nameChoice = firstName;
    }
    if (nameOption.equals("lastName")) {
        nameChoice = lastName;
    }
    return nameChoice; //how do I return both variables (firtName and lastName) and how would I access them
}

}

Answer 1

创建一个小型包装类，其中包含要返回的值，并返回该类的实例。

class Name
{
    final String firstName;
    final String lastName;

    Name(String first, String last)
    {
        firstName = first;
        lastName = last;
    }
}

<小时/>

如何使用:

public static void main(String[] args)
{
    Name name = getName();
    String first = name.firstName;
    String last = name.lastName;
}

public static Name getName()
{
    Scanner x = new Scanner(System.in);

    System.out.print("Please enter your first name: ");
    String firstName = x.nextLine();

    System.out.print("\nPlease enter your last name: ");
    String lastName = x.nextLine();

    return new Name(firstName, lastName);
}