java - 尝试按字母顺序显示 3 个随机选择的城市

Question

想要以任意顺序输入 3 个城市，并希望 java 按字母顺序显示它们。考虑过使用交换选项，但认为随附的代码可以与“if”“else”语句一起使用。任何想法...谢谢

import java.util.Scanner;

public class OrderTwoCities {
    public static void main(String[] args) {
    Scanner input = new Scanner(System.in);

    // Prompt the user to enter two cities
    System.out.print("Enter the first city: ");
    String city1 = input.nextLine();
    System.out.print("Enter the second city: ");
    String city2 = input.nextLine();
    System.out.print("Enter the third city: ");
    String city3 = input.nextLine();

    if (city1.compareTo(city2) < 0 && city2.compareTo(city3) < 0)
        System.out.println("The cities in alphabetical order are " +
        city1 + " " + city2 + " " + city3);
    else
        System.out.println("The cities in alphabetical order are " +
        city3 + " " + city2 + " " + city1);
    }
}

Answer 1

可以使用Arrays.sort(arr)方法对arr元素进行排序示例:

Scanner input = new Scanner(System.in);
String [] arr = new String[3];
// Prompt the user to enter two cities
System.out.print("Enter the first city: ");
arr[0] = input.nextLine();
System.out.print("Enter the second city: ");
arr[1] = input.nextLine();
System.out.print("Enter the third city: ");
arr[2] = input.nextLine();
Arrays.sort(arr);
for (int i = 0; i < arr.length; i++) {
    System.out.println(arr[i]);
}