Order three cities

The problem

Write a program that prompts the user to enter three cities and displays them in ascending order. NOTE: Can't use sort() method or any type of arrays.

Breaking it down

The program states not to use Array.sort() so instead we created a stream from strings and called the Stream.sorted() method which will sort in ascending order. Finally to show the output we called Stream.forEach() passing in System.out::println

public static void main(String[] args) {

    Scanner input = new Scanner(System.in);
    System.out.print("Enter the first city: ");
    String s1 = input.nextLine();
    System.out.print("Enter the second city: ");
    String s2 = input.nextLine();
    System.out.print("Enter the third city: ");
    String s3 = input.nextLine();

    Stream.of(s1, s2, s3).sorted().forEach(System.out::println);


Enter the first city: Birtch Creek
Enter the second city: Adrian
Enter the third city: York
Birtch Creek