Java Substring Comparsons

 We define the following terms:

• Lexicographical Order, also known as alphabetic or dictionary order, orders characters as follows:
  

  For example, ball < cat, dog < dorm, Happy < happy, Zoo < ball.

• A substring of a string is a contiguous block of characters in the string. For example, the substrings of abc are a, b, c, ab, bc, and abc.

Given a string, , and an integer, , complete the function so that it finds the lexicographically smallest and largest substrings of length .

Function Description

Complete the getSmallestAndLargest function in the editor below.

getSmallestAndLargest has the following parameters:

• string s: a string
• int k: the length of the substrings to find

Returns

• string: the string ' + "\n" + ' where and are the two substrings

Input Format

The first line contains a string denoting .
The second line contains an integer denoting .

Constraints

•  consists of English alphabetic letters only (i.e., [a-zA-Z]).

Sample Input 0

welcometojava
3

Sample Output 0

ava
wel

Explanation 0

String  has the following lexicographically-ordered substrings of length :

We then return the first (lexicographically smallest) substring and the last (lexicographically largest) substring as two newline-separated values (i.e., ava\nwel).

The stub code in the editor then prints ava as our first line of output and wel as our second line of output.

SOLUTION:

import java.io.*;

import java.util.*;

public class Solution {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        String line = scanner.nextLine();

        int k = scanner.nextInt();

        String minSubstring = line.substring(0,k);

        String maxSubstring = line.substring(0,k);

        for (int i = 1; i < line.length()-k+1; i++) {

            String sub = line.substring(i,i+k);

            if (sub.compareTo(minSubstring) < 0) {

                minSubstring = sub;

            }

            if (sub.compareTo(maxSubstring) > 0) {

                maxSubstring = sub;

            }

        }

        System.out.println(minSubstring);

        System.out.println(maxSubstring);

    }

}