字典序创建最大和最小的子串

string = "hello"
sorted_string = ''.join(sorted(string))
min_substring = sorted_string[0]
max_substring = sorted_string[-1]
print("最小子串:", min_substring)
print("最大子串:", max_substring)

import java.util.Arrays;

public class Main {
    public static void main(String[] args) {
        String string = "hello";
        char[] charArray = string.toCharArray();
        Arrays.sort(charArray);
        String sortedString = new String(charArray);
        String minSubstring = sortedString.substring(0, 1);
        String maxSubstring = sortedString.substring(sortedString.length() - 1);
        System.out.println("最小子串: " + minSubstring);
        System.out.println("最大子串: " + maxSubstring);
    }
}