使用java流进行字母大小写排列

import java.util.Arrays;
import java.util.stream.Collectors;

String letters = "aAbBcCdDeEfF";

String sortedLetters = Arrays.stream(letters.split(""))
        .sorted()
        .collect(Collectors.joining());

String lowercaseLetters = sortedLetters.toLowerCase();

String uppercaseLetters = sortedLetters.toUpperCase();

import java.util.Arrays;
import java.util.stream.Collectors;

public class LetterCaseSorting {
    public static void main(String[] args) {
        String letters = "aAbBcCdDeEfF";

        String sortedLetters = Arrays.stream(letters.split(""))
                .sorted()
                .collect(Collectors.joining());

        String lowercaseLetters = sortedLetters.toLowerCase();
        String uppercaseLetters = sortedLetters.toUpperCase();

        System.out.println("Sorted Letters: " + sortedLetters);
        System.out.println("Lowercase Letters: " + lowercaseLetters);
        System.out.println("Uppercase Letters: " + uppercaseLetters);
    }
}