java写个遍历aaa-zzz反过来的字符串

以下是Java代码实现：

public class ReverseLetters {
    public static void main(String[] args) {
        for (char i = 'z'; i >= 'a'; i--) {
            for (char j = 'z'; j >= 'a'; j--) {
                for (char k = 'z'; k >= 'a'; k--) {
                    System.out.print(i);
                    System.out.print(j);
                    System.out.print(k);
                    System.out.print(" ");
                }
            }
        }
    }
}

输出结果：

zzz zzy zzx zzw zzv zz ... aaa