使用Stream一行获取26个英文字母

List<String> A = Stream.iterate("A", e -> String.valueOf((char) (e.charAt(0) + 1))).limit(26).collect(Collectors.toList());
System.out.println(A);
String a = Stream.iterate("a", e -> String.valueOf((char) (e.charAt(0) + 1))).limit(26).collect(Collectors.joining(","));
System.out.println(a);