java输出带空格的字符串(1)

public class YuGiOh

{

public static void main ( String[] args )

{

String input = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

String regex = "(.{1})";

input = input.replaceAll (regex,"$1 ");

System.out.println (input);

} }