[编程题]字符串分隔

static String changeTo8N(String str) {
if (!("".equals(str)) && str != null) {
//System.out.println(8 - (str.length()%8));
int n = str.length();
if (n%8 != 0) {
for (int i = 0; i < 8 - (n%8); i++) {
str += "0";
}
}
return str;
} else {
return "";
}
}
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
String s1 = sc.nextLine();
String s2 = sc.nextLine();
String s = changeTo8N(s1) + changeTo8N(s2);
for (int i = 0; i < s.length()/8; i++) {
System.out.println(s.substring(8i,8i+8)) ;
}
}