serialize a list of string and deserialize it

import java.util.*;
public class combineStrings{
public static void main(String[] args) {
String[] arr = {"abc%cde", "a#aa", "haha"};
for(String s : arr) {
System.out.println(s);
}
String result = serialize(arr);
System.out.println(result);
String[] newArr = deserialize(result);
for(String s : newArr) {
System.out.println(s);
}
}
public static String serialize(String[] arr) {
StringBuilder sb = new StringBuilder();
sb.append(arr.length + "#");
for (String s : arr) {
sb.append(s.length() + "%");
}
for (String s : arr) {
sb.append(s);
}
return sb.toString();
}
public static String[] deserialize(String s) {
String[] sizeAndContent = s.split("#");
//could be splitting to 2
int len = Integer.parseInt(sizeAndContent[0]);
s = s.substring(sizeAndContent[0].length()+1);
String[] eachSize = s.split("%");
int[] size = new int[len];
int total = 0;
for (int i = 0; i < len; i++) {
size[i] = Integer.parseInt(eachSize[i]);
total += size[i];
}
String content = s.substring(s.length() - total, s.length());
String[] result = new String[len];
for (int i = 0; i < len; i++) {
result[i] = content.substring(0, size[i]);
content = content.substring(size[i]);
}
return result;
}
}