PROGRAM TO PUT HTML LINKS AROUND URLS STRINGS in Java

import java.util.*;
import java.io.*;
public class URLify
{
public static char[] URLify(char[] chars, int len)
{
int spaces = countSpaces(chars, len);
int end = len - 1 + spaces *2;
for (int i = len - 1; i >= 0; i-)
{if (chars[i] == ' ')
{
chars[end - 2] ='%';
chars[end - 1] ='2';
chars[end] = '0';
end -= 3;
}else
{
chars[end] =chars[i]; end--;
}
}return chars;
}
static int countSpaces(char[] chars, int len)
{int count = 0;
for (int i = 0; i < len;i++)
if (chars[i] == ' ') count++;
return count;
}
public static void main(String[] args)
throws IOException
{
char[] chars = "Mr John Smith".toCharArray();
System.out.println(URLify(chars, 13));
}
}