Replacing char in string help

[jimmy-lin]

This is what I was given to codes

    /**
     *  Write the function countCode.
     *  
     *  @param str the string to process.
     *  @return the number of times co?e appears in the string.
     *  
     *  Return the number of times that the string "code" 
     *  appears anywhere in the given string, except we'll 
     *  accept any letter for the 'd', so "cope" and "cooe" 
     *  count.
     *
     *  Some examples:
     *      countCode("aaacodebbb") returns 1
     *      countCode("codexxcode") returns 2
     *      countCode("cozexxcope") returns 2
     */

Here is my codes:

    public int countCode(String str)
    {
        int result = 0;

        int len = str.length() - 3;
        for (int i = 0; i < len; i++)
        {
        String word = str.substring(i, i + 4);
        if (word.equals("code"))        
        result = result + 1;
        }
        return result;
    }

My question is how, do you code it so you can replace charAt('d') to any alphabetic letters.

[mrmatt1111]

Because i'm in an evil mood: =)

public int countCode(String str)
{
   return (str.length()-str.replaceAll("co[a-z]e", "").length()) / 4;
}

[jimmy-lin]

cool, that the shorter version, and i just found out that all i need to do is replace

 if (word.equals("code"))

to

 if (word.matches("co\\we"))

[Fubarable]

I believe that if you use your regex with str.split(regex, -1) the length of the array returned will be of some interest.