How to use binarySeach in Array?

[azuki ooh]

I have a method that goes like this. I'm suppose to make use of binarySearch method in array. Is this not how binarySeach method work?

 public static String caesarCipher(String text)
    {
        char[] alphaArray = {'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};
        String cipher = "";
        int pos = -1;
        
        for(int i=0; i<text.length(); i++)
        {
            pos = binarySearch(alphaArray, text.charAt(i)); // compilation error
            if(pos><text.length()-3)
                cipher += alphaArray[pos+3];
            else
                cipher += alphaArray[pos+3-26];
        }
        return cipher;
    }

>

[azuki ooh]

Resolved. Since binarySearch is a static method in Arrays, I need a Arrays.binarySearch(alpahaArray, 'a');

[Campbell Ritchie]

I can see no sign of binary searching, or any other type of searching, in that post.