java Run-length encoding

Question

I have no idea how to start my assignment.

We got to make a Run-length encoding program,

for example, the users enters this string:

aaaaPPPrrrrr

Answer 1

public String runLengthEncoding(String text) {
    String encodedString = "";

    for (int i = 0, count = 1; i < text.length(); i++) {
        if (i + 1 < text.length() && text.charAt(i) == text.charAt(i + 1))
            count++;
        else {
            encodedString = encodedString.concat(Integer.toString(count))
                    .concat(Character.toString(text.charAt(i)));
            count = 1;
        }
    }
    return encodedString;
}

Try this one out.