Question

I need to chek where the char c index is on string , and if the char c is’nt there – return -1.

public class Find {
    private String _st;
    int i;

    public Find(String st) {
        _st = st;
    }

    public int whatIstheIndex(char c) {
        for (i=0;i<_st.length();i++)
            if (_st.charAt(i) == c) {
                return i;
            } else {
                return -1;
            }
        return i;
    }
}

I’m getting always -1. Why? Is the last return i; unnecessary?

Answer 1

Your code should be like this:

public int whatIstheIndex(char c) {

        for (int i = 0; i < _st.length(); i++)

            if (_st.charAt(i) == c) {
                return i;
            } 

        return -1;

    }

Hope this helps!