src/main/java/org/jinstagram/http/URLUtils.java
public static String formURLDecode(String string) {
        Preconditions.checkNotNull(string, "Cannot decode null string");

        try {
            return URLDecoder.decode(string, UTF_8);
        } catch (UnsupportedEncodingException uee) {
            throw new IllegalStateException(ERROR_MSG, uee);
        }
    }
public static String formURLDecode(String string) {
        Preconditions.checkNotNull(string, "Cannot decode null string");

        try {
            return URLDecoder.decode(string, UTF_8);
        } catch (UnsupportedEncodingException uee) {
            throw new IllegalStateException(ERROR_MSG, uee);
        }
    }
Decodes a application/x-www-form-urlencoded string

@param string form-urlencoded string
@return plain string