@Nonnull public String toDumpString() { return "CddbAlbum\n" + "trackFrameOffsets: " + Arrays.stream(cddb.getTrackFrameOffsets()) .mapToObj(String::valueOf) .collect(joining(" ")) + "\n" + "discLenght: " + cddb.getDiscLength() + "\n" + properties.entrySet().stream() .map(e -> String.format("%s: %s", e.getKey(), e.getValue())) .collect(joining("\n")); } }