// List channels associated with the user.
List<Channel> listOfChannels = channels.getItems();
// The user's default channel is the first item in the list.
Channel defaultChannel = listOfChannels.get(0);
String channelId = defaultChannel.getId();
PrintStream writer = System.out;
if (channelId == null) {
writer.println("No channel found.");
} else {
writer.println("Default Channel: " + defaultChannel.getSnippet().getTitle() +
" ( " + channelId + " )\n");
printData(writer, "Views Over Time.", executeViewsOverTimeQuery(analytics, channelId));
printData(writer, "Top Videos", executeTopVideosQuery(analytics, channelId));
printData(writer, "Demographics", executeDemographicsQuery(analytics, channelId));