appengine-java8/spanner/src/main/java/com/example/appengine/spanner/SpannerTasks.java [359:381]:
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  private static void readOnlyTransaction(PrintWriter pw) {
    // ReadOnlyTransaction must be closed by calling close() on it to release resources held by it.
    // We use a try-with-resource block to automatically do so.
    try (ReadOnlyTransaction transaction =
        SpannerClient.getDatabaseClient().readOnlyTransaction()) {
      ResultSet queryResultSet =
          transaction.executeQuery(
              Statement.of("SELECT SingerId, AlbumId, AlbumTitle FROM Albums"));
      while (queryResultSet.next()) {
        pw.printf(
            "%d %d %s\n",
            queryResultSet.getLong(0), queryResultSet.getLong(1), queryResultSet.getString(2));
      }
      ResultSet readResultSet =
          transaction.read(
              "Albums", KeySet.all(), Arrays.asList("SingerId", "AlbumId", "AlbumTitle"));
      while (readResultSet.next()) {
        pw.printf(
            "%d %d %s\n",
            readResultSet.getLong(0), readResultSet.getLong(1), readResultSet.getString(2));
      }
    }
  }
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appengine-java11/spanner/src/main/java/com/example/appengine/spanner/SpannerTasks.java [359:381]:
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  private static void readOnlyTransaction(PrintWriter pw) {
    // ReadOnlyTransaction must be closed by calling close() on it to release resources held by it.
    // We use a try-with-resource block to automatically do so.
    try (ReadOnlyTransaction transaction =
        SpannerClient.getDatabaseClient().readOnlyTransaction()) {
      ResultSet queryResultSet =
          transaction.executeQuery(
              Statement.of("SELECT SingerId, AlbumId, AlbumTitle FROM Albums"));
      while (queryResultSet.next()) {
        pw.printf(
            "%d %d %s\n",
            queryResultSet.getLong(0), queryResultSet.getLong(1), queryResultSet.getString(2));
      }
      ResultSet readResultSet =
          transaction.read(
              "Albums", KeySet.all(), Arrays.asList("SingerId", "AlbumId", "AlbumTitle"));
      while (readResultSet.next()) {
        pw.printf(
            "%d %d %s\n",
            readResultSet.getLong(0), readResultSet.getLong(1), readResultSet.getString(2));
      }
    }
  }
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