code: public void writeToTable() {
      // [START bigtable_hw_write_rows_veneer]
      try {
        System.out.println("\nWriting some greetings to the table");
        String[] greetings = {"Hello World!", "Hello Bigtable!", "Hello Java!"};
        for (int i = 0; i < greetings.length; i++) {
          RowMutation rowMutation =
              RowMutation.create(tableId, ROW_KEY_PREFIX + i)
                  .setCell(COLUMN_FAMILY, COLUMN_QUALIFIER, greetings[i]);
          dataClient.mutateRow(rowMutation);
          System.out.println(greetings[i]);
        }
      } catch (NotFoundException e) {
        System.err.println("Failed to write to non-existent table: " + e.getMessage());
      }
      // [END bigtable_hw_write_rows_veneer]
    }
docs: Demonstrates how to write some rows to a table.