### Question:
JdbcSource implements Source { private String getString(ResultSet resultSet, String columnName) { try { String result = resultSet.getString(columnName); if (result != null) { result = result.trim(); } if ("".equals(result)) { return null; } return result; } catch (SQLException sqlException) { return null; } } JdbcSource(final InstanceConfiguration config); @Override Object dump(); String getJdbcDriver(); String getJdbcUrl(); String getJdbcUser(); String getJdbcPassword(); String getJdbcSelectStatement();  }### Answer:
@Test public void testDB() throws SQLException { System.out.println("testDB"); Statement selectAll = connection.createStatement(); ResultSet selectAllResult = selectAll.executeQuery(SQL_SELECT_STATEMENT_TEST_1); while (selectAllResult.next()) { System.out.println("Results: " + selectAllResult.getString("Foreign_Id") + " " + selectAllResult.getString("Node_Label") + " " + selectAllResult.getString("Location")); } }