在tableview中显示数据时遇到问题

Question

我正在尝试从我的SQLite数据库中获取数据以显示在我的表视图中;但是，当我执行代码时，没有任何东西出现，我没有收到任何错误。我认为问题是“at”的返回值是值的位置而不是实际的字符串值。当我运行调试器时它会显示值，但是当我.addItem（at）返回的值是：[MAAT.ahtatable@ccc143f，MAAT.ahtatable @ 5b4f6e4b，MAAT.ahtatable @ 9623c2c，MAAT.ahtatable @ 59335ddd，MAAT.ahtatable @ 3532d728]

任何人都可以帮我解决这个问题

@Override
public void initialize(URL url, ResourceBundle rb) {

classCol.setCellValueFactory(
    new PropertyValueFactory<ahtatable,String>("classification"));        
thcCol.setCellValueFactory(                
    new PropertyValueFactory<ahtatable,String>("thc"));
capCol.setCellValueFactory(
    new PropertyValueFactory<ahtatable,String>("capability"));        
defCol.setCellValueFactory(
        new PropertyValueFactory<ahtatable,String>("definition"));        
scoreCol.setCellValueFactory(
    new PropertyValueFactory<ahtatable,Integer>("score"));
    objDbClass = new DBClass();
    try{
        con = objDbClass.getConnection();
        buildData();
    }catch (SQLException e){
    e.printStackTrace();
    } catch (ClassNotFoundException ex) {
        Logger.getLogger(MainScreenController.class.getName()).log(Level.SEVERE, null, ex);
    }
}

public void buildData(){
data = FXCollections.observableArrayList();
try{
String refresh = "SELECT * FROM HAZARD ORDER BY SCORE";
ResultSet rs = con.createStatement().executeQuery(refresh);

while(rs.next()){
        ahtatable at = new ahtatable();

        at.classified.set(rs.getString("CLASSIFICATION"));
        at.htc.set(rs.getString("HTC"));
        at.capability.set(rs.getString("EVENT"));
        at.definition.set(rs.getString("DEFINITION"));
        at.score.set(rs.getInt("SCORE"));
        data.add(at);                  
    }
    AHTAtable.setItems(data);
    System.out.println("table populated");
}catch (SQLException e) {
       e.printStackTrace();  
               System.out.println("Error on Building Data");  
    }


}

package MAAT;

import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;
public class ahtatable {   


   public SimpleStringProperty classified = new SimpleStringProperty();
   public SimpleStringProperty htc = new SimpleStringProperty(); 
   public SimpleStringProperty capability = new SimpleStringProperty();
   public SimpleStringProperty definition = new SimpleStringProperty();
   public SimpleIntegerProperty score = new SimpleIntegerProperty();

   public String getclassified() {
   return classified.get();

   }

   public String getdefinition() {
   return definition.get(); 
   }

  public String gethtc() {
  return htc.get();
   }

  public String getcapability() {
  return capability.get();
    }

  public Integer getscore() {
  return score.get();
   }    
    }