覆盖 JComboBox getSelectedItem 不起作用

Question

我正在尝试使用此静态方法覆盖我的 JComboBox getSelectedItem 方法：

public static void setupID_TITLE_ComboBox(JComboBox jComboBox, String tableName) throws SQLException {
    // query to select ID and TITLE from profiles table
    String query = "SELECT ID,TITRE FROM " + tableName + ";";
    ResultSet myJComboResultSet = SQLTools.ExecuteQuery(query);
    
    ArrayList visualItems = new ArrayList(); // the Items of my combobox  [item1,item2]
    ArrayList idItems = new ArrayList(); // the corresponding IDs for each item [id1,id2]

    while (myJComboResultSet.next()) {
        visualItems.add(myJComboResultSet.getObject("TITRE")); // filling items set
        idItems.add(myJComboResultSet.getObject("ID")); // filling IDs set
    }
    
    System.out.println("IDItems=" + idItems); // checking that my Items are filled
    System.out.println("visualItems=" + visualItems); // checking that my IDs are filled
    
// creating a combobox of previous items
    jComboBox = new JComboBox(visualItems.toArray()) {
        ArrayList values = idItems;

// overriding the getSelectedItem to return the corresponding selected item's ID
        @Override
        public Object getSelectedItem() {
            Object get = values.get(super.getSelectedIndex());
            System.out.println("get = " + get);
            return get; 
        }

    };

}

我正在从另一个框架调用此方法:

   JComboBoxTools.setupID_TITLE_ComboBox(J_Users_Profile,"profiles");

但是执行起来就不行了。输出：

visualItems=[Admin,Teacher,Student]

IDItems=[0,3,5]

the selected item return value is : Teacher

不知道怎么办我要return3是老师的ID

完整项目位于：this link

谢谢。

Answer 1

我使用 mapComboBoxModel 获得了我想要的值

public static void setupID_TITLE_ComboBox(JComboBox jComboBox, String tableName) throws SQLException {

    String query = "SELECT ID,TITRE FROM " + tableName + ";";
    ResultSet myJComboResultSet = SQLTools.ExecuteQuery(query);

    HashMap myMap = new HashMap();
    while (myJComboResultSet.next()) {  
        myMap.put(myJComboResultSet.getObject("TITRE"), myJComboResultSet.getObject("ID"));
    }

    jComboBox.setModel(new MapComboBoxModel(myMap) {

        @Override
        public Object getValue(Object selectedItem) {
            return map_data.get(selectedItem); //To change body of generated methods, choose Tools | Templates.
        }

    });


}

我将 getValue 重写为 return ID。

if (myComponent instanceof JComboBox) {
            JComboBox jComboBox = (JComboBox) myComponent;
             MapComboBoxModel model = (MapComboBoxModel) jComboBox.getModel();
             values+=""+model.getValue(model.getSelectedItem())+",";                
        }

覆盖 JComboBox getSelectedItem 不起作用

overriding JComboBox getSelectedItem is not working

java

overriding

jcombobox