如何根据我在JComboBox中单击的项目更新Jtable？

Question

i want to populate my jtable with selected items in my jcombobox below is the code i wrote to perform the action but it does not.

please am still new in java so i will appreciation the help.

if(AssetCategories.getSelectedItem() == "LAND & BUILDINGS"){
        try {                
          String sql = "SELECT Description FROM items where Description_Code = 'LB' Order by id";
          pst=conn.prepareStatement(sql);
          rs=pst.executeQuery();
          dep_report.setModel(DbUtils.resultSetToTableModel(rs));
        } catch (SQLException ex) {
            Logger.getLogger(DepreciationReport.class.getName()).log(Level.SEVERE, null, ex);
        }



 } 

Answer 1

This condition doesn't make sense:

if(AssetCategories.getSelectedItem() == "LAND & BUILDINGS")

You're trying to compare an Object with a String (apples and oranges). I think you want to compare a String value of selected item with a given String: "LAND & BUILDINGS" .

In any case == is not the proper way to compare strings in java. Take a look to this topic: How do I compare strings in Java .

As stated there:

• == tests for reference equality.
• .equals() tests for value equality.