combobox error at compile time

https://stackoverflow.com/questions/17895656

04-06-2022
|

Question

I want the combobox to store the name from database at runtime,so i creted a list but combobox is displaying an error...

        List<String> s = new ArrayList<String>();
        {
            try
            {
                Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
                Connection con =DriverManager.getConnection("jdbc:odbc:project","sa","123456");
                Statement stmt= con.createStatement();
                ResultSet rs=stmt.executeQuery("SELECT Name FROM company");
                i=0;
                while(rs.next()) {
                    s.add(rs.getString("Name"));
                }
            }
            catch(Exception ex) {             {
                JOptionPane.showConfirmDialog(f,ex);
            }
            cb=new JComboBox(s);
        }

Solution

The probable problem is that you are passing a List<String> reference to the JComboBox . One correct way to do this will be to convert the List<String> s to a String[] array and pass it to the constructor: JComboBox(E[] items)

 new JComboBox(s.toArray(new String[s.size()]));