Question

In java if we want to navigate the resultset which we get from executing the query using 2 buttons forward and backward. What is the way we can perform this task

    private void nextActionPerformed(java.awt.event.ActionEvent evt) {                                            
        if(evt.getSource()==bt_previous){
        DBUtil util = new DBUtil();
             try {
                        Connection con = util.getConnection();
                        PreparedStatement stmt = con.prepareStatement("SELECT * FROM DETAILS where id=?");
                        ResultSet rs;
                        String rm = id.getText().trim();
                        stmt.setLong(1, Long.parseLong(rm));
                        rs = stmt.executeQuery();
                        while(rs.next()){

                        String a = rs.getString("weight");
                        txtboxwgt.setText(a);
                        String b = rs.getString("note_state");
                        cbnotstat.setSelectedItem(b);
                        String c = rs.getString("dm_state");
                        cbdmnstat.setSelectedItem(c);
                                      }
                   } catch (Exception e) {
                             JOptionPane.showMessageDialog(null, e.getMessage());
                         }
            }


        } 

Answer 1

Make an entity class Detail:

public class Detail {
    private String weight;
    private String noteState;
    private String dmState;

    public Detail() {

    }

    public Detail(String weight, String noteState, String dmState) {
        this.weight = weight;
        this.noteState = noteState;
        this.dmState = dmState;
    }
    // getters and setters below
}

In your nextActionPerformed method when you iterate over the result set, create a new instance of your entity and add it to some collection, i.e. LinkedList:

                List<Detail> allDetails = new LinkedList<Detail>();
                while(rs.next()) {

                    String a = rs.getString("weight");
                    String b = rs.getString("note_state");
                    String c = rs.getString("dm_state");
                    allDetail.add(new Detail (a, b, c));
                }

Then you can navigate the allDetails in any manner supported by the LinkedList. Or consider using another collection if LinkedList doesn’t fit your needs.