如何告诉java程序将下一条匹配的记录检索到默认表模型中。
下面是我到目前为止的家庭作业
jTable tb1 和默认表模型 dtm 对我来说是必修课。

private void Show_My_LettersActionPerformed(java.awt.event.ActionEvent evt) {                                                
        Connection conn = null;
        Statement stmt = null;
        try {
            Class.forName("com.mysql.jdbc.Driver");

            System.out.println("Connecting to a selected database...");
            conn = DriverManager.getConnection(url, "root", "root");
            System.out.println("Connected database successfully...");

            System.out.println("Creating statement...");
            stmt = conn.createStatement();
            String sql = "SELECT * from LCI where SUB_ID = '" + SUB_ID_.getText() + "' AND L_DATE = '" + DATE.getText() + "'";
            ResultSet rs1, rs2, rs3, rs4, rs5, rs6, rs7;
            rs1=j.getData("select COUNT(*) from LCI");

            try (ResultSet rs = stmt.executeQuery(sql)) {
                DefaultTableModel dtm = (DefaultTableModel) tb1.getModel();
                while (rs.next()) {
                    String L_ID_ = rs.getString("L_ID");
                    String L_DATE_ = rs.getString("L_DATE");
                    String heading = rs.getString("HEADING");
                    String sub_id = rs.getString("SUB_ID");

                    System.out.print("ID: " + L_ID_);
                    System.out.print(", Letter date: " + L_DATE_);
                    System.out.print(", Heading " + heading);
                    System.out.println(", Subject ID " + sub_id);

/* This gives the correct out put when debug is done.
    But the below code doesn't retrive the full out put. 
    It gives only the very first record matching with the user inputs*/

                    Vector v = new Vector();
                    Vector v1 = new Vector();
                    Vector v2 = new Vector();
                    Vector v3 = new Vector();

                    JOptionPane.showMessageDialog(this, "Done");
                    dtm.getColumnName(1);
                    v.addElement(rs.getString(1));
                    dtm.addColumn(v);

                    dtm.getColumnName(3);
                    v1.addElement(rs.getString(3));
                    dtm.addColumn(v1);

                    dtm.getColumnName(10);
                    v2.addElement(rs.getString(10));
                    dtm.addColumn(v2);
                    // stmt.executeQuery("SELECT * FROM   LCI WHERE  L_ID IN(SELECT (L_ID + 1)FROM   LCI  WHERE  L_DATE = '"+DATE.getText()+"'");

                  dtm.addRow(v3);
                 //stmt.executeQuery("SELECT * FROM   LCI WHERE  L_ID IN(SELECT (L_ID '"+(+1)+"')FROM   LCI  WHERE  L_DATE = '"+DATE.getText()+"'");
                }
            }
        } catch (SQLException se) {
            se.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (stmt != null) {
                    conn.close();
                }
            } catch (SQLException se) {
                se.printStackTrace();
            }
            try {
                if (conn != null) {
                    conn.close();
                }
            } catch (SQLException se) {
                se.printStackTrace();
            }
        }// TODO add your handling code here:
    }