Question

I’m trying to scroll over all the contents of a database. How do I properly do this:

conc conclass = new conc();
        Connection conn = conclass.dbConnect();
        try{


       Statement statement=conn.createStatement();
        ResultSet rs;
        String sql;
        rs=statement.executeQuery("SELECT * FROM q_table");

        if(rs.next()){
        String yo=rs.getString("Question");
        jTextArea1.setText(yo);
        }





        }catch(Exception e){e.printStackTrace();}

And here’s my class for connecting to the database:

 public Connection dbConnect() {
    try {
        String db_connect_string="jdbc:mysql://localhost:3306/questions";
        String db_userid="root";
        String db_password="1234";
        Class.forName("com.mysql.jdbc.Driver").newInstance();
        Connection conn = DriverManager.getConnection(db_connect_string, db_userid, db_password);


        return conn;

    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}

What is wrong with my code? It loads the first record when I click on the scroll button. But when I click it again. It doesn’t do anything at all.

Answer 1

You need to keep the Resultset open. For every click on the button, you must call rs.next() once. After that, a new row will copied into the ResultSet.