This tutorial will teach you how to make a Batch Processing Java JDBC Gui application. Establish the database Connection Connection con; PreparedStatement pst; ResultSet rs; public void Connect() { try { Class.forName("com.mysql.jdbc.Driver"); con = DriverManager.getConnection("jdbc:mysql://localhost/vmproducts","root",""); } catch (ClassNotFoundException ex) { } catch (SQLException ex) { } } Select the txtaccountno textfield right click >Key->Event->KeyReleased past the code inside the KeyReleased  …