public class Reset_Table1 {
    private Component frame;
    {
        try {
            Connection connection=null;
            dbConnection obj_dbConnection=new dbConnection();
            connection=obj_dbConnection.getConnection();
            ResultSet rs=null;

            String query = "TRUNCATE TABLE device_1";
            connection.createStatement().execute(query);

            System.out.println("device_1 deleted");
            JOptionPane.showMessageDialog(frame,
                    "Reseted");
        } catch (SQLException e) {
            JOptionPane.showMessageDialog(frame,
                    "Reset failed",
                    "Reset failed",
                    JOptionPane.ERROR_MESSAGE);
            e.printStackTrace();
        }
    }
}