package bookingsystem;import java.sql.Connection;import java.sql.PreparedStatement;public class WALK_IN{    private int covers;    private String arrivalDate;    private String talno;    Connection cn = ConnectionDB.getCon();        WALK_IN(int covers,String arrivalDate,String talno)    {        this.covers=covers;        this.arrivalDate = arrivalDate;        this.talno = talno;            }        public void addWalk()    {        String sql = "INSERT INTO WALK_IN (COVERS,ARRIVALDATE,TALNO,ISPAYBILL) VALUES ("+this.covers                     +",'"+this.arrivalDate+"','"+this.talno+"'";        PreparedStatement ps = cn.prepareStatement(sql);        ps.executeUpdate();    }}