//package eshop;import java.util.*;import java.sql.*;public class RegisterBean {  Connection conn;  boolean registerResult;  public RegisterBean() {    registerResult=false;  }  public void setConn(Connection conn){    this.conn=conn;  }  public boolean register(String username,String password,String question,String answer){    try {      Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,                                        ResultSet.CONCUR_READ_ONLY);      String sql1="SELECT * FROM Customers WHERE Username='"+username+"'";      ResultSet rsLogin=stmt.executeQuery(sql1);      if(rsLogin.next()){          this.registerResult=false;      }else{          String sql2="INSERT INTO Customers(Username,Password,Question,Answer) VALUES('"+username+"','"+password+"','"+question+"','"+answer+"')";          stmt.executeUpdate(sql2);          this.registerResult=true;      }      rsLogin.close();      stmt.close();    }catch(SQLException e){        e.printStackTrace();    }    return this.registerResult;  }}