list = Employee.search("");这句什么意思啊。懂的人帮忙看看啊。
import   java.sql.*;
import   java.util.*;
public   class   Employee   {
    private   long   id;
    private   String   firstName;
    private   String   lastName;
    private   String   title;
    private   String   address;
    private   String   city;

    public   static   void   main(String[]   args)   {
    ResultSet   rs;
    try   {
    Employee   employee,   newEmployee;
    List   list;
    //to   test   search   mehtod
    list   =   Employee.search( " ");
    System.out.println( "original--------------------------- ");
    for   (int   i=0;   i <list.size();i++)   {
    employee   =   (Employee)   list.get(i);
    System.out.printf( "%s\n ",employee);
    }

    //to   test   add   method
    newEmployee   =   new   Employee();
    newEmployee.setFirstName( "New ");
    newEmployee.add();
    list   =   Employee.search( " ");
    System.out.println( "a   new   Employee   added--------------------------- ");
    for   (int   i=0;   i <list.size();i++)   {
    employee   =   (Employee)   list.get(i);
    System.out.printf( "%s\n ",employee);
    }

    //to   test   the   load   method
    long   employeeId;
    employeeId   =   newEmployee.getId();
    newEmployee   =   new   Employee();
    newEmployee.setId(employeeId);
    newEmployee.load();
    System.out.printf( "%s\n ",newEmployee);

    //to   test   update   method
    newEmployee.setFirstName( "updated ");
    newEmployee.update();
    //System.out.printf( "%s\n ",employee);
    list   =   Employee.search( " ");
    System.out.println( "the   new   Employee   updated--------------------------- ");
    for   (int   i=0;   i <list.size();i++)   {
    employee   =   (Employee)   list.get(i);
    System.out.printf( "%s\n ",employee);
    }

    //to   test   delete   method
newEmployee.delete();
    list   =   Employee.search( " ");
    System.out.println( "the   new   Employee   deleted--------------------------- ");
    for   (int   i=0;   i <list.size();i++)   {
    employee   =   (Employee)   list.get(i);
    System.out.printf( "%s\n ",employee);
    }

    }   catch   (Exception   ex)     {
    System.out.println( "Exeption:   "   +   ex.getMessage());