在数据表employee中根据id删除员工信息，下列@Delete注解的写法正确的是（）。 A: @Delete("delete from employee where id = ?") B: @Delete("delete from employee") C: @Delete( delete from employee where id = D: {id} ) E: 以上说法都不正确

class Employee{ private static int nextID = 1; private int id;}在Employee对象中，每个对象都有（）字段，所有对象共享（）字段

class Employee{ private string id; public string Id; ________________//请填写正确的代码行 { return id; } set{if(id. Length>;2) id = value;} }应填写的代码是 A: let B: set C: get D: put

现有表Employee，字段：id（int）、firstname（varchar）、lastname（varchar）；以下sql语句错误的是（）

在员工管理系统中，查询表employee表中所有员工的姓名，字段:id(int),firstname(varchar),lastname(varchar),以下sql语句正确的是（）。 A: Select firstname +’.’+ lastname as ‘name’ from employee B: Select firstname +’.’+ lastname from employee C: Select ‘name’= firstname +’.’+ lastname from employee D: Select firstname,lastname from employee

有如下类的定义，创建Employee对象正确的是（） public class Employee{ private int age; private String name; public void Employee(){ } public Employee(int age){ this.age = age; } public Employee(String name){ this.name = name; } } A: Employee e = new Employee( ) B: Employee e = new Employee(10); C: Employee e = new Employee(tom); D: Employee e = new Employee(10,"tom");

‎阅读以下程序，说明Company类和Employee类是 关系。‎‎public class Company{ private Employee employee; public Employee getEmployee(){ return employee; } public void setEmployee(Employee employee){ this.employee=employee; } //公司运作 public void run(){ employee.startWorking(); } }‎

有如下类的定义，创建Employee对象错误的是（） public class Employee{ private int age; private String name; public Employee(int age){ this.age = age; } public Employee(String name){ this.name = name; } public Employee(int age,String name){ this(age); this.name = name; } } A: Employee emp = new Employee(10); B: Employee emp = new Employee("Tom"); C: Employee emp = new Employee(); D: Employee emp = new Employee(10,"Tom");

class Employee; class Manager extends Employee; class Director extends Employee;

They are Mr. Jackson's ______. A: employees B: employee C: a employee D: an employee