单选题1. public class Employee {  2. String name；  3. double baseSalary；  4. Employee（String name， double baseSalary） {  5. this.name = name；  6. this.baseSalary = baseSalary；  7. }  8. }  And：  1. public class Salesperson extends Employee { 2. double commis

阅读和理解下面程序段： class Manager extends Employee{ public Manager(String n，double s，int year，int month，int day){ super(n，s，year，month，day)； bonus=0； } public double getSalary(){ double baseSalary-super．gerSalary()； return baseSalary+bonus； } public void setBonus(double b){bonus=b； ) private double bonus； } Manager是Employee的子类，其理由是( )。

A．Manager的适用范围较宽

B．extends关键字声明

C．Manager的域减小了

D．雇员是一个经理

1.publicclassEmployee{2.Stringname；3.doublebaseSalary；4.Employee（Stringname，doublebaseSalary）{5.this.name=name；6.this.baseSalary=baseSalary；7.}8.}And：1.publicclassSalespersonextendsEmployee{2.doublecommission；3.publicSalesperson（Stringname，doublebaseSalary，4.doublecommission）{5.//insertcodehere6.}7.}Whichcode，insertedatline7，completestheSalespersonconstructor？（）

A.this.commission=commission；

B.superb（）；commission=commission；

C.this.commission=commission；superb（）；

D.super（name，baseSalary）；this.commission=commission；

E.super（）；this.commission=commission；

F.this.commission=commission；super（name，baseSalary）；

试题六（共15分）

阅读以下说明和Java代码，填补Java代码中的空缺(1)～(6)，将解答写在答题纸的对应栏内。

【说明】

己知某公司按周给员工发放工资，其工资系统需记录每名员工的员工号、姓名、工资等信息。其中一些员工是正式的，按年薪分周发放（每年按52周计算）；另一些员工是计时工，以小时工资为基准，按每周工作小时数核算发放。

下面是实现该工资系统的Java代码，其中定义了四个类：工资系统类PayRoll，员工类Employee，正式工类Salaried和计时工类Hourly，Salaried和Hourly是Employee的子类。

【Java代码】

abstract class Employee{

protected String name; //员工姓名

protected int empCode; //员工号

protected double salary; //周发放工资

public Employee(int empCode, String name){

this.empCode= empCode;

this.name= name;

}

public double getSalary(){

return this.salary;

}

public abstract void pay();

}

class Salaried (1) Employee{

private double annualSalary;

Salaried(int empCode, String name, double payRate){

super(empCode, name);

this.annualSalary= payRate;

}

public void pay(){

salary= (2) ；//计算正式员工的周发放工资数

System.out.println(this.name+＂:＂+this.salary);

}

}

class Hourly (3) Employee{

private double hourlyPayRate;

private int hours;

Hourly(int empCode, String name, int hours, double payRate){

super(empCode, name);

this.hourlyPayRate= payRate;

this.hows= hours,

}

public void pay(){

salary= (4) ；//计算计时工的周发放工资数

System.out.println(this.name+＂:＂+this.salary);

}

}

public class PayRoll{

private (5) employees[]={

new Salaried(l001,＂Zhang San＂, 58000.00),

//此处省略对其他职工对象的生成

new Hourly(1005,＂Li＂, 12, 50.00)

}；

public void pay(Employee e[]){

for (int i=0;i<e.length; i++){

e[i].pay();

}

}

public static void main(String[] args)

{

PayRoll payRoll= new PayRoll();

payRoll.pay( (6) )；

double total= 0.0;

for (int i=0；i<payRoll.employees.length; i++){//统计周发放工资总额

total+=payRoll.employees[i].getSalary();

}

System.out.println(total);

}

}

阅读以下说明和Java代码，将应填入(n)处的字句写在对应栏内。

[说明]

本程序的功能是给公司的员工Tom，Jack，Green增加薪水。三人的职位分别是programmer， Manager，CEO。

程序由6个类组成：WorkerTest是主类，programmer，Manager，CEO三个类，薪水增加的规则是 programmer的涨幅是5%；Manager的是10%；CEO也是Manager，但是它除了有Manager的涨幅，还有1000元的bonus。接口SalaryRaise提供了一个增加薪水的方法raise()。

[java程序]

public class WorkerTest {

public WorkerTest( ) {}

public static void main( String[] args) {

Programmer programmer = new Programmer( "Tom" ,3000);

Manager manager = new Manager( "Jack" ,4000);

CEO ceo = new CEO( "Green" ,4000);

Worker [] worker = new Worker[3];

programmer, raise( );

manager, raise( );

ceo. raise( );

worker[0] = programmer;

worker [1] = manager;

worker[2] = ceo;

for ( int i = 0 ;i ＜ worker, length; i + + ) {

System. out. prinfln (" Name:" + worker [i]. getName ( ) +" \ tSalary:" + worker [i]. getSalary ());

public interface SalaryRaise { void raise( ); }

public class Worker {

public String name;

public double (1);

public Worker( ) {}

public String getName( ) {return name;}

public void setName( String name) {this. name = name;}

public double getSalary( ) {return salary;}

public void setSalary(double salary) { this. salary = salary; }

}

public class Programmer extends Worker implements (2) {

public Programmer( ) {}

public void raise( ) {

double pets=0.05;

double sala = this. getSalary( ) * (1 + pers);

this. setSalary (sala);

public Programmer( Siring name, double salary) t

this. name = name;

this. salary = salary;

public class Manager extends (3) implements SalaryRaise {

public Manager( ) { }

public Manager(String name, double salary) {

this. name = name;

this. salary = salary;

}

public void raise( ) {

double pets = 0.1;

double sala = this. getSalary() * (1 + pers);

this. setSalary(sala);

}

}

public class CEO extends Manager implements SalaryRaise {

public CEO() {}

public CEO( String name,double salary) {

this. name = name;

this. salary = salary;

}

public void raise( ) {

double bonus = 1000;

(4);

double sala = this. getSalary( );

(5);

this. setSalary(sala);

}

}