java继承3个小题

1、实现一个名为Person的类和它的子类EmployeeEmployee有两个子类FacultyStaff具体要求如下:

1Person类中的属性有:姓名nameString类型),地址addressString类型),电话号码telphoneString类型)和电子邮件地址emailString类型)

2Employee类中的属性有:办公室officeString类型),工资wagedouble类型),受雇日期hiredateString类型)

3Faculty类中的属性有:学位degreeString类型),级别levelString类型)

4Staff类中的属性有:职务称号dutyString类型)。

public class Person {
    private String name;
    private String address;
    private String telphone;
    private String email;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public String getTelphone() {
        return telphone;
    }
    public void setTelphone(String telphone) {
        this.telphone = telphone;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    
}
public class Employee extends Person {
    private String office;
    private double wage;
    private String hiredate;
    public String getOffice() {
        return office;
    }
    public void setOffice(String office) {
        this.office = office;
    }
    public double getWage() {
        return wage;
    }
    public void setWage(double wage) {
        this.wage = wage;
    }
    public String getHiredate() {
        return hiredate;
    }
    public void setHiredate(String hiredate) {
        this.hiredate = hiredate;
    }
    
}
public class Faculty extends Employee{
    private String degree;
    private String level;
    public String getDegree() {
        return degree;
    }
    public void setDegree(String degree) {
        this.degree = degree;
    }
    public String getLevel() {
        return level;
    }
    public void setLevel(String level) {
        this.level = level;
    }
    
}
public class Staff extends Employee {
    private String duty;

    public String getDuty() {
        return duty;
    }

    public void setDuty(String duty) {
        this.duty = duty;
    }
    
}

测试:

public class F {
    public static void main(String[] args) {
        Faculty a=new Faculty();
        a.setName("张三");
        a.setTelphone("123456788");
        a.setDegree("本科");
        a.setLevel("一级");
        a.setEmail("12345877@qq.com");
        System.out.println("员工姓名:"+a.getName()+" 电话"+a.getTelphone()+
                " 学位"+a.getDegree()+" 级别"+a.getLevel()+" 邮箱"+a.getEmail());
        Employee b=new Employee();
        b.setName("张三");
        b.setTelphone("123456788");
        b.setEmail("12345877@qq.com");
        b.setOffice("A座407");
        b.setWage(20000);
        System.out.println("员工姓名:"+b.getName()+" 电话"+b.getTelphone()+
                " 邮箱"+a.getEmail()+" 办公室"+b.getOffice()+" 工资"+b.getWage());
    }
}

2、编写一个Car类,具有String类型的属性品牌,具有功能drive定义其子类AodiBenchi,具有属性:价格、型号;具有功能:变速;定义主类E,在其main方法中分别创建AodiBenchi的对象并测试对象的特性。

public class Car {
    private String pinpa;                  //品牌属性
    private double sudu;
    
    public String getPinpa() {
        return pinpa;
    }

    public void setPinpa(String pinpa) {
        this.pinpa = pinpa;
    }

    public double getSudu() {
        return sudu;
    }

    public void setSudu(double sudu) {
        this.sudu = sudu;
    }

    public String drive(){
        return "汽车已启动!";
    }
    
}
public class Aodi extends Car{
    private double jiage;
    private String xinghao;
    
    public double getJiage() {
        return jiage;
    }

    public void setJiage(double jiage) {
        this.jiage = jiage;
    }

    public String getXinghao() {
        return xinghao;
    }

    public void setXinghao(String xinghao) {
        this.xinghao = xinghao;
    }

    public double biansu(){
        double sudu=super.getSudu()+10;
        return sudu;
    }

}
public class Benchi extends Aodi{
    public double biansu(){
        double sudu=super.getSudu()+20;
        return sudu;
    }

}

测试:

public class E {
    public static void main(String[] args){
        Aodi aodi=new Aodi();
        aodi.setJiage(500000);
        aodi.setXinghao("奥迪A6");
        System.out.println("奥迪车的型号是:"+aodi.getXinghao()+" 价格是:"+aodi.getJiage());
        System.out.println(aodi.drive());
        System.out.println("启动后的速度为:"+aodi.biansu());
        Benchi benchi=new Benchi();
        benchi.setJiage(800000);
        benchi.setXinghao("奔驰2000");
        System.out.println("奔驰车的型号是:"+benchi.getXinghao()+" 价格是:"+benchi.getJiage());
        System.out.println(benchi.drive());
        System.out.println("启动后的速度为:"+benchi.biansu());
        
    }
}

3、按要求编写一个Java应用程序:

1)编写一个矩形类Rect,包含:

两个属性:矩形的宽width;矩形的高height

两个构造方法:

1.一个带有两个参数的构造方法,用于将widthheight属性初化;

2.一个不带参数的构造方法,将矩形初始化为宽和高都为10

两个方法:

求矩形面积的方法area()

求矩形周长的方法perimeter()

2)通过继承Rect类编写一个具有确定位置的矩形类PlainRect,其确定位置用

矩形的左上角坐标来标识,包含:

添加两个属性:矩形左上角坐标startXstartY

两个构造方法:

4个参数的构造方法,用于对startXstartYwidthheight属性初始化;

不带参数的构造方法,将矩形初始化为左上角坐标、长和宽都为0的矩形;

添加一个方法:

判断某个点是否在矩形内部的方法isInside(double x,double y)。如在矩形内,返回true, 否则,返回false

 提示:点在矩形类是指满足条件:x>=startX&&x<=(startX+width)&&y<startY&&y>=(startY-height)

3)编写PlainRect类的测试程序创建一个左上角坐标为(1010),长为20,宽为10的矩形对象;计算并打印输出矩形的面积和周长;判断点(25.513)是否在矩形内,并打印输出相关信息。

public class Rect {
    //声明属性
    private double width;
    private double height;
    //带参数构造方法
    public Rect(double width,double height){
        this.width=width;
        this.height=height;
    }
    //无参的构造方法
    public Rect(){
        this.width=10;
        this.height=10;
    }
    //成员方法       周长
    public double perimeter(){
        double perimeter;
        perimeter=(width+height)*2;
        return perimeter;
    }
    //成员方法      面积
    public double area(){
        double area;
        area=width*height;
        return area;
    }
    //getter/setter方法
    public double getWidth() {
        return width;
    }
    public void setWidth(double width) {
        this.width = width;
    }
    public double getHeight() {
        return height;
    }
    public void setHeight(double height) {
        this.height = height;
    }
}public class PlainRect extends Rect {//声明属性
    private int startX;
    private int startY;
    //含参构造方法
    public PlainRect(int startX,int startY,double width,double height){
        super(width,height);                  //调用父类构造方法
        this.startX=startX;
        this.startY=//不含参构造方法
    public PlainRect(){
super(0,0);
this.startX=0; this.startY=0; } //成员方法 判断点与矩形位置 public boolean isInside(double x,double y){return x>=startX&&x<=(startX+getWidth())&&y<startY&&y>=(startY-getHeight()); } }
public class TestPlainRect {

    public static void main(String[] args) {
        //创建矩形
        PlainRect rect =new PlainRect(10,10,20,10);
        //打印输出
        System.out.println("长为20,宽为10的矩形的面积是:"+rect.area());
        System.out.println("长为20,宽为10的矩形的周长是:"+rect.perimeter());
        if(rect.isInside(25.5, 13)==true){
            System.out.println("点(25.5,13)在矩形内");
        }
        else{
            System.out.println("点(25.5,13)不在矩形内");
        }
    }

}

 

posted @ 2016-09-20 17:52  荆小八  阅读(674)  评论(0编辑  收藏  举报