Java第二次作业

1.编写“人”类及其测试类。属性：姓名、性别、年龄、身份证号码。

  package sss;
 import java.util.Scanner;
  public class Person 
  {
       String name;
 char sex;
       int age;
       String idcard;
    public void println（)
     {
         System.out.print("姓名是："+name );
         System.out.print("性别是："+sex);
         System.out.print("年龄是："+age);
         System.out.println("身份证号码是："+idcard);
     }
     public Person(String name,char sex,int age,String IdCard)
     {
         this.name=name;
         this.sex=sex;
        this.age=age;
         this.idcard=idcard;
         
    }
 }
    public class TestPerson
    {
       public static void main(String[] args) 
         {
             Scanner in= new Scanner(System.in);
           String name;
           char sex;
           int age;
           String idcard; 
          System.out.println("请输入姓名，性别，年龄，身份证号码：");
           name=in.next();
           sex=in.next().charAt(0);
           age=in.nextInt();
          IdCard=in.next();           
          Person object=new Person(name,sex,age,idcard);
           object.println();
         }
 }

 

2.编写“手机”类及其测试类。属性：手机品牌、手机型号。

  package ccc;
  import java.util.Scanner;
   public class Phone
   {
      String Phonebrand;  /*手机品牌*/
       String Phonemodel;  /*手机型号*/
     public void println()
     {
        System.out.println("该手机的品牌是："+Phonebrand);
      System.out.println("手机型号是："+Phonemodel);
    }
    
      public Phone(String Phonebrand,String Phonemodel) 
      {
          this.Phonebrand=Phonebrand;
          this.Phonemodel=Phonemodel;
      }
  }
 public class TestPhone {
 
     public static void main(String[] args)
     {   
        Scanner in=new Scanner(System.in);
           String Phonebrand,Phonemodel;
           System.out.println("请输入手机品牌和型号：");
           Phonebrand=in.next();
           Phonemodel=in.next();
          Phone object= new Phone(Phonebrand,Phonemodel);
          object.println();
     }

 }

3.编写“书籍”类及其测试类。属性：书名、书号、主编、出版社、出版时间、页数、价格。

 package ccc;
  public class Book
  {
    private String bookname;
      private String booknum;
      private String bookauthor;
      private String publishhouse;
      private String booktime;
      private int bookpage;
     private double bookprice;
     
     public Book(
                String bookname, String booknum,
                 String bookauthor, String publishhouse,
                 String booktime, int bookpage,double bookprice
                 )
     {
         super();
         this.bookname = bookname;
         this.booknum = booknum;
         this.bookauthor = bookauthor;
         this.publishhouse = publishhouse;
         this.booktime = booktime;
         this.bookpage = bookpage;
         this.bookprice = bookprice;
     }
 
     public void OutputInformation()
     {
         System.out.println("书名:"+bookname   书号:"+booknum);
         System.out.println("主编:"+bookauthor   出版社："+publishhouse);
         System.out.println("出版时间:"+booktime  页数:"+bookpage);
         System.out.println("价格:"+bookprice);
     }
 }
 public class TestBook 
 {
     public static void main(String args[])
     {
         Book b1=new Book("视听说“,
                           "12354","朱晓央",
                           "上海外语教育出版社","2015","236",
                          ,45.90);
         Book b2=new Book(”读写“,
                            "5456","郑树棠",
                            "外研社,"2017","106",
                           45.00 ,);
         b1.OutputInformation();
         System.out.println();
        b2.OutputInformation();
     }
 
 }

4.圆柱体类

  package zzz;
  
  public class Circle
 {
      final static double PI=3.1415;
      private double radius;
      public Circle()
     {
         radius=0;
     }
     public Circle(double r)
     {
         radius=r;
     }
     public double getRadius()
     {       
       return radius;
     }
     public double getPerimeter() //计算圆的周长
     {
         return radius*2*PI;
     }
     public double getArea() //计算圆的面积
    {
        return radius*radius*PI;
     }
     
 }
 class Cylinder extends Circle
 {
     double height;
     public Cylinder(double r,double h)
     {
         super(r);
         height=h;
    }
     public double getHeight() {
         return height;
     }
    public double getCylinderArea() //计算圆柱体表面积
     {
         return super.getPerimeter()*height+getArea()*2;
     }
    double getVol() //计算圆柱体的体积
     {
        return super.getArea()*height;
     }
     public void dispVol()
     {
         System.out.println("半径为："+getRadius());
         System.out.println("高为："+getHeight());
         System.out.println("底面积为："+getArea());
         System.out.println("表面积为："+getPerimeter());
         System.out.println("体积为："+getCylinderArea());
     }
     
 }
 public class TestCylinder 
 {
     public static void main(String[] args)
     {
         Cylinder c1=new Cylinder(10,20);
         Cylinder c2=new Cylinder(10,40);
         System.out.println("圆柱体c1的信息为：");
         c1.dispVol();
         System.out.println();
         System.out.println("圆柱体c2的信息为：");
         c2.dispVol();
         
     }
     
 }