第二次java做業

package com.wsy.person;
  import java.util.Scanner;
  class TestPerson
  {
       String name;
       char sex;
       int age;
       String IdCard;
      public void printf()
    {
         System.out.print("姓名是："+name+"   ");
        System.out.print("性別是："+sex+"   ");
        System.out.print("年齡是："+age+"   ");
        System.out.println("身份證號碼是："+IdCard);
     }
     public TestPerson(String name,char sex,int age,String IdCard)
     {
         this.name=name;
         this.sex=sex;
         this.age=age;
         this.IdCard=IdCard;
        
     }
}
    public class Person
   {
      public Person(String name, char sex, int age, String idCard) {
   // TODO Auto-generated constructor stub
  }

 public static void main(String[] args)
        {
            Scanner in= new Scanner(System.in);
          String name;
          char sex;
          int age;
          String IdCard;
          System.out.println("請輸入姓名，性別，年齡，身份證號碼：");
          name=in.next();
          sex=in.next().charAt(0);
          age=in.nextInt();
          IdCard=in.next();
         Person object=new Person(name,sex,age,IdCard);
        object.printf();
        }

 private void printf() {
  // TODO Auto-generated method stub
  
 }
}

package com.wsy.person;
import java.util.Scanner;
  class Phone
  {
      String Phonebrand; 
      String Phonename; 
    public void printf()
    {
       System.out.print("該手機的品牌是："+Phonebrand+"  ");
       System.out.println("手機型號是："+Phonename);
    }
   
      public Phone(String Phonebrand,String Phonename)
      {
          this.Phonebrand=Phonebrand;
          this.Phonename=Phonename;
      }
  }
 public class TestPhone {
 
     public static void main(String[] args)
     {  
         Scanner in=new Scanner(System.in);
          String Phonebrand,Phonename;
           System.out.println("請輸入手機品牌和型號：");
           Phonebrand=in.next();
           Phonename=in.next();
         Phone object= new Phone(Phonebrand,Phonename);
         object.printf();
     }
 
 }

package com.wsy.person;

class Cylinder
  {
      double h,r;
     
      public Cylinder(double high,double Radius)
      {
          this.h=high;
          this.r=Radius;
     }
     public double Bottomarea()
     {
         double s;
        s=2*3.14*r*r;
         return s;
     }
     public double  volume()
     {
           double v;
           v=Bottomarea()*h;
           return v;
     }
     public void print()
     {
        System.out.print("圓柱的半徑是:"+r+"  "+"高是:"+h+"  ");
         System.out.println("底面積是:"+Bottomarea()+"  "+"體積是:"+volume());
    
     }
 }
 public class TestCylinder {
 
    public static void main(String[] args) {
        
         Cylinder test1=new Cylinder(3,6);
         Cylinder test2=new Cylinder(4,7);
         test1.print();
         test2.print();
        
     }
  }