Java的类和对象基础

huangapple
go评论105阅读模式
英文:

Basics of classes and objects: Java

问题

  1. public class hotel{
  2.     private int Roomno;
  3.     private String Name; 
  4.     private int Charges_day; 
  5.     private int No_of_days;
  6.     
  7.     public hotel(){
  8.         Roomno = 0; 
  9.         Name = "";
  10.         Charges_day = 0;
  11.         No_of_days = 0; 
  12.     }
  13.     
  14.     public void Getit(int r, String n, int c, int no){
  15.         Roomno = r; 
  16.         Name = n;
  17.         Charges_day = c;
  18.         No_of_days = no;
  19.     }
  20.     
  21.     public String Showname(){
  22.         return Name;
  23.     }
  24.     
  25.     public int Showroomno(){
  26.         return Roomno;
  27.     }
  28.     
  29.     public int ShowCharges(){
  30.         return Charges_day;
  31.     }
  32.     
  33.     public int ShowNoOfDays(){
  34.         return No_of_days;
  35.     }
  36.     
  37.     public int Compute(){
  38.         return Charges_day * No_of_days; 
  39.     }
  40. }
英文:

The question that I received:

Define a class hotel with the following specifications:

Private members:

  1. Roomno            
  2. Name
  3. Charges_day     
  4. No_of_days

Public members:

  1. Getit()      -to enter the data members
  2. Showit()  to show the data member
  3. Compute()   -To calculate and return the total charges as charges_day * No_of_days

and a constructor function to initialize the data members.

The code I wrote:

  1. public class hotel{
  2.     private int Roomno;
  3.     private String Name; 
  4.     private int Charges_day; 
  5.     private int No_of_days;
  6.     
  7.     public hotel(){
  8.         Roomno = 0; 
  9.         Name = "";
  10.         Charges_day = 0;
  11.         No_of_days = 0; 
  12.     }
  13.     
  14.     public void Getit(int r, String n, int c, int no){
  15.         Roomno = r; 
  16.         Name = n;
  17.         Charges_day = c;
  18.         No_of_days = no;
  19.     }
  20.     
  21.     public String Showname(){
  22.         return Name;
  23.     }
  24.     public int  Showit(){
  25.         return Roomno;
  26.         return Charges_day;
  27.         return No_of_days;
  28.     }
  29.     
  30.     public int Compute(){
  31.         return (Charges_day*No_of_days); 
  32.     }
  33.     
  34. }

I am aware that I can't have more than 1 returns in one method function, but I'm unable to find a way around this.

答案1

得分: 0

关于要求，我建议您只需打印值

  1. public void Showit(){
  2.     System.out.println(Name+" "+Roomno+" "+Charges_day+" "+No_of_days);
  3. }

如果您需要一个返回对象的String表示的方法，请重写toString()

  1. public String toString(){
  2.     return Name + " " + Roomno + " " + Charges_day + " " + No_of_days;
  3. }

此外，Java 命名的约定是

  • 对于方法和属性使用 lowerCamelCase 表示
英文:

Regarding the requirement, I'd suggest you just print the values

  1. public void Showit(){
  2.     System.out.println(Name+" "+Roomno+" "+Charges_day+" "+No_of_days);
  3. }

If you need a method that return a String representation of your object, override toString()

  1. public String toString(){
  2.     return Name + " " + Roomno + " " + Charges_day + " " + No_of_days;
  3. }

Also Java convention for naming is

  • lowerCamelCase for methods and attributs

huangapple
  • 本文由 发表于 2020年4月7日 22:48:26
  • 转载请务必保留本文链接：https://go.coder-hub.com/61082796.html
  • class
  • java
  • object
  • public
匿名

发表评论

匿名网友

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen:

确定