Java 如何实现ArrayList以添加；“房间”；反对；“房子”；物品清单？

我目前正在做一项作业，我有两门课，一间教室，一间房子。作为任务的一部分，我需要启用house类将房间存储在

阵列列表中：

实现从键盘读取
House
类中的室内信息的方法-这应根据需要调用
room
构造函数。创建一个零参数House构造函数来调用这个新方法

我很抱歉，如果这是含糊不清的，或者已经在其他地方得到了回答，但在试图理解其他类似问题的解释后，我不知道如何将它们应用到我的情况中

如何将
房间的
ArrayList
应用于house类

House
：

import java.util.ArrayList;
import java.util.Scanner;

public class House {

private int idNum;
private static int internalCount = 0; 
private ArrayList rooms = new ArrayList();
private String address;
private int numRooms;
private String houseType; 

public House (String address, int numRooms, String houseType) {
idNum = internalCount++;

this.address = address;
this.numRooms = numRooms;
this.houseType = houseType;     
}


public House () {
int i = 0;  
idNum = ++internalCount;

Scanner scan = new Scanner(System.in);
scan.useDelimiter("\n");

System.out.println("Enter address of house:");   
address = scan.next();

System.out.println("Enter number of rooms:");   //Number of rooms in the House
numRooms = scan.nextInt();

 while (i < numRooms)  //This will loop until all rooms have been described
 {
 add.room = new Room[100]; //I understand this is incorrect but I don't know what  I should have in here
 i++;
 }

 System.out.println("Enter type of house:");
 houseType = scan.next();
 }
 public void addroom(String description, double length, double width)
 {

 }

 int getIdNum() {
 return idNum;
 }


 @Override

 public String toString()
 {
  String report = "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n";
  report += "Address: " + address + "\n";
  report += "No. of Rooms: " + numRooms + "\n";
  report += "House Type: " + houseType+ "\n";
  report += "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n";

  return report;
 }
 }

import java.util.Scanner;

public class Room {

private String description;
private double length;
private double width;

public Room (String description, double length, double width) {
this.description = description;
this.length = length;
this.width = width;     
}

public Room () {
Scanner scan = new Scanner(System.in);
scan.useDelimiter("\n");

System.out.println("Enter description of room:");
description = scan.next();

System.out.println("Enter length of room:");
length = scan.nextDouble();

 System.out.println("Enter width of room:");
 width = scan.nextDouble();
 }

 /*
 * Calculates and returns area of Room
 */
 public double getArea () {
 return length*width;
 }


 @Override
 public String toString() {
 return description + "- Length: " + length + "m; Width: " + width + 'm';
 }   
}

你查过ArrayList了吗

你需要像这样的东西：

rooms.add(new Room());

此外，我将使用Java泛型并定义列表：

private ArrayList<Room> rooms;

私人ArrayList房间；

这将使用并确保这只能是房间列表，而不是其他对象。这将为您省去一些痛苦，因为您不能无意中将房屋添加到房间列表中（由于编程错误）
您是否已检查了ArrayList

你需要像这样的东西：

rooms.add(new Room());

此外，我将使用Java泛型并定义列表：

private ArrayList<Room> rooms;

私人ArrayList房间；

这将使用并确保这只能是房间列表，而不是其他对象。这将为您节省一些痛苦，因为您不能无意中将房屋添加到房间列表中（通过编程错误）
使用
房间类型的列表

List<Room> rooms = new ArrayList<Room>();

while (i < numRooms)  //This will loop until all rooms have been described
{
  rooms.add(new Room()); //this is correct 
  i++;
}

List rooms=new ArrayList（）；
while（i
使用列表到
房间
类型

List<Room> rooms = new ArrayList<Room>();

while (i < numRooms)  //This will loop until all rooms have been described
{
  rooms.add(new Room()); //this is correct 
  i++;
}

List rooms=new ArrayList（）；
while（i因为这是家庭作业，我不会完全解决它，但给你一个基础工作……< /P>
public class House {
  private List<Room> rooms;

  public House() {
    rooms = new ArrayList<Room>();
  }

  public void addRoom(...) {
    Room room = new Room(...);
    rooms.add(room);
  }

  public int numRooms() {
    return rooms.size();
  }

  public Room getRoom(int roomNumber) {
    return rooms.get(roomNumber);
  }
}

public class Room {
  public Room(...) {
    ...
  }
}

公共类房屋{
私人名单室；
酒店（）{
房间=新的阵列列表（）；
}
公共房间（…）{
房间=新房间（…）；
房间。添加（房间）；
}
公共int numRooms（）{
返回房间。大小（）；
}
公共房间getRoom（内部房间号）{
返回房间。获取（房间号）；
}
}
公共教室{
公共房间（……）{
...
}
}

问题？
 < P>因为这是家庭作业，我不完全解决它，但给你一个工作的基础从…

public class House {
  private List<Room> rooms;

  public House() {
    rooms = new ArrayList<Room>();
  }

  public void addRoom(...) {
    Room room = new Room(...);
    rooms.add(room);
  }

  public int numRooms() {
    return rooms.size();
  }

  public Room getRoom(int roomNumber) {
    return rooms.get(roomNumber);
  }
}

public class Room {
  public Room(...) {
    ...
  }
}

ArrayList<Room> rooms = new ArrayList<Room>();
rooms.add(new Room());

公共类房屋{
私人名单室；
酒店（）{
房间=新的阵列列表（）；
}
公共房间（…）{
房间=新房间（…）；
房间。添加（房间）；
}
公共int numRooms（）{
返回房间。大小（）；
}
公共房间getRoom（内部房间号）{
返回房间。获取（房间号）；
}
}
公共教室{
公共房间（……）{
...
}
}

问题？
ArrayList rooms=new ArrayList（）；
ArrayList<Room> rooms = new ArrayList<Room>();
rooms.add(new Room());

房间。添加（新房间（））；
ArrayList房间=新建ArrayList（）；
房间。添加（新房间（））；
更改构造器方法添加一些有关房间的代码
ArrayList

public House(..., ArrayList aRooms) {

 ...
 rooms = aRooms;
}

public House() {

 ...
 // It's better to instantiate the rooms array here.
 rooms = new ArrayList<Room>();
}

更改构造函数方法，添加一些有关房间的代码
ArrayList

public House(..., ArrayList aRooms) {

 ...
 rooms = aRooms;
}

public House() {

 ...
 // It's better to instantiate the rooms array here.
 rooms = new ArrayList<Room>();
}

更改此循环：

while (i < numRooms)  //This will loop until all rooms have been described
{
  add.room = new Room[100]; //I understand this is incorrect but I don't know what I  should have in here
 i++;
}

while（i

致：

while（i
更改此循环：

while (i < numRooms)  //This will loop until all rooms have been described
{
  add.room = new Room[100]; //I understand this is incorrect but I don't know what I  should have in here
 i++;
}

while（i

致：

while（i
提出与arraylist相关的特定问题。提出与arraylist相关的特定问题。谢谢大家！这些答案中的任何一个都可以帮我澄清这一点！我真希望我5小时前就请求帮助。再次谢谢你们，谢谢你们！这些答案中的任何一个都可以帮我澄清这一点！我真希望我5小时前就请求帮助。再次感谢你。重新审视我的问题，这是完美的！非常感谢。重新审视我的问题，这是完美的！非常感谢。