Question

我正在创建一个FileManager类，该类正在创建arraylists，以便在数据之间使用@@保留文本文件中输入的信息，并在文本中输出整行数据。我的问题是，我只能将其打印出我需要全部三个数据的一部分。

示例：玉米片@@一块玉米片@@ 200 炸奶酪@@奶酪面包屑和炸@@ 300 Peirogies @@装满土豆@@ 250 椒盐脆饼@@大型椒盐脆饼@@ 150

我的代码仅输出“一堆墨西哥玉米片”或“装满土豆”

我的FileManager：

 package edu.pitt.is17.ndi4.menumanager;
    import java.io.BufferedReader;
    import java.io.FileReader;
    import java.util.ArrayList;

public class FileManager {

final static String SPLIT = "@@";   //string of separating chars

public static ArrayList<Entree> readEntrees (String fileName){

    //all the file read methods are the same, only the first will be commented
    ArrayList<Entree> entrees = new ArrayList<Entree>();   //create array list to hold data read
    int arrayIndex=0;   //tracks the array index and increments after each line of the file

    try {
        FileReader fr = new FileReader(fileName);
        BufferedReader br = new BufferedReader(fr);
        String line = null;
        while ((line = br.readLine()) != null) {

            int first = line.indexOf(SPLIT);   //determine the two spots in the line that split the data
            int second = line.indexOf(SPLIT, first + 1);

            //add to the arraylist a new object of each menu type using the constructor and substrings of the file line
            entrees.add(arrayIndex,                                    //index of arraylist starts at 0 and goes up each line
                    new Entree(line.substring(0,first),                  //Name of item
                            line.substring(first+2,second),                    //Description
                            Integer.parseInt(line.substring(second+2)),0));       //calories

            arrayIndex++;   //increment the arraylist index for the next line
        }
        br.close();
        fr.close();
    } catch (Exception e) {
        System.out.println(e.getMessage());
    }
    return entrees;
}

public static ArrayList<Side> readSides (String fileName){
    ArrayList<Side> sides = new ArrayList<Side>();
    int arrayIndex = 0 ;
    try {
        FileReader fr = new FileReader(fileName);
        BufferedReader br = new BufferedReader(fr);
        String line = null;
        while ((line = br.readLine()) != null) {
            int first = line.indexOf(SPLIT);
            int second = line.indexOf(SPLIT, first + 1);
            sides.add(arrayIndex, new Side(line.substring(0,first), line.substring(first+2,second), Integer.parseInt(line.substring(second+2))));
            arrayIndex++;
        }
        br.close();
        fr.close();
    } catch (Exception e) {
        System.out.println(e.getMessage());
    }
    return sides;
}

public static ArrayList<Beer> readBeers (String fileName){
    ArrayList<Beer> beers = new ArrayList<Beer>();
    int arrayIndex = 0 ;
    try {
        FileReader fr = new FileReader(fileName);
        BufferedReader br = new BufferedReader(fr);
        String line = null;
        while ((line = br.readLine()) != null) {
            int first = line.indexOf(SPLIT);
            int second = line.indexOf(SPLIT, first + 1);
            beers.add(arrayIndex, new Beer(line.substring(0,first), line.substring(first+2,second), Integer.parseInt(line.substring(second+2))));
            arrayIndex++;
        }
        br.close();
        fr.close();
    } catch (Exception e) {
        System.out.println(e.getMessage());
    }
    return beers;
}

public static ArrayList<Appetizer> readAppetizers (String fileName){
    ArrayList<Appetizer> appetizers = new ArrayList<Appetizer>();
    int arrayIndex = 0 ;
    try {
        FileReader fr = new FileReader(fileName);
        BufferedReader br = new BufferedReader(fr);
        String line = null;
        while ((line = br.readLine()) != null) {
            int first = line.indexOf(SPLIT);
            int second = line.indexOf(SPLIT, first + 1);
            appetizers.add(arrayIndex, new Appetizer(line.substring(0,first), line.substring(first+2,second), Integer.parseInt(line.substring(second+2))));
            arrayIndex++;
        }
        br.close();
        fr.close();
    } catch (Exception e) {
        System.out.println(e.getMessage());
    }
    return appetizers;
}

}

我的菜单随机化：

package edu.pitt.is17.ndi4.menumanager;
import java.util.ArrayList;

public class MenuRandomize {

private ArrayList<Entree> entrees = new ArrayList<Entree>();
 private ArrayList<Side> sides = new ArrayList<Side>();
 private ArrayList<Beer> beers = new ArrayList<Beer>();
 private ArrayList<Appetizer> appetizers = new ArrayList<Appetizer>();


public MenuRandomize (String entreeFile, String sideFile, String 
beerFile, String appetizerFile){
   entrees = FileManager.readEntrees(entreeFile);
   sides = FileManager.readSides(sideFile);
   beers = FileManager.readBeers(beerFile);
   appetizers = FileManager.readAppetizers(appetizerFile);


   public Menu randomMenu() {
   //create a new menu object
   Menu randMenu = new Menu ("Random Sample Plate");

   //use setter for each item, based on size of array list * random
   randMenu.setEntree(entrees.get((int)(entrees.size()*Math.random())));
   randMenu.setSide(sides.get((int)(sides.size()*Math.random())));
   randMenu.setBeer(beers.get((int)(beers.size()*Math.random())));
   randMenu.setAppetizer(appetizers.get((int)(appetizers.size()*Math.random())));

   return randMenu;

我的MenuTester：

package edu.pitt.is17.ndi4.menumanager;

public class MenuTester{
public static void main(String[] args){
    MenuRandomize randomize = new MenuRandomize("data/entrees.txt",
        "data/sides.txt","data/beers.txt","data/appetizers.txt");
    Menu myMenu = randomize.randomMenu();
    System.out.println(myMenu.description()+"\nTotal calories "+
                        myMenu.totalCalories());
}

}

运行此命令时，我只会得到以下输出：

开胃菜：装满土豆

主菜：精心挑选的优质牛排烧烤炉

侧面：煮熟的土豆在烤箱中烤一点黄油

啤酒：味道像铁！

总卡路里1460

例如，我需要在此随机菜单中显示以下内容：“ Peirogies装满土豆250

任何帮助将不胜感激，我觉得我在忽略某些东西，如果需要更多代码才能找到此错误，可以提供此错误。谢谢您的帮助。

如何获取FileManager类和MenuRandomize类以输出完整描述

0 个答案: