我不知道我能问这个问题有多好，但是给定一个文本文件，我需要解析并提取productid数据并将其存储在hashset中，userid数据并将其存储在hashset中，review/score数据并将其存储在arraylist中。它们还需要用于创建一个图，其中productid与userid之间的边相连。
数据可以在这里找到http://snap.stanford.edu/data/web-finefoods.html 你可以忽略复习/时间、复习/帮助、复习/总结和复习/文本信息，它们不需要存储在内存中。
我当前的代码如下所示：

import java.io.*;
import java.util.*;
import java.nio.charset.*;

public class Reviews
{
    String fileName = "newfinefoods.txt";
    GraphType<String> foodReview;
    HashSet<String> productID;
    HashSet<String> userID;
    ArrayList<String> review;

    int counter; //was using this to make sure I'm counting all the lines which I think I am

    public Reviews(){
        foodReview = new GraphType<>();
        productID = new HashSet<>();
        userID = new HashSet<>();
        review = new ArrayList<>();
        counter = 0;
    }

    public int numReviews(){
        return review.size();
    }

    public int numProducts(){
        return productID.size();
    }

    public int numUsers(){
        return userID.size();
    }

    public void setupGraph(){
        Scanner fileScanner;
        String line = "";
        try{
            fileScanner = new Scanner (new File (fileName), "UTF-8");
            String pr = "";
            while(fileScanner.hasNextLine()){
                line = fileScanner.nextLine();
                String[] reviewInfo = line.split(": ");
                String productInfo = reviewInfo[1];
                System.out.println(productInfo);
            }
        }

        catch (IOException e){
            System.out.println(e);
        }
    }

    public static void main(String[] args){
        Reviews review = new Reviews();
        review.setupGraph();
        System.out.println("Number of Reviews:" + review.numReviews());
        System.out.println("Number of Products:" + review.numProducts());
        System.out.println("Number of Users:" + review.numUsers());

    }
}

每当我运行代码时，在数组reviewinfo中查找1，它只打印一组数据，但是如果我将其更改为0，它似乎打印所有信息（而不是我需要的信息）。我需要创建这个图表，并从数据中获取信息，但我真的只是超级卡住，任何提示或帮助将非常感谢！
以下是数据示例：

product/productId: B001E4KFG0
review/userId: A3SGXH7AUHU8GW
review/profileName: delmartian
review/helpfulness: 1/1
review/score: 5.0
review/time: 1303862400
review/summary: Good Quality Dog Food
review/text: I have bought several of the Vitality canned dog food products and have found them all to be of good quality. The product looks more like a stew than a processed meat and it smells better. My Labrador is finicky and she appreciates this product better than  most.

product/productId: B00813GRG4
review/userId: A1D87F6ZCVE5NK
review/profileName: dll pa
review/helpfulness: 0/0
review/score: 1.0
review/time: 1346976000
review/summary: Not as Advertised
review/text: Product arrived labeled as Jumbo Salted Peanuts...the peanuts were actually small sized unsalted. Not sure if this was an error or if the vendor intended to represent the product as "Jumbo".

product/productId: B000LQOCH0
review/userId: ABXLMWJIXXAIN
review/profileName: Natalia Corres "Natalia Corres"
review/helpfulness: 1/1
review/score: 4.0
review/time: 1219017600
review/summary: "Delight" says it all
review/text: This is a confection that has been around a few centuries.  It is a light, pillowy citrus gelatin with nuts - in this case Filberts. And it is cut into tiny squares and then liberally coated with powdered sugar.  And it is a tiny mouthful of heaven.  Not too chewy, and very flavorful.  I highly recommend this yummy treat.  If you are familiar with the story of C.S. Lewis' "The Lion, The Witch, and The Wardrobe" - this is the treat that seduces Edmund into selling out his Brother and Sisters to the Witch.

product/productId: B000UA0QIQ