从 .txt 文件中读取数据并保存为类变量

Question

I'm trying to create a class called ExpectedProdInfo . This class will need to have many variables to store data, 182 to be exact. I want to keep the data stored in a .txt file and call a method that will read the file line by line using the first line as the first class attribute and so on.

example: prod_info.txt contains:

AAAA
BHJB
7657
.
.
.

Need to assign each line in order to a class attribute:

String attr1 = "AAAA";
String attr2 = "BHJB";
String attr3 = "7657";
.
.
.

If anyone new of a good way to achieve this while keeping the code easy to maintain I'd love to hear your solutions.

Answer 1

Check out the comments! ! It's not a fully functioning Java code… kinda pseudo

import java.xyz ... // what's needed

public class ExpectedProductInfo {

  // define 182 class variables – Very bad approach!
  private String attr1;
  private String attr2;
  private String attr3;
  /*
  .
  .
  .
  */
  private String attr182;

  // good approach: an ordered collection: index 1 hold 1st variable and so on:
  ArrayList<String> attributes = new ArrayList<>(182);

  // A better approach: a Map based collection like HashMap. So you don't need
  // to follow the order of values, you can insert, get and manipulate them
  // consistently with their keys ...


  /**
   * reads a file and put each line in the collection
   * could be called on class instance or directly on the constructor
   * @param pathToFile path to file which contains the info line by line
   */
  private void readInfoFile(String pathToFile){
    File some = new File("some.txt");

    try {
      Scanner sc = new Scanner(some);

      while(sc.hasNextLine()){
        attributes.add(sc.nextLine());
      }
      sc.close();
    }
    catch (FileNotFoundException e) {
      e.printStackTrace();
    }
  // Now the attributes contains each line as an element in order
  }

}