java解析文本文件并以不同的方式处理每一行

Question

我正在尝试从文本文件中读取整数，但我想以与其余行不同的方式处理第一行，并采用以下行并循环一些计算。下面是我的文件阅读器，我的问题是关于下一部分的，但这可能提供一些上下文。

public class main
{
    BufferedReader in;
    public main() throws FileNotFoundException
    {
         System.out.println("please enter the name of the text file you wish you import. Choose either inputs or lotsainputs. Nothing else");
        Scanner keyboard = new Scanner(System.in);
        String filename = keyboard.nextLine();
        File file = new File(filename);

        System.out.println("You have loaded file: \t\t"+filename);
        in = new BufferedReader(new FileReader(file));

        Scanner inputFile = new Scanner(file);
        String element1 =  inputFile.nextLine().toUpperCase();
        try
        {
            while ((element1 = in.readLine()) != null)
            {      
                System.out.println("Line to process:\t\t"+element1);
                myCalculations(element1);
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }

    }

第一个文本文件如下所示:

200 345 
36

第二个文本文件如下所示:

200 345 
36
45
36
21

这里是调用的方法:

public static void myCalculations(String s)
    {
        String[] items = s.split(" ");
        int[] results = new int[100];
        String errorMessage = "that's a wrap!";
        for (int i = 0; i < items.length; i++) 
        {
            try {
                int stuff = Integer.parseInt(items[i]);
                results[i] = stuff;
            }
            catch (NumberFormatException nfe) {
                System.out.println(results);
                System.out.println(errorMessage);   
            }
        }
        int health = result[0];
        int power = result[1]; 
        int days = result[2];
        some calculations....
        returns new health and power of the car. 
        same calculations but results[3] as the time period
        returns new health and power of car
        etc....
    }

该方法解析整数，将它们放入 results[] 数组中。

假设文本文件的前两个数字是汽车的健康状况和功率。每个进行的数字都是比赛之间的天数。每场比赛都会有汽车和发动机的老化，老化程度是每场比赛之间的天数。

我已经使用了结果[3][4]和[5]并对恶化进行了硬编码并打印结果，它可以工作，但它非常糟糕。我该如何改进这个方法？我正在复制并粘贴“计算”。如何获取第一行，然后将以下行放入单独的循环中？

理想情况下，文本文件中的天数可以有所不同。即，可能有 5 场比赛，也可能有 3 场比赛，程序将处理这两种情况。

Answer 1

尝试类似的事情

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.util.Arrays;
import java.util.Scanner;

public class Main {


    public static void main(String[] args) throws FileNotFoundException {

        System.out.println(
                "please enter the name of the text file you wish you import. Choose either inputs or lotsainputs. Nothing else");
        Scanner keyboard = new Scanner(System.in);
        String filename = keyboard.nextLine();
        File file = new File(filename);


        System.out.println("You have loaded file: \t\t" + filename);
        BufferedReader in = new BufferedReader(new FileReader(file));

        String element1 = null;
        try {
            element1 = in.readLine();
        }catch (Exception e) {
            // TODO: handle exception
        }

        String[] firstLine = element1.split(" ");

        Arrays.stream(firstLine).forEach(fl -> {
            System.out.println("First line element: " + fl);
        });


        //Do the staff
        String otherElement = null;


        try {
            while ((otherElement = in.readLine()) != null) {
                System.out.println("Line to process:\t\t" + otherElement);

            }
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

}

文件结果:

1 2
3
5
7

是

You have loaded file:       
First line element: 1
First line element: 2
Line to process:        3
Line to process:        5
Line to process:        7