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java - 如何将文本文件放入数组并搜索特定值但仅限于一维数组

问题描述

正如标题所说，我正在尝试将这个气象站数据文件放入一个数组中，并能够通过菜单系统在文件中搜索特定值。我构建了菜单系统，但不知道如何将文件导入这样的数组或一系列数组。我唯一的问题是我仅限于对数据使用一维数组。我的教科书和教授都没有任何帮助。这是我到目前为止所拥有的：

import java.io.*;
import java.util.*;

public class VidrioTomas2 {
public static void main(String[] args) 
  throws FileNotFoundException {

  System.out.println("Please give the data titled 'Bellevue College Weather Station Data.txt'.");
  System.out.println("The data must be in the 10 minute data format.");
  Scanner console = new Scanner (System.in);
  System.out.print("Please type the file name: ");
  String name = console.nextLine(); //Uses the user input to find the file.
  if (name.equals("Bellevue College Weather Station Data.txt")) { //Needs to type the.txt and in the way the program says it is.
     System.out.println("\nFile name secured. Proceeding to next step.");
     File input = new File(name); //Stores the file into a value that can used in other methods.
  if(input.length() == 67481){
     System.out.println("\nLength of file: " + input.length() + "\nConfirmation of data. Proceeding to next step."); //Used as a confirmation that the file is true and working.
     System.out.println("The following options are available. Please select one of them.");
     System.out.println("1) Peak Wind Speed" 
                       + "\n2) Maximum Temperature" 
                       + "\n3) Humidity and Temperature" 
                       + "\n4) Solar Energy" 
                       + "\n5) End Program");
     Scanner secondConsole = new Scanner (System.in);
     System.out.print("Your selection: ");
     int choice = secondConsole.nextInt();//Uses the user input to start up one of the options.
        switch (choice) {
           case 1:
              System.out.println("Starting Peak Wind Speed Calculation. . .");
              peakWindSpeedCalc(input);
              break;
           case 2:
              System.out.println("Starting Maximum Temperature Calculation. . .");
              maximumTempCalc(input);
              break;
           case 3:
              System.out.println("Starting Humidity and Temperature Calculation. . .");
              humidAndTempCalc(input);
              break;
           case 4:
              System.out.println("Starting Solar Energy Calculation. . .");
              solarEnergyCalc(input);
              break;
           case 5:
              System.out.println("Ending program. . .");
              break;
        }
       } else {
        System.out.println("Inproper file. Ending program. . ."); //Kills if the length is not the same. The file I had had a length of 67481.
        }
  } else {
     System.out.println("\nInproper name or type. Ending program. . ."); //Kills if file name is wrong. Caps sensitive.
  }
} 

public static void peakWindSpeedCalc(File rawData) {
  System.out.println("Placeholder.exe is active. peakWindSpeedCalc is linked correctly.");
}

public static void maximumTempCalc(File rawData) {
  System.out.println("Placeholder.exe is active. maximumTempCalc is linked correctly.");
}

public static void humidAndTempCalc(File rawData) {
  System.out.println("Placeholder.exe is active. humdAndTempCalc is linked correctly.");
}

public static void solarEnergyCalc(File rawData) {
  System.out.println("Placeholder.exe is active. solarEnergyCalc is linked correctly.");
}
}

标签： javaarrays

解决方案

看起来你有文件对象：

File input = new File(name);

接下来，您需要对其进行解析。从你的截图来看，前几行并不是完全有用，所以你可以跳过它们，然后split()在有用的行上使用：

String[] firstline = Files.readAllLines(file.toPath()).get(3).split("\\W");

现在你有了一个数组，其中包含第一行的每个值。你可以设置常量来索引到这个列表中，所以你可以像引用它一样引用它firstline[BAR]。

如果要将所有内容存储在单个数组中，则可以像这样对其进行索引，例如：

data[line * numColumns + col]

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