如何从文件中读取java中的所有数据并形成数组列表

这是我到目前为止所知道的，但是idk知道如何从参数获取文件名输入

Temperature, Year, Month_Avg, Country, Country_Code
1.62425, 2000, Jan, Afghanistan, AFG
1.92871, 2000, Feb, Afghanistan, AFG
7.48463, 2000, Mar, Afghanistan, AFG

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这看起来像是您试图读取的CSV文件。 我建议使用一个库，例如

如果您使用的是Maven，请将以下内容添加到POM.xml中：

public ArrayList<ITemperature> readDataFromFile(String fileName){
     // read all data from the weather data file 
    File file = new File("C:\\Users\\JTPD_\\eclipse-workspace\\Climate Change Analysis\\data\\world_temp_2000-2016.csv");
    BufferedReader br = new BufferedReader(new FileReader(file));
    }

代码：

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请显示您当前解决问题的尝试。请提供最小可复制样本，看起来像CSV文件。使用库，例如。或者，您也可以逐行读取它们，按逗号拆分并将它们存储在数组中。

public ArrayList<ITemperature> readDataFromFile(String fileName){
     // read all data from the weather data file 
    File file = new File("C:\\Users\\JTPD_\\eclipse-workspace\\Climate Change Analysis\\data\\world_temp_2000-2016.csv");
    BufferedReader br = new BufferedReader(new FileReader(file));
    }

<dependency>
    <groupId>com.opencsv</groupId>
    <artifactId>opencsv</artifactId>
    <version>5.1</version>
</dependency>

compile "com.opencsv:opencsv:5.1"

// This is for Java 10. If you're using Java 8 or lower, you can't use var.

// Filename should be entire file Path
var isr = new InputStreamReader(new FileInputStream(fileName, StandardCharsets.UTF_8));

// withSkipLines will skip the header row. If you want to retain it, remove skipLines
var reader = new CSVReader(isr).withSkipLines(1).build();;

String[] lineArray;
while ((lineArray= csvReader.readNext()) != null) {
     System.out.println("Temperature: " + lineArray[0]);
     System.out.println("Year: " + lineArray[1]);
     System.out.println("Month_Avg: " + lineArray[2]);
     System.out.println("Country : " + lineArray[3]);
     System.out.println("Country_Code : " + lineArray[4]);
}