如何将文本文件存储到数组 <double> 使用Double.parseDouble（string s）方法

Question

I have text file called numbers2.txt that I need to store into an ArrayList<Double> using the Double.parseDouble(string s) method. I have no idea on how to do this.

Here is what I have so far.

import java.util.Scanner;

public class Operator {
    public void createArrayList() {
        String[] math = {"add ", "Subtract ", "multiply ", "divide ", "remainder ", "Greaterthan ",
                "lessthan ", "max ", "min ", "power"};
        Scanner file = new Scanner("data\numbers2.txt");
    }
}

The text file includes: 1 2 3 4 5 6 7 8 9 10

Any help would be appreciated, thank you.

Answer 1

You can use BufferedReader to load the file.

BufferedReader br = new BufferedReader(new FileReader("<Filename>"));

After loading the file, you can store the value from text file to a String variable line by line.

String line = br.readLine();