How to read and manipulate values from text file by using java code

First of all create a text file and call it "txtFile.txt", now add the following values into the text file.

10
50.1
Amzi

Now, create a java class into the same folder where you have stored the txtFile.txt
The java class will be as follows.

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class ManipulateTxtfile {

    public static void main(String[] args) {
        try {
            Scanner in = new Scanner(
                    new File("txtFile.txt"));
            int first = in.nextInt();
            double second = in.nextDouble();
            String name = in.next();
            double sum = first + second;
            System.out.println("Hello " + name + "\nThe sum of " + first
                    + " and " + second + " is = " + sum);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
}

The output of the above program will look something like this:

Hello Amzi
The sum of 10 and 50.1 is = 60.1