An example of Reading a File with the Scanner Class

info.txt

4
100 100 100 100
30 45 69 300
400 100 20 40
50 30 70 90

ReadFile

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

public class ReadFile {

	public static void main(String[] args) throws IOException {
		Scanner input = new Scanner(System.in);
		Scanner file = new Scanner(new File("info.txt"));

		int numLines = file.nextInt();
		int sum = 0;
		String textLine = "";

		for (int line = 0; line < numLines; line++) {
			for (int data = 0; data < 4; data++) {
				sum = sum + file.nextInt();
			}
			System.out.println("Mean: " + (double)(sum / 4.0));
			sum = 0;
		}
	}
}