[SOLVED] Computer science java programming

I need an explanation for this Java question to help me study.

3. The following program reads three integers and prints the average. Fill in the blanks so that it will work correctly.

import java.util.Scanner;

public class Average

{

public static void main(String[] args)

{

int val1, val2, val3;

double average;

Scanner scan = new Scanner(System.in);

val1 = scan.nextInt(); // get three values from user

val2 = scan.nextInt();

val3 = scan.nextInt();

System.out.println(“Please enter three integers and ” +

“I will compute their average”);

average = (val1 + val2 + val3) / 3; //compute the average

System.out.println(“Average is ” + average); //print the average

}

}