Java program that takes three numbers as input to calculate and print the average of the numbers.

import java.util.Scanner;
class Exercise3{
	public static void main(String args[]){
		Scanner sc=new Scanner(System.in);
		System.out.println("Enter first number");
		float num1=sc.nextInt();
		System.out.println("Enter second number");
		float num2=sc.nextInt();
		System.out.println("Enter third number");
		float num3=sc.nextInt();
		System.out.println("Enter fourth number");
		float num4=sc.nextInt();
		System.out.println("Enter fifth number");
		float num5=sc.nextInt();
		float average;
		average=(num1+num2+num3+num4+num5)/5;
		System.out.println("Average = "+average);
	}
}

Save as: Exercise3.java

Output: