Create a simple command line Java program to calculate the average of a variable

Question

Create a simple command line Java program to calculate the average of a variable quantity of integers that are passed as an argument when the program is called. This uses the args array from main - you should not create or use a Scanner object. When the program is launched, have it display a welcome message. Also make sure to have the program display a help message if the user forgets to give any integers as the argument.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

Example of calling the program with arguments:

java Average 1 2 3 4 5 6

The result of the above should be something similar to:

Welcome to the Average Program. It is very average really.

The average is: 3.5

Example of calling the program without arguments:

            java Average

The result might be:

            Welcome to the Average Program. It is very average really.

     Usage: java Average X ( X is 1 or more integers )

Note: You do not need to deal with invalid input. For example if the user enters:

java Average kiwi 12.3 the_color_blue

...it is acceptable for the program to crash and burn.

Explanation / Answer

public class Average

{

static int sum =0;

static float average = 0;

public static void main(String[] args)

{

if(args.length == 0){

System.out.println("Welcome to the Average Program. It is very average really."+ " " +""

+ "Usage: java Average X ( X is 1 or more integers )");

}else{

for(int i=0; i< args.length;i++)

sum = sum + Integer.parseInt(args[i]);

average = sum / args.length;

System.out.println("Welcome to the Average Program. It is very average really."+ " " +""

+ "The average is:" + average);

}

}

}

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