Write a very small Java program that consist of: 1. A single class named Asn1BAp

Question

Write a very small Java program that consist of:

1.     A single class named Asn1BApp. Save the definition of this class in a file named Asn1BApp.java

2.     The single class Asn1BApp should contain only the main method, and should read a file of numbers (of type double) from a file named asn1b.in. Should write the sum of those numbers (with appropriate label) and average of those numbers (with appropriate label). The sum and average should be displayed using 2 decimal points.

3.     All output should be written to a file named asn1b.out. Use Scanner class for input and PrintWriter class for output.

asn1b.in file:

34.5984

3.402

9874.544333

22.1

0.0003

23.4343

8324.12

3002.32

1231.1100021

5.2

8.012

9942.21

678932.23221

12.1

908.87

234.509233

A single class named Asn1BApp. Save the definition of this class in a file named Asn1BApp.java The single class Asn1BApp should contain only the main method, and should read a file of numbers (of type double) from a file named asn1b.in. Should write the sum of those numbers (with appropriate label) and average of those numbers (with appropriate label). The sum and average should be displayed using 2 decimal points. All output should be written to a file named asn1b.out. Use Scanner class for input and PrintWriter class for output.

Explanation / Answer

// make sure asn1b.in exists in same directory as this program

import java.util.Scanner;

import java.io.*;

public class Asn1BApp

{

public static void main(String args[]) throws IOException

{

//read

Scanner rw = new Scanner(new FileInputStream("asn1b.in"));

//write

PrintWriter fw = new PrintWriter("asn1b.out");

double sum=0,num=0,avg;

int n=0;

while(rw.hasNext())

{

num=rw.nextDouble();

sum =sum+num;

n++;

}

avg = sum/n;

rw.close();

fw.printf("Sum: %.2f",sum);

fw.println();

fw.printf("Average: %.2f",avg);

fw.close();

}

}

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