Write a program that sums the area of all lands and displays the total volume in

Question

Write a program that sums the area of all lands and displays the total volume in acres. There are 0.404687261 hectares in an acre and 4 roods in an acre.  Display the acreage with only three decimal digits of accuracy.

land.txt:

The program is to be written in Java.

COMP163 Acreage The county has a list of public lands as measured by surveyors. You are to write a program that calculates how much public land the county has. The data file land.txt contains a list of numbers representing the area of the land. Each line of the file contains a number with a decimal point followed by the unit of measurement. The units can be acre (represented by "ac"), hectare (represented as "ha") or rood (represented by "rood"). The units might be in a mixture of upper and lower case letters. A. [85 points] Write a program that sums the area of all lands and displays the total volume in acres. There are 0.404687261 hectares in an acre and 4 roods in an acre. B. [15 points] Display the acreage with only three decimal digits of accuracy Sample output The total area is 402062.0264791727 acres or The total area is 402062.026 acres

Explanation / Answer

import java.io.File;
import java.io.FileNotFoundException;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Scanner;

import javafx.scene.input.DataFormat;

/**
*
*/

/**
* @author XXXXX
*
*/
public class SumAcres {

   /**
   *
   */
   public SumAcres() {
       // TODO Auto-generated constructor stub
   }

   /**
   * @param args
   * @throws FileNotFoundException
   */
   public static void main(String[] args) {

       File file = new File("land.txt");
       @SuppressWarnings("resource")
       Scanner reader = null;
       try {
           reader = new Scanner(file);
       } catch (FileNotFoundException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
       double sum = 0;
       while (reader.hasNextLine()) {
           String line = reader.nextLine();
           double input = Double.parseDouble(line.split(" ")[0]);
           String unit = line.split(" ")[1];
           if (unit.equalsIgnoreCase("ac")) {
               sum += input;
           } else if (unit.equalsIgnoreCase("rood")) {
               input = (input / 4.0);// Converting to acre
               sum += input;
           } else if (unit.equalsIgnoreCase("ha")) {
               input = (input / 0.404687261);// Converting to acre
               sum += input;
           } else {
               //
           }

       }
       System.out.println("The total area is " + sum + " acres");
       System.out.println();
       DecimalFormat df = new DecimalFormat("#.###");
       System.out.println("The total area is " + df.format(sum) + " acres");

   }

}

=========

The total area is 397351.35110632394 acres

The total area is 397351.351 acres

========

Thanks

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