Write a program that generates 10 random doubles, all between 1 and 11, and writes them to a text file, one number per line. Then write another program that reads the text file and displays all the doubles and their sum accurate to two decimal places.

WriteDoubleValuesFile.java

import java.io.File;

import java.io.FileNotFoundException;

import java.io.PrintWriter;

import java.util.Random;

public class WriteDoubleValuesFile {

  public static void main(String[] args) throws FileNotFoundException {

      File file = new File("doubleFile");

      PrintWriter pw = new PrintWriter(file);

      double start = 1;

      double end = 11;

      Random random = new Random();

      for(int i=0; i<10; i++){

      double randNum = start + (random.nextDouble() * (end - start));

      pw.write(randNum+"\n");

      }

      System.out.println("File has been geenrated");

      pw.flush();

      pw.close();

  }

}

ReadDoubleValuesFile.java

import java.io.File;

import java.io.FileNotFoundException;

import java.util.Random;

import java.util.Scanner;

public class ReadDoubleValuesFile {

  public static void main(String[] args) throws FileNotFoundException {

      File file = new File("doubleFile");

      Scanner scan = new Scanner(file);

      double sum = 0;

      while(scan.hasNextDouble()){

          double value = scan.nextDouble();

          System.out.println(value);

          sum = sum + value;

      }

      System.out.println("The total is "+sum);

      scan.close();

  }

}

Explanation:

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