Code in JAVA language Task #1 Writing Output to a File1. Create a project using StatsDemoStarter.java from Module 12 and Numbers.txtfrom Module 12. (Optionally you could copy the starter code located at thebottom of this document).2. First we will write output to a file:a. Create a FileWriter object passing it the filename Results.txt (Don'tforget the needed import statement).b. Create a PrintWriter object passing it the FileWriter object.c. Since you are using a FileWriter object, add a throws clause to themain method header. (throws IOException) The reason for this will beexplained in Module 13.d. Print the mean and standard deviation to the output file using a threedecimal format, labeling each.e. Close the output file.3. Run your project. You will need to type in the filename Numbers.txt. You shouldget no output to the console, but running the program will create a file calledResults.txt with your output. The output you should get at this point is: mean0.000, standard deviation = 0.000. This is not the correct mean or standarddeviation for the data, but we will fix this in the next tasks.Task #2 Calculating the Mean1. Now we need to add lines to allow us to read from the input file and calculate themean.a. Create a File object passing it the filename.(See slide 11)b. Create a Scanner object passing it the File object. .(See slide 11)2. Write a priming read to read the first line of the file.3. Write a loop that continues until you are at the end of the file. (See slide 15)4. The body of the loop will:а.convert the line into a double value and add the value to the accumulatorb. increment the counterc. read a new line from the file5. When the program exits the loop close the input file.6. Calculate and store the mean. The mean is calculated by dividing the accumulatorby the counter.Copyright © 2019 Pearson Education, Inc., Hoboken NJ7. Compile, debug, and run. You should now get a mean of 77.444, but the standarddeviation will still be 0.000. Task #3 Calculating the Standard Deviation1. We need to reconnect to the file so we can start reading from the top again.Create a Scanner object passing it the File object created in Task# 2.(Seeslide 11)а.2. Reinitialize the sum and count t 0.3. Write a priming read to read the first line of the file.4. Write a loop that continues until you are at the end of the file.5. The body of the loop will:а.convert the line into a double value and subtract the mean, store the resultin differenceb. add the square of the difference to the accumulatorc. increment the counterd. read a newline from the file.6. When the program exits the loop close the input file.7. The variance is calculated by dividing the accumulator (sum of the squares of thedifference) by the counter. Calculate the standard deviation by taking the squareroot of the variance (Use the Math.sgrt method to take the square root).8. Run your project. You should get a mean of 77.444 and standarddeviation of 10.021.

import java.io.*;import java.util.*; public class Main {public static void main(String[] args)…

Task #1 Writing Output to a File 1. Create a project using StatsDemoStarter.java from Module 12 and Numbers.txt from Module 12. (Optionally you could copy the starter code located at the bottom of this document). 2. First we will write output to a file: a. Create a FileWriter object passing it the filename Results.txt (Don't forget the needed import statement). b. Create a PrintWriter object passing it the FileWriter object. c. Since you are using a FileWriter object, add a throws clause to the main method header (throys JOExcention) The reason for this will be

Task #1 Writing Output to a File 1. Create a project using StatsDemoStarter.java from Module 12 and Numbers.txt from Module 12. (Optionally you could copy the starter code located at the bottom of this document). 2. First we will write output to a file: a. Create a FileWriter object passing it the filename Results.txt (Don't forget the needed import statement). b. Create a PrintWriter object passing it the FileWriter object. c. Since you are using a FileWriter object, add a throws clause to the main method header (throys JOExcention) The reason for this will be

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Write a program that reads a file named input.txt and writes a file that contains the same contents, but is named output.txt. The input file will contain more than one line when I test this and so should your output file. Do not use a path name when opening these files. This means the files should be located in the top level folder of the project. This would be the folder that contains the src folder. Do not use a copy method that is supplied by Java. Your program must read the file line by line and write the file itself.
Using PyCharm, create a new Project lab12. Under lab12 create a new Directory exercise,then create a Python file called name.py in which to write a class named Name. This classholds the entire name of a person, that is, first, middle and last names and a suffix, andkeeps count of how many of these names are being used (this is explained below).1. The class has the following fields: count, first, middle, last and suffix.2. The class has a constructor that receives one string parameter named name whosedefault value is an empty string (that is, calling the constructor with no parameterssets the value of name to an empty string). The constructor initializes all fields basedon the value of name, as explained next:– The value of count depends on the number of words in name. For example,given the name Robert John Downey Jr then count is 4.– If name has one word then it has a first name.– If name has two words then it has a first and last names in that order.– If name has three words then it…
Using PyCharm, create a new Project lab12. Under lab12 create a new Directory exercise,then create a Python file called name.py in which to writea class named Name. This class holds the entire name of a person, that is, first, middle and last names and a suffix, and keeps count of how many of these names are being used (this is explained below). 1. The class has the following fields: count, first, middle, last and suffix.2. The class has a constructor that receives one string parameter named name whose default value is an empty string (that is, calling the constructor with no parameters sets the value of name to an empty string). The constructor initializes all fields based on the value of name, as explained next: – The value of count depends on the number of words in name. For example,given the name Robert John Downey Jr then count is 4.– If name has one word then it has a first name.– If name has two words then it has a first and last names in that order.– If name has three words…
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Task #3 Writing Output to a File1. Copy the files StatsDemo.java (see Code Listing 4.2) and Numbers.txt from theStudent Files or as directed by your instructor.2. First we will write output to a file:a. Create a FileWriter object passing it the filename Results.txt (Don’tforget the needed import statement).b. Create a PrintWriter object passing it the FileWriter object.c. Since you are using a FileWriter object, add a throws clause to themain method header.d. Print the mean and standard deviation to the output file using a threedecimal format, labeling each.e. Close the output file.3. Compile, debug, and run. You will need to type in the filename Numbers.txt. Youshould get no output to the console, but running the program will create a filecalled Results.txt with your output. The output you should get at this point is:mean = 0.000, standard deviation = 0.000. This is not the correct mean orstandard deviation for the data, but we will fix this in the next tasks.Task #4 Calculating the…
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