Question

In java. You are provided an abstract class called MyAbstract. You can only modify the writeFile () class. You are provided another class called Finally you are provided the file you must read from in the MyAbstract class. You will need to extend MyAbstract to MyTestClass.
You should have the following outputs.

The content of myData
employee avg salary
number of employees
File that was created in myFile()

l. Servers ary 1 35 1.81 age) t.java ss.java MyAbstract.java MytestClass.java myData emport java.io. BufferedReader; import java.FALENDER EXSARTAANI 3 import java.io.FileReaders 4 import java.io.IOException; Sport java.AELLENCARI 7 public abstract class MyAbstract public static void readFileString fileName) throws TOException // Do Not Modify BufferedReader br new BufferedReader(new FileReader(FileName)) String data " white ((data. br.readLine()) le null) { System.out.println(data); public abstract void employeeAvgSalary(); This method should display the average salary of Employees found in 11 myData file. public abstract int countNlunberof Employees(); // This method should return the number of employees found in nyata Il file. protected abstract String enplayed Information ()) 1 This method should return all Employee First Name and I found 11 in myData file. public void writeite(){ 350 Drug Shell Use this area to write, run and inspect Java expressions in the context of a debug session ANDAIBABE

Everything I was provided is listed already.

Answer 1

Here is the answer for your question in Java Programming Language.

NOTE : As per the instructions given under the writeFile() method only Employees FirstName and Ids have been written to the output file. You need to create BestEmployees.txt file before writing to it.

As MyAbstract is an abstract class we cannot create object for it directly but we can use its properties by extending it to another class. Hence to simplify the code I have used strings and string arrays to hold file data.

Kindly upvote of you find teh answer helpful.

CODE :

MyAbstract.java

import java.io.BufferedReader; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.util.ArrayList; public abstract class MyAbstract {    public static String eachLine; public static String data = ""; //Implementing readFileMethod() public static void readFile(String fileName) throws FileNotFoundException, IOException{ BufferedReader br = new BufferedReader(new FileReader(fileName));    System.out.println("---------------------------------------------------------------"); System.out.println("First Name\tLastName\tEmployee Id\tSalary"); System.out.println("---------------------------------------------------------------"); //Reading each line to eachLine variable while((eachLine = br.readLine())!= null){    //Adding each line to the data variable by concatinating a new line data += eachLine + "\n"; //Printing data System.out.println(String.format("%-15s%-15s%-15s%s",eachLine.split(",")[0],eachLine.split(",")[1],eachLine.split(",")[2],eachLine.split(",")[3])); }    } public abstract void employeeAvgSalary();    public abstract int countNumberOfEmployees();    protected abstract String[] employeeInformation();    //Implementation of writeFile method public void writeFile() throws IOException{ //You must define the path of the file to access it correctly String path = "C:\\Users\\vysali\\Desktop\\"; //Accessing the file using FileWriter class FileWriter writer = new FileWriter(path+"BestEmployees.txt"); //Getting data from employeeInformation method and storing it in a string array String[] employeeInfo = employeeInformation(); //Getting number of employees by countNumberOfEmployees method int numberOfEmployees = countNumberOfEmployees(); //Writing data to file writer.write("----------------------------------------------\n"); writer.write("First Name\t\tEmployee Id\n"); writer.write("----------------------------------------------\n"); //Loops through the number of employees for(int i=0;i<numberOfEmployees;i++){ //Each time writes employeeinfo i.e., first name and id followed by a next line character writer.write(employeeInfo[i] + "\n"); } //flushing and closing writer object to output data in the file writer.flush(); writer.close(); } }

MyTestClass.java

import java.io.IOException; import java.text.DecimalFormat; public class MyTestClass extends MyAbstract{ //Decimal format to display average to two decimal places DecimalFormat d = new DecimalFormat("0.00"); //int variable to hold number of employees in the file public int numberOfEmployees = countNumberOfEmployees(); //String array to hold each line in the file public static String[] Lines; public static void main(String[] args) throws IOException{ //Creating file namealong with the path String path = "C:\\Users\\vysali\\Desktop\\"; String fileName = "myData.txt"; //Calling readFile method with the filename MyTestClass.readFile(path+fileName); //Creating an object of myTestClass MyTestClass a = new MyTestClass(); //Initialising the Lines array with the size of number of employees Lines = new String[a.countNumberOfEmployees()]; //Storing each Line in the array from the variable data Lines = data.split("\n"); System.out.println("\n--------------------------------------------------------------"); //Displaying number of employees System.out.println("Number of Employees : " + a.numberOfEmployees); //Calling method employeeAvgSalary a.employeeAvgSalary();    //Writing into the file BestEmployees.txt a.writeFile(); System.out.println("Output File has been written successfully"); System.out.println("--------------------------------------------------------------"); } @Override public void employeeAvgSalary() {    long sum = 0; double average; //Gets the number of employees for(int i=0;i<numberOfEmployees;i++){ //Adding up the salary t sum variable sum += Long.parseLong(Lines[i].split(",")[3]); } //Calculating average average = sum/numberOfEmployees; //Displaying average System.out.println("The average of employee's salary is " + d.format(average)); } @Override public int countNumberOfEmployees() { //Returns number of employees by using the length of data when seperated by new lines //Actually returns number of lines in the string data return data.split("\n").length; } @Override protected String[] employeeInformation() { //Initialises a string with size of numberOfEmployees String[] info = new String[numberOfEmployees]; //Loops through number of employees for(int i=0;i<numberOfEmployees;i++){ //Stores the first name and id of each employee to the array info info[i] = String.format("%-20s%s",Lines[i].split(",")[0],Lines[i].split(",")[2]); } return info; } }

myData.txt File

Bob,Smith,@1234,120000 Katy,Johnson,@5625,20000 Alex,King,@1234,121000 Chad,Pettigrew,@1234,100000 David,Smith,@1234,101000 Mark,Walburg,@124,200000 Jennifer,Campbell,@1234,102000

SCREENSHOTS :

Please see the screenshots of the code below for the indentations of the code.

MyAbstract.java

11 9 import java.io.BufferedReader; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.util.ArrayList; public abstract class MyAbstract { public static String eachLine; public static String data = ""; // Implementing readFileMethod() public static void readFile(String fileName) throws FileNotFoundException, IOException BufferedReader br = new BufferedReader (new FileReader (fileName)); System.out.println("------ ------------"); System.out.println("First Name\tLastName\tEmployee Id\tSalary"); System.out.println("--------- -------------------------- //Reading each line to eachLine variable while( (eachLine = br.readLine()) != null) { //Adding each line to the data variable by concatinating a new line data += eachLine + "\n"; // Printing data System.out.println(String.format("}-1535-1535-15333", eachLine.split("")[0], eachLine.split("/") [1], eachLine.split("/") [2] public abstract void employeeAvgSalary(); public abstract int countNumberOfEmployees(); protected abstract String[] employee Information(); // Implementation of writeFile method

public void writeFile() throws IOException //You must define the path of the file to access it correctly String path = "C:\\Users\\vysalil\Desktop\\"; //Accessing the file using FileWriter class FileWriter writer = new FileWriter (path+"Best Employees.txt"); 1/Getting data from employee Information method and storing it in a string array String[] employee Info = employee Information(); // Getting number of employees by count NumberOfEmployees method int numberOfEmployees = count NumberOfEmployees(); //Writing data to file writer.write("---------- -------\n"); writer.write("First Name\t\tEmployee Id\n"); writer.write("----------------------- -----\n"); // Loops through the number of employees for (int i=0;i<numberOfEmployees; i++) { //Each time writes employeeinfo i.e., first name and id followed by a next line character writer.write (employee Info[i] + "\n"); //flushing and closing writer object to output data in the file writer.flush(); writer.close();

MyTestClass.java

© import java.io.IOException; import java.text.Decimal Format; public class MyTestclass extends MyAbstract{ //Decimal format to display average to two decimal places DecimalFormat d = new DecimalFormat ("0.00"); //int variable to hold number of employees in the file public int numberOf Employees = count NumberOfEmployees(); //String array to hold each line in the file public static String[] Lines; public static void main(String[] args) throws IOException //Creating file namealong with the path String path = "C:\\Users\\vysalil\Desktop\\"; String fileName = "myData.txt"; // Calling readFile method with the filename MyTestClass. readFile(path+fileName); // Creating an object of myTestClass MyTestclass a = new MyTestClass(); //Initialising the Lines array with the size of number of employees Lines = new String(a.count NumberOfEmployees ()]; // Storing each Line in the array from the variable data Lines = data.split("\n"); System.out.println("\n--- //Displaying number of employees System.out.println("Number of Employees : " + a.numberOfEmployees); //Calling method employeeAvgSalary a. employeeAvgSalary(); //Writing into the file BestEmployees.txt a.write File(); System.out.println("Output File has been written successfully"); System.out.println("----- ---------");

@Override public void employeeAvgSalary() { long sum = 0; double average; // Gets the number of employees for(int i=0;i<numberOfEmployees; i++) { //Adding up the salary t sum variable sum += Long.parselong (Lines[i].split(",) [3]); //Calculating average average = sum/numberOfEmployees; //Displaying average System.out.println("The average of employee's salary is " + d. Format (average)); @Override public int count NumberOfEmployees () { // Returns number of employees by using the length of data when seperated by new lines //Actually returns number of lines in the string data return data.split("\n").length; @Override protected String[] employee Information() { //Initialises a string with size of numberOfEmployees String[] info = new String[numberOfEmployees]; // Loops through number of employees for(int i=0;i<numberOfEmployees; i++) { //Stores the first name and id of each employee to the array info info[i] = String.format("}-20333", Lines[i].split("")[0], Lines[i].split(",") [2]); return info; }

myData.txt

myData.txt > 1 Bob, Smith,@1234, 120000 2 Katy, Johnson, @5625, 20000 3 Alex, King,@1234, 121000 4 Chad, Pettigrew, @1234,100000 David, Smith, @1234,101000 6 Mark, Walburg, @124, 200000 7 Jennifer, Campbell, @1234, 102000

OUTPUT :

Output - JavaExamples (run) run: First Name Last Name Employee Id Salary Smith @1234 OS Johnson Ở. @1234 b Bob Katy Alex Chad David Mark Jennifer 120000 20000 121000 100000 101000 200000 102000 w King Pettigrew Smith Walburg Campbell b b 12 w Number of Employees : 7 The average of employee's salary is 109142.00 Output File has been written successfully BUILD SUCCESSFUL (total time: 0 seconds)

BestEmployees.txt

Best Employees.txt x - - - - - - - - - - 2 First Name Employee Id - - - 4 Bob 5 Katy 6 Alex 7 Chad 8 David 9 Mark 10 Jennifer 11 @1234 @5625 @1234 @1234 @1234 @124 @1234

Any doubts regarding this can be explained with pleasure :)