Hi please make sure the answer is right before you post the answer, The first two pictures are the one question and the rest of the pics are info you need to do the problem correctly!!!

Driver.java

package com.company;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.PrintWriter;

import java.util.Scanner;

/**

* Created by naseef on 5/16/18.

*/

public class Driver {

public static void main(String[] args) {

Grades gradesA = initialize("inputHW9A.txt");

Grades gradesB = initialize("inputHW9B.txt");

Grades gradesC = initialize("inputHW9C.txt");

Grades repeat = initialize("inputRepeat.txt");

Grades mergedGrades = merge(gradesA, gradesB, gradesC);

Grades sortedGrades = sort(mergedGrades, repeat);

flush(sortedGrades);

}

public static Grades initialize(String section) {

// PLEASE IMPLEMENT THIS METHOD.

return null;

}

public static Grades merge(Grades gradesA, Grades gradesB, Grades

gradesC) {

Grades mergedGrades = new Grades();

// Identify which method in the Grades class can you use to take

these three Grades and merge them

return mergedGrades;

}

public static Grades sort(Grades mergedGrades, Grades repeat) {

// PLEASE COMPLETE THE METHOD USING THE FOLLOWING LOGIC

// 1: Create a an empty Grades list.

Grades sortedGrades = new Grades();

// 2: Loop through the mergedGrades list and find student with the

highest grade.

// 3: Add this to the sortedGrades list ( use Grades::add Method )

// 4: Remove it from the mergedGrades list ( use Grades::remove

Method)

// 5: Do this till mergedGrades list becomes empty

// If you find collision (two students with the same grade ) this

is how you will resolve it

// 1: if the student has repeated the course, then he will be

moved to the end ( within the GPA block )

// 2: If both students have repeated, or both have not repeated,

but their GPA is the same then sort them by First Name

// 3: If the first name is same, then sort by last name

return sortedGrades;

}

public static void flush(Grades sortedGrades) {

try {

PrintWriter writer = new PrintWriter("outputHW8.txt");

writer.write(sortedGrades.toString()); // Notice how I am

calling toString on Grades class

// Grades toString

calls toString on Grade class that you need to implement.

writer.close();

} catch (FileNotFoundException e) {

}

}

}

Grade.java

package com.company;

/**

* Created by naseef on 5/16/18.

*/

public class Grade {

private String id;

private double gpa;

private String firstName;

private String lastName;

// Please implement the following

// 1: Constructor that takes String id, double gpa, String firstName,

String lastName

// 2: Constructor that takes String id, double gpa, String firstName.

Sets Last Name to NLN

// Getters to get GPA, firstName and LastName. You will use it in the

sort Method in driver class.

// Override the equal method.

// You use it in the sort method in the Driver class to check if a

particular GradeObject exists in the repeat list

// Override the toString method.

// flush method in driver calls toString for Grades class.

// The Grades class has implemented toString override.

// It internally calls Grade::toString.

// So you need to implement this method so that the file is printed

correctly

// In addition, you will need the below two methods

public boolean isLessGPA(Grade grade) {

// implement logic

return false;

}

public boolean isSameGPA(Grade grade) {

// implement logic

return false;

}

}

Grades.java

package com.company;

/**

* Created by naseef on 5/21/18.

*/

public class Grades {

private int capacity;

private int size;

private Grade[] gradeArray;

public final int OFFSET = 4;

public Grades() {

this(4);

}

public Grades(int capacity) {

this.capacity = capacity;

this.gradeArray = new Grade[capacity];

this.size = 0;

}

public void add(Grade grade) {

if(size

gradeArray[size++] = grade;

} else {

this.capacity += OFFSET;

Grade[] temp = new Grade[this.capacity];

for(int i = 0; i

temp[i] = gradeArray[i];

}

temp[size++] = grade;

this.gradeArray = temp;

}

}

public void add(Grades grades) {

for(int i = 0; i

add(grades.get(i));

}

}

public void remove(int index) {

for(int i = index; i

this.gradeArray[i] = this.gradeArray[i+1];

}

this.gradeArray[size-1] = null;

this.size --;

}

public Grade get(int index) {

return gradeArray[index];

}

public int size() {

return this.size;

}

public boolean contains(Grade grade) {

for(int i = 0; i

if(this.gradeArray[i].equals(grade)) {

return true ;

}

}

return false;

}

@Override

public String toString() {

String data = "" ;

for(int i = 0; i

data += gradeArray[i].toString();

data += " ";

}

return data;

}

}

Inputhw9A.txt

S001 3.3 John Rodgers

S002 3.9 Jim

S003 3.9 Misty Fang

S004 3.9 Aseef Hernandez

S005 4.0 Stacy Lu

S006 3.9 Aseef Nilkund

S009 3.9 Steve Calderon

S010 3.8 Raj Singh

Inputhw9B.txt

S011 3.3 Jason Kramer

S012 3.5 Kathy Calderon

S013 3.2 Roopa Singh

S014 2.4 Amid Naveed

S015 1.0 Faith Williams

S016 3.9 Aseef Simmons

Inputhw9C.txt

S017 3.3 Hifza Nilkund

S018 3.5 Hamza Nilkund

S019 3.2 Chris Peach

S020 2.4 Ramona Luke

InputRepeat.txt

S001 3.3 John Rodgers

S013 3.2 Roopa Singh

S014 2.4 Amid Naveed

S016 3.9 Aseef Simmons

Outputhw8.txt

S005: Stacy, Lu 4.0

S004: Aseef, Hernandez 3.9

S006: Aseef, Nilkund 3.9

S002: Jim, NLN 3.9

S003: Misty, Fang 3.9

S009: Steve, Calderon 3.9

S016: Aseef, Simmons 3.9

S010: Raj, Singh 3.8

S018: Hamza, Nilkund 3.5

S012: Kathy, Calderon 3.5

S017: Hifza, Nilkund 3.3

S011: Jason, Kramer 3.3

S001: John, Rodgers 3.3

S019: Chris, Peach 3.2

S013: Roopa, Singh 3.2

S020: Ramona, Luke 2.4

S014: Amid, Naveed 2.4

S015: Faith, Williams 1.0

UW CSS 142C Spring Qtr. 2018 Homework #8 Due 06/02 11:59 PM Processing data using Files and Arrays of Objects-Part2 This is your final HW. You can work in groups or 2 if you like. You will be given 3 files: Driver.java -The entry point of execution. Reads the input files, builds up the data structures in memory, does the merging and sorting and finally flushes the data back to the output file. Grade.java-Class that represents a student entity that has firstName, lastName, grade and student ID Grades java Class that models a dynamic array. via this class we get the ability to create an array of Grades which is dynamic. It can grow or shrink as needed. You will also be given 3 input files: inputHW9A.txt, inputHW9B.txt, inputHW9C.txt These files conceptually represent all the students in Css142C per section along with their GPAs You will also be given a fourth file called "inputRepeat.txt". Contains all the students that have repeated this class before. You are expected to create a project and include the 3 source files and the 4 input files. Go through the comments in the file and implement missing methods and incomplete methods When you finish the project and run your code, you will generate an output file called "outputHW9.txt". This is a file where the grades of all the Students across the three sections are written in a sorted order-highest to lowest after applying the rules as outlined in the merge method. IMP NOTE: . I am keeping the description a bit brief for two reasons o Iwant you to develop the ability to start reading code and interpret what is.needed o We also went at depth in our class where I explained many details about the project. code submitted with compilation errors will get a 0 Code that immediately throws an exception upon running will get a o . Cod e that executes correctly without error, and without any exceptions but does not create the output file or has an empty output file will get a 5 points overall deduction. Please test that your code works with the sample input files provided in this assignment and generates the sample output again provided in this assignment