Question
This is a Java Programming Assignment. ============================================================================================ ============================================================================================ What I need to do - Assignment 7: This assignment is built on top of Assignment 6.
This is a Java Programming Assignment.
============================================================================================
============================================================================================
What I need to do - Assignment 7:
This assignment is built on top of Assignment 6.
Add capability to handle Grade Book for different subjects (Chemistry and Computer Science).
We will assume a maximum of five assignments and up to 40 students.
Details will be provided in the class.
============================================================================================
============================================================================================
Following is my Assignment 6 code:
//Driver.java
package driver;
import model.Statistics;
import model.Student;
import Util.FileIO;
import Util.RCOutline;
import Util.Serialization;
public class Driver extends RCOutline{
public static final boolean DEBUG_MODE = true;
public static void main(String[] args) {
Student s[] = new Student[40];
s = FileIO.readFile("quiz.txt", s);
Statistics statPoints = new Statistics();
statPoints.findLow(s);
statPoints.findHigh(s);
statPoints.findAvg(s);
statPoints.printLowScores();
statPoints.printHighScores();
statPoints.printAvgScores();
for (int i = 0; i
s[i].setClassStats(statPoints);
Serialization.serialize(new String("Student")+((Integer)i).toString()+new String (".stu"), s[i]);
}
if(DEBUG_MODE)
{
}
}
}
---------------------------------------------------------------------------------------------------------
//Student.java
package model;
import java.io.Serializable;
public class Student extends ReportCard implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private int SID;
protected int scores[] = new int[5];
private Statistics classStats;
// Defalut constructor
public Student() {
}
/* Public get and set methods for SID and scores */
@Override
public int getSID() {
return SID;
}
@Override
public void setSID(int SID) {
this.SID = SID;
}
@Override
public int[] getScores() {
return scores;
}
@Override
public int getScore(int index) {
return scores[index];
}
@Override
public void setScores(int[] scores) {
this.scores = scores;
}
@Override
public void setScore(int scores, int index) {
this.scores[index] = scores;
}
@Override
public Statistics getClassStats() {
return classStats;
}
@Override
public void setClassStats(Statistics classStats) {
this.classStats = classStats;
}
// add methods to print values of instance variables.
public void printScores() {
System.out.printf("------- Quiz Scores -------%n");
for (int i = 0; i
System.out.printf("Quiz %d: %d %n", i + 1, scores[i]);
}
System.out.printf("--- - End Quiz Scores ----- %n");
}
public void printStudentID() {
System.out.printf("Student ID: %d %n", SID);
}
@Override
public void printscores(int id) {
// TODO Auto-generated method stub
}
@Override
public void printstats() {
// TODO Auto-generated method stub
}
@Override
void findLow(Student[] studs) {
// TODO Auto-generated method stub
}
@Override
void findHigh(Student[] studs) {
// TODO Auto-generated method stub
}
@Override
void findAvg(Student[] studs) {
// TODO Auto-generated method stub
}
-----------------------------------------------------------------------------------------------
//Statistics.java
package model;
import java.io.Serializable;
public class Statistics extends ReportCard implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
private int[] lowScores = new int[5];
private int[] highScores = new int[5];
private float[] avgScores = new float[5];
/* This method will find the lowest score. */
@Override
public void findLow(Student[] studs) {
for (int i = 0; i
int current = 919;
for (int j = 0; j
if (studs[j].getScore(i)
current = studs[j].getScore(i);
}
}
lowScores[i] = current;
}
}
/* This method will find the highest score. */
@Override
public void findHigh(Student[] studs) {
for (int i = 0; i
int current = -99;
for (int j = 0; j
if (studs[j].getScore(i) > current) {
current = studs[j].getScore(i);
}
}
highScores[i] = current;
}
}
/* This method will find avg score for each quiz. */
@Override
public void findAvg(Student[] studs) {
for (int i = 0; i
float total = 0;
for (int j = 0; j
total += studs[j].getScore(i);
}
avgScores[i] = total / studs.length;
}
}
public void printHighScores() {
System.out.printf("------- High Scores ------- %n");
for (int i = 0; i
System.out.printf("Quiz %d: %d %n", i + 1, highScores[i]);
}
System.out.printf("----- End High Scores ----- %n");
}
public void printLowScores() {
System.out.printf("------- Low Scores ------- %n");
for (int i = 0; i
System.out.printf("Quiz %d: %d %n", i + 1, lowScores[i]);
}
System.out.printf("----- End Low Scores ----- %n");
}
public void printAvgScores() {
System.out.printf("----- Average Scores ----- %n");
for (int i = 0; i
System.out.printf("Quiz %d: %f %n", i + 1, avgScores[i]);
}
System.out.printf("--- End Average Scores --- %n");
}
@Override
public void printscores(int id) {
// TODO Auto-generated method stub
}
@Override
public void printstats() {
// TODO Auto-generated method stub
}
@Override
int getSID() {
// TODO Auto-generated method stub
return 0;
}
@Override
void setSID(int SID) {
// TODO Auto-generated method stub
}
@Override
int[] getScores() {
// TODO Auto-generated method stub
return null;
}
@Override
int getScore(int index) {
// TODO Auto-generated method stub
return 0;
}
@Override
void setScores(int[] scores) {
// TODO Auto-generated method stub
}
@Override
void setScore(int scores, int index) {
// TODO Auto-generated method stub
}
@Override
void printScores() {
// TODO Auto-generated method stub
}
@Override
Statistics getClassStats() {
// TODO Auto-generated method stub
return null;
}
@Override
void setClassStats(Statistics classStats) {
// TODO Auto-generated method stub
}
------------------------------------------------------------------------------------------------
//FileIO.java
package Util;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.StringTokenizer;
import model.Student;
public class FileIO {
public static Student[] readFile(String filename, Student[] stu) {
int studentCounter = -99;
try {
FileReader file = new FileReader(filename);
BufferedReader fileBuff = new BufferedReader(file);
boolean eof = false;
studentCounter = -1;
while (!eof) {
String line = fileBuff.readLine();
if (line == null) {
eof = true;
continue;
}
else if(studentCounter >= 0) {
StringTokenizer st = new StringTokenizer(line);
stu[studentCounter] = new Student();
int quizCounter = -1;
while (st.hasMoreTokens()) {
String currentToken = st.nextToken();
int value = Integer.parseInt(currentToken);
if(quizCounter == -1) {
stu[studentCounter].setSID(value);
}
else {
stu[studentCounter].setScore(value, quizCounter);
}
quizCounter++;
}
}
studentCounter++;
}
fileBuff.close();
} catch (IOException e) {
System.out.println(e.toString());
e.printStackTrace();
}
return trimArray(stu, studentCounter);
}
private static Student[] trimArray(Student[] arr, int count) {
Student[] newArr = new Student[count];
for(int i=0; i newArr[i] = arr[i]; } return newArr; } } --------------------------------------------------------------------------------------- //RCOutline.java package Util; public abstract class RCOutline implements Reportable { public void printscores(int id) { } public void printstats() { } } ----------------------------------------------------------------------------------------- //Reportable package Util; public interface Reportable { public void printscores(int id); public void printstats(); public boolean DEBUG = true; } -------------------------------------------------------------------------------------------- //Serialization package Util; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; public class Serialization { public static boolean serialize(String filename, Object obj) { try { ObjectOutputStream serializer = new ObjectOutputStream(new FileOutputStream(filename)); serializer.writeObject(obj); serializer.close(); if(true) { System.out.println("Sucess!"); } }catch (IOException e) { e.printStackTrace(); return false; } return true; } public static Object deSerizlize(String filename) { try { ObjectInputStream deSerializer = new ObjectInputStream(new FileInputStream(filename)); Object data = deSerializer.readObject(); deSerializer.close(); return data; }catch (IOException | ClassNotFoundException e) { e.printStackTrace(); return null; } } ================================================================================================ ================================================================================================ Some notes that made me confused: Lab 7 ..Requirements for Lab 7 were covered. ..design Presentation on 11/29 Requirements for Gradebook - through interfaces and abstract classes. Instructor - Given a text file upload student grades. Modifying (using a new file) Deliver grades Query grades for any class Query grades for any class/student Compute Grade and Statistics (input a rubric) Work through the API - instructor interface ..Agile development ....For an instructor - declare an interface with all methods needed for each feature. .... 1. For each interface method - I would implement in an abstract clas - and think about existing methods to integrate for developing the method. 2. If newer classes are needed - then design those in class diagram. Student - Query grade for aclass. View grade progres Work through the API - student interfaceLab 7 My assignment 6 code isn't totally correct. Here is notes for Assignment 6, I think my class "FileIo" should be "GradeBook". Review - Lab 6 This assignment is built using the code from Assignment 5. In this assignment create a separate serialized file using ObjectOutputStream for each student. File should contain student's score and statistics for entire class. model - ReportCard that contains Stats and Student (make this class abstract) - let it implement Reportable interface. Statistics Student util - FileIO separate serialized file (contains student's score and statistics) Using debug mode (with Debug flag) print the contents of the serialized file. Create and implement an interface to: Print student statistics. Print scores for a given student id. implement the Debug flag globally Use an abstract class to implement all the methods declared in an interface.Lab 6 - ReportCard should work with upto 40 students How is ReportCard created? by util - readFile - returns an array of students. Statistics - computes statistics build report card object - in an array - so you can easily serialize each ReportCard - Interface - Reportable public void printscores(int id); public void printstats(); public boolean DEBUG = true; public abstract class RCOutline implements Reportable { public void printscores(int id) { } public void printstats() { } } public class Driver extends RCOutline { public static void main(String [] args) { } } 11/20 - If RCOutline is not created and ReportCard becomes abstract - then ReportCard must be extended to be instantiated. /adapter - Reportable ReportCard Any class that extends ReportCard to instantiate ReportCard Review - Lab 6 /driver /Driver.java Reportable a1 = new ChildReportCard("35a.txt"); a1.printscore(1221); a1.printscore(1223); a1.printscore(1224); a1.printstats(); ====================================================================================== ====================================================================================== What is the previous Assignment Requirement: (You can ignore this) Assignment 5 Object Relationship and File IO Write a program to perform statistical analysis of scores for a class of students.The class may have up to 40 students.There are five quizzes during the term. Each student is identified by a four-digit student ID number. The program is to print the student scores and calculate and print the statistics for each quiz. The output is in the same order as the input; no sorting is needed. The input is to be read from a text file. The output from the program should be similar to the following: Here is some sample data (not to be used) for calculations: Stud Q1 Q2 Q3 Q4 Q5 1234 78 83 87 91 86 2134 67 77 84 82 79 1852 77 89 93 87 71 High Score 78 89 93 91 86 Low Score 67 77 84 82 71 Average 73.4 83.0 88.2 86.6 78.6 The program should print the lowest and highest scores for each quiz. Plan of Attack Learning Objectives You will apply the following topics in this assignment: File Input operations. Working and populating an array of objects. Wrapper Classes. Object Oriented Design and Programming. Understanding Requirements Here is a copy of actual data to be used for input. Stud Qu1 Qu2 Qu3 Qu4 Qu5 1234 052 007 100 078 034 2134 090 036 090 077 030 3124 100 045 020 090 070 4532 011 017 081 032 077 5678 020 012 045 078 034 6134 034 080 055 078 045 7874 060 100 056 078 078 8026 070 010 066 078 056 9893 034 009 077 078 020 1947 045 040 088 078 055 2877 055 050 099 078 080 3189 022 070 100 078 077 4602 089 050 091 078 060 5405 011 011 000 078 010 6999 000 098 089 078 020 Essentially, you have to do the following: Read Student data from a text file. Compute High, Low and Average for each quiz. Print the Student data and display statistical information like High/Low/Average.. Design This program can be written in one class. But dividing the code into simple and modular classes based on functionality, is at the heart of Object Oriented Design. You must learn the concepts covered in the class and find a way to apply. Please make sure that you put each class in its own .java file. package lab2; class Student { private int SID; private int scores[] = new int[5]; //write public get and set methods for //SID and scores //add methods to print values of instance variables. } /************************************************************************************/ package lab2; class Statistics { int [] lowscores = new int [5]; int [] highscores = new int [5]; float [] avgscores = new float [5]; void findlow(Student [] a) { /* This method will find the lowest score and store it in an array names lowscores. */ } void findhigh(Student [] a) { /* This method will find the highest score and store it in an array names highscores. */ } void findavg(Student [] a) { /* This method will find avg score for each quiz and store it in an array names avgscores. */ } //add methods to print values of instance variables. } ************************************************************************************/ package lab2; class Util { Student [] readFile(String filename, Student [] stu) { //Reads the file and builds student array. //Open the file using FileReader Object. //In a loop read a line using readLine method. //Tokenize each line using StringTokenizer Object //Each token is converted from String to Integer using parseInt method //Value is then saved in the right property of Student Object. } } ************************************************************************************/ //Putting it together in driver class: public static void main(String [] args) { Student lab2 [] = new Student[40]; //Populate the student array lab2 = Util.readFile("filename.txt", lab2); Statistics statlab2 = new Statistics(); statlab2.findlow(lab2); //add calls to findhigh and find average //Print the data and statistics } Topics to Learn Working with Text Files //ReadSource.java -- shows how to work with readLine and FileReader public class ReadSource { public static void main(String[] arguments) { try { FileReader file = new FileReader("ReadSource.java"); BufferedReader buff = new BufferedReader(file); boolean eof = false; while (!eof) { String line = buff.readLine(); if (line == null) eof = true; else System.out.println(line); } buff.close(); } catch (IOException e) { System.out.println("Error -- " + e.toString()); } } } //How do you tokenize a String? You can use other ways of doing this, if you like. StringTokenizer st = new StringTokenizer("this is a test"); while (st.hasMoreTokens()) { System.out.println(st.nextToken()); } //How to convert a String to an Integer int x = Integer.parseInt(String) ; Assignment 6 This assignment is built using the code from Assignment 5. In this assignment create a separate serialized file using ObjectOutputStream for each student. File should contain student's score and statistics for entire class. Using debug mode (with Debug flag) print the contents of the serialized file. Create and implement an interface to: 1. Print student statistics. 2. Print scores for a given student id. 3. implement the Debug flag globally Use an abstract class to implement all the methods declared in an interface. I need this Solution in three hours. If you can't finish the whole program, please provide the map of package, class, abstract class and interface to me. Thank you very much!
..lab 6 review
public abstract class ScoreReport implements Reportable{ Student s1; Statistics s2; ScoreReport(Student s1, Statistics s2) { this.s1 = s1; this.s2 = s2; } } public class GB extends ScoreReport { Student[] Statistics ScoreReport[] GB(String fname){ //read the file and make student array. //compute statistics //create an array of ScoreReport objects //Serializes each ScoreReport object. } }
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MySQL Crash Course A Hands On Introduction To Database Development
Authors: Rick Silva
1st Edition
1718503008, 978-1718503007
